/* ===== IMPORTS AND CSS RESET ===== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

* {
    transition: background-color 0.3s ease,
    border-color 0.3s ease,
    color 0.3s ease,
    box-shadow 0.3s ease;
}

/* ===== CSS VARIABLES AND THEME SYSTEM ===== */

:root {
    --scale-factor: 1;

    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --bg-card: rgba(17, 24, 39, 0.8);
    --accent-primary: #3b82f6;
    --accent-secondary: #10b981;
    --accent-tertiary: #8b5cf6;
    --accent-warning: #f59e0b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-primary: rgba(59, 130, 246, 0.2);
    --border-secondary: rgba(16, 185, 129, 0.2);
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #1e40af 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 50%, #047857 100%);
    --gradient-accent: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 50%, #6d28d9 100%);
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    --game-border-color: rgba(59, 130, 246, 0.6);
    --game-border-glow: rgba(59, 130, 246, 0.4);
}

[data-theme="light"] {
    --bg-primary: #faf8f5;
    --bg-secondary: #f0ebe4;
    --bg-tertiary: #e6ddd4;
    --bg-card: rgba(240, 235, 228, 0.8);
    --accent-primary: #3b82f6;
    --accent-secondary: #059669;
    --accent-tertiary: #7c3aed;
    --accent-warning: #d97706;
    --text-primary: #1f2937;
    --text-secondary: #374151;
    --text-muted: #6b7280;
    --border-primary: rgba(59, 130, 246, 0.2);
    --border-secondary: rgba(5, 150, 105, 0.2);
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #1e40af 100%);
    --gradient-secondary: linear-gradient(135deg, #059669 0%, #047857 50%, #065f46 100%);
    --gradient-accent: linear-gradient(135deg, #7c3aed 0%, #6d28d9 50%, #5b21b6 100%);
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
    --game-border-color: rgba(59, 130, 246, 0.8);
    --game-border-glow: rgba(59, 130, 246, 0.5);
}

/* ===== BASE ELEMENTS ===== */

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    font-size: calc(16px * var(--scale-factor));
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(2rem * var(--scale-factor));
}

::-webkit-scrollbar {
    width: calc(6px * var(--scale-factor));
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: calc(3px * var(--scale-factor));
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ===== NAVIGATION AND CONTROLS ===== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    transition: all 0.3s ease, border-color 0.3s ease;
}

.nav:not(.nav--scrolled) {
    border-bottom-color: transparent;
}

.nav--scrolled {
    background: rgba(10, 14, 26, 0.98);
    border-bottom-color: var(--border-primary);
}

[data-theme="light"] .nav {
    background: rgba(250, 248, 245, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

[data-theme="light"] .nav--scrolled {
    background: rgba(250, 248, 245, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(1rem * var(--scale-factor)) calc(2rem * var(--scale-factor));
}

.logo {
    font-size: calc(1.5rem * var(--scale-factor));
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-image {
    height: calc(43px * var(--scale-factor));
    width: calc(43px * var(--scale-factor));
    border-radius: calc(8px * var(--scale-factor));
    object-fit: cover;
}

.nav-links {
    display: flex;
    gap: calc(2rem * var(--scale-factor));
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all 0.3s ease;
    padding: calc(0.5rem * var(--scale-factor)) 0;
    font-size: calc(1rem * var(--scale-factor));
}

.nav-link:hover,
.nav-link:focus {
    color: var(--accent-primary);
    outline: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 0;
    margin-left: calc(1rem * var(--scale-factor));
}

.theme-toggle {
    background: transparent;
    border: 2px solid var(--border-primary);
    border-radius: calc(8px * var(--scale-factor)) 0 0 calc(8px * var(--scale-factor));
    width: calc(44px * var(--scale-factor));
    height: calc(44px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: scale(1.05);
    outline: none;
    z-index: 2;
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    width: calc(20px * var(--scale-factor));
    height: calc(20px * var(--scale-factor));
    fill: var(--text-primary);
    transition: all 0.3s ease;
    position: absolute;
}

.theme-toggle:hover svg,
.theme-toggle:focus svg {
    fill: white;
}

.theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0);
    fill: var(--text-primary);
    stroke: var(--text-primary);
}

.theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

.scale-controls {
    display: flex;
}

.scale-btn {
    background: transparent;
    border: 2px solid var(--border-primary);
    width: calc(44px * var(--scale-factor));
    height: calc(44px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-left: none;
}

.scale-btn--decrease {
    border-radius: 0;
}

.scale-btn--increase {
    border-radius: 0 calc(8px * var(--scale-factor)) calc(8px * var(--scale-factor)) 0;
}

.scale-btn:hover,
.scale-btn:focus {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: scale(1.05);
    outline: none;
    z-index: 2;
}

.scale-btn:active {
    transform: scale(0.95);
}

.scale-btn svg {
    width: calc(18px * var(--scale-factor));
    height: calc(18px * var(--scale-factor));
    stroke: var(--text-primary);
    transition: all 0.3s ease;
}

.scale-btn:hover svg,
.scale-btn:focus svg {
    stroke: white;
}

.scale-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.scale-btn:disabled:hover {
    background: transparent;
    border-color: var(--border-primary);
}

.scale-btn:disabled svg {
    stroke: var(--text-muted);
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: 2px solid var(--border-primary);
    border-radius: calc(8px * var(--scale-factor));
    width: calc(44px * var(--scale-factor));
    height: calc(44px * var(--scale-factor));
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle:focus {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: scale(1.05);
    outline: none;
    z-index: 2;
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.hamburger-icon,
.close-icon {
    width: calc(18px * var(--scale-factor));
    height: calc(18px * var(--scale-factor));
    stroke: var(--text-primary);
    transition: all 0.3s ease;
    position: absolute;
}

.hamburger-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.close-icon {
    width: calc(22px * var(--scale-factor));
    height: calc(22px * var(--scale-factor));
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

.mobile-menu-toggle:hover .hamburger-icon,
.mobile-menu-toggle:focus .hamburger-icon,
.mobile-menu-toggle:hover .close-icon,
.mobile-menu-toggle:focus .close-icon {
    stroke: white;
}

.mobile-menu-toggle--open .hamburger-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

.mobile-menu-toggle--open .close-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.mobile-menu-toggle--open {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.mobile-menu-toggle--open .hamburger-icon,
.mobile-menu-toggle--open .close-icon {
    stroke: white;
}

/* ===== BUTTONS AND INTERACTIVE ELEMENTS ===== */

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: calc(0.875rem * var(--scale-factor)) calc(2rem * var(--scale-factor));
    border: none;
    border-radius: calc(8px * var(--scale-factor));
    font-weight: 600;
    font-size: calc(1rem * var(--scale-factor));
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(calc(-2px * var(--scale-factor)));
    box-shadow: var(--shadow-large);
    outline: none;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: calc(0.875rem * var(--scale-factor)) calc(2rem * var(--scale-factor));
    border: 2px solid var(--border-primary);
    border-radius: calc(8px * var(--scale-factor));
    font-weight: 600;
    font-size: calc(1rem * var(--scale-factor));
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(calc(-2px * var(--scale-factor)));
    outline: none;
}

.filter-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    padding: calc(0.5rem * var(--scale-factor)) calc(1.5rem * var(--scale-factor));
    border-radius: calc(8px * var(--scale-factor));
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: calc(0.875rem * var(--scale-factor));
}

.filter-btn.active,
.filter-btn:hover,
.filter-btn:focus {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    outline: none;
}

.filter-btn[aria-pressed="true"] {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

/* ===== HERO SECTION ===== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    padding-top: calc(200px * var(--scale-factor));
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(4rem * var(--scale-factor));
    align-items: center;
    z-index: 10;
}

.hero-text h1 {
    font-size: calc(3.5rem * var(--scale-factor));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: calc(1.5rem * var(--scale-factor));
    color: var(--text-primary);
}

.hero-text h1 .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

section h1,
article h1,
aside h1,
nav h1 {
    font-size: calc(3.5rem * var(--scale-factor));
}

.hero-subtitle {
    font-size: calc(1.25rem * var(--scale-factor));
    color: var(--accent-primary);
    margin-bottom: calc(1.5rem * var(--scale-factor));
    font-weight: 500;
}

.hero-subtitle span {
    color: var(--text-primary);
}

.hero-description {
    font-size: calc(1.125rem * var(--scale-factor));
    color: var(--text-secondary);
    margin-bottom: calc(2.5rem * var(--scale-factor));
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: calc(1rem * var(--scale-factor));
}

.hero-visual {
    position: relative;
    height: calc(500px * var(--scale-factor));
}

.profile-card {
    background: var(--bg-card);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: calc(16px * var(--scale-factor));
    padding: calc(2.5rem * var(--scale-factor));
    text-align: center;
    box-shadow: var(--shadow-large);
    transition: all 0.3s ease;
}

.profile-card:hover {
    transform: translateY(calc(-8px * var(--scale-factor)));
    box-shadow: var(--shadow-glow), var(--shadow-large);
}

.profile-image {
    width: calc(120px * var(--scale-factor));
    height: calc(120px * var(--scale-factor));
    border-radius: 50%;
    background: var(--gradient-primary);
    margin: 0 auto calc(1.5rem * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(2.5rem * var(--scale-factor));
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-medium);
}

.profile-card-image {
    width: 100%;
    height: auto;
    border-radius: calc(15px * var(--scale-factor));
}

.floating-icons {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.tech-icon {
    position: absolute;
    background: var(--bg-card);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-primary);
    border-radius: calc(12px * var(--scale-factor));
    padding: calc(0.75rem * var(--scale-factor));
    font-size: calc(1.25rem * var(--scale-factor));
    color: var(--accent-primary);
    animation: float 6s ease-in-out infinite;
    box-shadow: var(--shadow-soft);
}

.tech-icon:nth-child(1) {
    top: 6%;
    left: 3%;
    animation-delay: 0s;
}

.tech-icon:nth-child(2) {
    top: 10%;
    left: 9%;
    animation-delay: 1s;
}

.tech-icon:nth-child(3) {
    top: 5%;
    left: 17%;
    animation-delay: 2s;
}

.tech-icon:nth-child(4) {
    top: 9%;
    left: 24%;
    animation-delay: 3s;
}

/* ===== MAIN CONTENT SECTIONS ===== */

.about, .projects, .research, .contact, .technologies-tools {
    padding: calc(8rem * var(--scale-factor)) 0;
    position: relative;
}

.section-title {
    font-size: calc(2.5rem * var(--scale-factor));
    font-weight: 700;
    text-align: center;
    margin-bottom: calc(3rem * var(--scale-factor));
    color: var(--text-primary);
}

.section-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(4rem * var(--scale-factor));
    align-items: center;
}

.about-text {
    font-size: calc(1.125rem * var(--scale-factor));
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: calc(1.5rem * var(--scale-factor));
}

.about-text ul {
    color: var(--text-secondary);
    margin: calc(1rem * var(--scale-factor)) 0;
    padding-left: calc(2rem * var(--scale-factor));
}

.about-text h3 {
    color: var(--accent-primary);
    margin-bottom: calc(1rem * var(--scale-factor));
    margin-top: calc(2rem * var(--scale-factor));
    font-size: calc(1.5rem * var(--scale-factor));
}

.about-text h3:first-child {
    margin-top: 0;
}

.text-highlight {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ===== CARDS AND STATISTICS ===== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: calc(1.5rem * var(--scale-factor));
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: calc(1.5rem * var(--scale-factor));
    font-style: normal;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: calc(12px * var(--scale-factor));
    padding: calc(1.5rem * var(--scale-factor));
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(calc(-4px * var(--scale-factor)));
    box-shadow: var(--shadow-glow), var(--shadow-medium);
}

.stat-number {
    font-size: calc(2rem * var(--scale-factor));
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: calc(0.5rem * var(--scale-factor));
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: calc(0.875rem * var(--scale-factor));
}

.stat-card h3 {
    color: var(--accent-primary);
    margin-bottom: calc(1rem * var(--scale-factor));
    text-decoration: none;
    font-size: calc(1.5rem * var(--scale-factor));
}

.stat-card h4 {
    color: var(--accent-primary);
    margin-bottom: calc(1rem * var(--scale-factor));
    font-size: calc(1rem * var(--scale-factor));
}

.stat-card a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: calc(1rem * var(--scale-factor));
}

.stat-card a:hover,
.stat-card a:focus {
    color: var(--accent-primary);
    outline: none;
}

.stat-card p, .stat-card a {
    font-style: normal;
    text-decoration: none;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: calc(1rem * var(--scale-factor));
    margin-top: calc(0.25rem * var(--scale-factor));
    margin-bottom: calc(0.25rem * var(--scale-factor));
}

.contact-icon {
    width: calc(48px * var(--scale-factor));
    height: calc(48px * var(--scale-factor));
    color: var(--accent-primary);
    flex-shrink: 0;
    margin-top: calc(0.25rem * var(--scale-factor));
    padding-left: calc(0.25rem * var(--scale-factor));
}

.linkedin-icon {
    transform: scale(1.1);
    margin-bottom: calc(0.1rem * var(--scale-factor));
}

.contact-content {
    flex: 1;
    min-width: 0;
    text-align: center;
}

.contact-item-header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(0.5rem * var(--scale-factor));
    margin-bottom: calc(0.5rem * var(--scale-factor));
}

.contact-item-header h3 {
    margin: 0;
    line-height: 1.2;
    font-size: calc(1.3rem * var(--scale-factor));
}

.contact-content > h3 {
    margin: 0 0 calc(0.5rem * var(--scale-factor)) 0;
    line-height: 1.2;
}

.contact-content p {
    margin: 0;
    line-height: 1.4;
}

.contact-content a {
    word-break: break-all;
    font-size: calc(0.875rem * var(--scale-factor));
}

.copy-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.copy-text {
    flex-grow: 1;
    text-align: center;
    padding: 0 calc(0.5rem * var(--scale-factor));
}

.copy-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    margin-bottom: calc(0.1rem * var(--scale-factor));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.copy-icon:hover, .copy-icon:active {
    color: var(--accent-primary);
    transform: scale(1.1);
}

.copy-icon svg {
    width: calc(20px * var(--scale-factor));
    height: calc(20px * var(--scale-factor));
}

/* ===== TECHNOLOGIES AND SKILLS ===== */

.technologies-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(3rem * var(--scale-factor));
    margin-top: calc(4rem * var(--scale-factor));
}

.skill-category {
    background: var(--bg-card);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: calc(16px * var(--scale-factor));
    transition: all 0.3s ease;
    overflow: hidden;
}

.skill-category:hover {
    transform: translateY(calc(-4px * var(--scale-factor)));
    box-shadow: var(--shadow-glow), var(--shadow-medium);
}

.skill-category-header {
    height: calc(80px * var(--scale-factor));
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(1.25rem * var(--scale-factor));
    color: white;
    position: relative;
    overflow: hidden;
    font-weight: 600;
    padding: calc(1rem * var(--scale-factor));
    text-align: center;
}

.skill-category-content {
    padding: calc(1.5rem * var(--scale-factor));
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: calc(0.5rem * var(--scale-factor));
}

.skill-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    padding: calc(0.25rem * var(--scale-factor)) calc(0.75rem * var(--scale-factor));
    border-radius: calc(6px * var(--scale-factor));
    font-size: calc(0.75rem * var(--scale-factor));
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(calc(-1px * var(--scale-factor)));
}

/* ===== PROJECTS ===== */

.projects-filter {
    display: flex;
    justify-content: center;
    gap: calc(1rem * var(--scale-factor));
    margin-bottom: calc(4rem * var(--scale-factor));
    flex-wrap: wrap;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: calc(2rem * var(--scale-factor));
}

.research-projects-grid {
    margin-top: calc(4rem * var(--scale-factor));
}

.project-card {
    background: var(--bg-card);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: calc(16px * var(--scale-factor));
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.project-card--hidden {
    display: none;
}

.project-card--visible {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}

.project-card:hover,
.project-card:focus-within {
    transform: translateY(calc(-8px * var(--scale-factor)));
    box-shadow: var(--shadow-glow), var(--shadow-large);
}

.project-image {
    height: calc(100px * var(--scale-factor));
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(1.25rem * var(--scale-factor));
    color: white;
    position: relative;
    overflow: hidden;
    font-weight: 600;
    padding: calc(1rem * var(--scale-factor));
    text-align: center;
}

.project-content {
    padding: calc(1.5rem * var(--scale-factor));
    display: flex;
    flex-direction: column;
    gap: calc(1rem * var(--scale-factor));
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: calc(0.5rem * var(--scale-factor));
    line-height: 1.6;
    font-size: calc(0.875rem * var(--scale-factor));
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: calc(0.5rem * var(--scale-factor));
    margin-top: auto;
    margin-bottom: 0;
}

.project-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    padding: calc(0.25rem * var(--scale-factor)) calc(0.75rem * var(--scale-factor));
    border-radius: calc(6px * var(--scale-factor));
    font-size: calc(0.75rem * var(--scale-factor));
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.3s ease;
}

.project-tag:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(calc(-1px * var(--scale-factor)));
}

.project-responsibilities {
    margin: calc(0.5rem * var(--scale-factor)) 0;
}

.project-responsibilities h4 {
    color: var(--accent-primary);
    font-size: calc(0.875rem * var(--scale-factor));
    font-weight: 600;
    margin-bottom: calc(0.75rem * var(--scale-factor));
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.project-responsibilities ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.project-responsibilities li {
    color: var(--text-secondary);
    font-size: calc(0.8rem * var(--scale-factor));
    line-height: 1.5;
    margin-bottom: calc(0.5rem * var(--scale-factor));
    padding-left: calc(1rem * var(--scale-factor));
    position: relative;
}

.project-responsibilities li:before {
    content: '•';
    color: var(--accent-primary);
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

.project-responsibilities li:last-child {
    margin-bottom: 0;
}

/* ===== GAME CONTAINER AND CONTROLS ===== */

.game-container {
    position: fixed;
    bottom: calc(2rem * var(--scale-factor));
    right: calc(2rem * var(--scale-factor));
    z-index: 1000;
}

.game-toggle {
    background: var(--gradient-primary);
    border: none;
    border-radius: calc(12px * var(--scale-factor));
    width: calc(75px * var(--scale-factor));
    height: calc(55px * var(--scale-factor));
    color: white;
    font-size: calc(1.25rem * var(--scale-factor));
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: subtle-glow 3s infinite ease-in-out;
}

.game-toggle.no-animation {
    animation: none;
}

.game-toggle:hover,
.game-toggle:focus {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow), var(--shadow-medium);
    outline: none;
}

.game-toggle:active {
    transform: scale(1);
}

.game-toggle svg {
    width: calc(60px * var(--scale-factor));
    height: calc(60px * var(--scale-factor));
    transition: all 0.3s ease;
}

.game-icon-background {
    fill: white;
}

.game-icon-dpad,
.game-icon-dots {
    fill: var(--accent-primary);
}

.game-area {
    position: absolute;
    bottom: calc(70px * var(--scale-factor));
    right: 0;
    width: calc(340px * var(--scale-factor));
    height: calc(520px * var(--scale-factor));
    background: rgba(17, 24, 39, 0.9);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: calc(2px * var(--scale-factor)) solid var(--game-border-color);
    border-radius: calc(16px * var(--scale-factor));
    padding: calc(1.5rem * var(--scale-factor));
    display: none;
    overflow: hidden;
    box-shadow: 0 0 calc(10px * var(--scale-factor)) var(--game-border-glow), var(--shadow-large);
    flex-direction: column;
}

.game-area.active {
    display: flex;
    animation: slideIn 0.3s ease;
}

[data-theme="light"] .game-area {
    background: rgba(240, 235, 228, 0.9);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.game-header {
    margin-top: calc(0.25rem * var(--scale-factor));
}

.game-title-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(0.5rem * var(--scale-factor));
    margin-bottom: calc(0.75rem * var(--scale-factor));
    margin-top: calc(0.25rem * var(--scale-factor));
}

.game-title {
    font-family: 'Audiowide', sans-serif;
    font-size: calc(1.6rem * var(--scale-factor));
    font-weight: 400;
    color: var(--text-primary);
    line-height: 1.2;
}

.info-icon {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    width: calc(25px * var(--scale-factor));
    height: calc(25px * var(--scale-factor));
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: calc(0.8rem * var(--scale-factor));
    font-weight: bold;
    cursor: pointer;
    border: 1px solid var(--border-primary);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.info-icon:hover,
.info-icon:focus {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.1);
    outline: none;
}

.game-stats {
    display: flex;
    justify-content: space-between;
    font-size: calc(0.875rem * var(--scale-factor));
    margin-left: calc(5px * var(--scale-factor));
    margin-right: calc(5px * var(--scale-factor));
    margin-top: calc(15px * var(--scale-factor));
}

.game-score {
    color: var(--accent-secondary);
    font-weight: 600;
}

.game-timer {
    color: var(--accent-warning);
    font-weight: 600;
}

.game-level {
    color: var(--accent-tertiary);
    font-weight: 600;
}

.game-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.game-controls {
    margin-top: calc(1rem * var(--scale-factor));
    margin-bottom: calc(0.2rem * var(--scale-factor));
    display: flex;
    justify-content: space-between;
}

.game-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: calc(0.5rem * var(--scale-factor)) calc(1rem * var(--scale-factor));
    border-radius: calc(6px * var(--scale-factor));
    font-weight: 500;
    font-size: calc(0.875rem * var(--scale-factor));
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0 calc(0.25rem * var(--scale-factor));
}

.game-btn:hover,
.game-btn:focus {
    transform: translateY(calc(-1px * var(--scale-factor)));
    box-shadow: var(--shadow-medium);
    outline: none;
}

.game-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

.game-btn--large,
#restartBtn {
    padding: calc(1rem * var(--scale-factor)) calc(2.5rem * var(--scale-factor));
    font-size: calc(1.25rem * var(--scale-factor));
    font-weight: 600;
}

/* ===== GAME UI ELEMENTS ===== */

.game-canvas {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: calc(1.8rem * var(--scale-factor));
    cursor: crosshair;
    position: relative;
    margin-top: calc(1rem * var(--scale-factor));
}

.pool-wrapper {
    margin-top: calc(20px * var(--scale-factor));
    flex: 1;
    position: relative;
    border: 1px solid var(--border-primary);
    border-radius: calc(8px * var(--scale-factor));
    background: rgba(10, 14, 26, 0.3);
}

.blockchain-wrapper {
    height: calc(64px * var(--scale-factor));
    position: relative;
    border: 1px solid var(--border-primary);
    border-radius: calc(8px * var(--scale-factor));
    background: rgba(10, 14, 26, 0.3);
}

[data-theme="light"] .pool-wrapper,
[data-theme="light"] .blockchain-wrapper {
    background: rgba(250, 248, 245, 0.5);
}

.transaction-pool {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    padding: calc(5px * var(--scale-factor));
}

.blockchain-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    gap: calc(5px * var(--scale-factor));
    overflow-x: auto;
    padding: calc(8px * var(--scale-factor));
    align-items: center;
}

.blockchain-container::-webkit-scrollbar {
    height: calc(4px * var(--scale-factor));
}

.blockchain-container::-webkit-scrollbar-track {
    background: rgba(31, 41, 55, 0.5);
    border-radius: calc(2px * var(--scale-factor));
}

.blockchain-container::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: calc(2px * var(--scale-factor));
}

.area-label {
    position: absolute;
    top: calc(-20px * var(--scale-factor));
    left: calc(8px * var(--scale-factor));
    font-size: calc(0.75rem * var(--scale-factor));
    color: var(--text-muted);
    font-weight: 500;
    background: transparent;
    padding: 0 calc(4px * var(--scale-factor));
    z-index: 1;
}

.blockchain-transaction {
    position: absolute;
    width: calc(40px * var(--scale-factor));
    height: calc(40px * var(--scale-factor));
    border-radius: calc(8px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(1rem * var(--scale-factor));
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-soft);
    animation: transactionSpawn 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.blockchain-transaction--processed {
    background: var(--accent-secondary);
    transform: scale(1.2);
}

.blockchain-transaction:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
}

.transaction-fade-out {
    animation: transactionFadeOut 0.25s ease forwards !important;
}

.blockchain-block {
    min-width: calc(42px * var(--scale-factor));
    height: calc(42px * var(--scale-factor));
    background: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    border-radius: calc(8px * var(--scale-factor));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: calc(0.55rem * var(--scale-factor));
    color: white;
    font-weight: 600;
    position: relative;
    animation: blockCreate 0.5s ease;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.blockchain-block--genesis {
    background: var(--accent-secondary);
}

.blockchain-block--full {
    background: var(--accent-secondary);
}

.blockchain-block--half-full {
    background: var(--accent-warning);
}

.blockchain-block--finalized {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.blockchain-block,
.blockchain-block div,
.blockchain-block .tx-count,
.blockchain-block--genesis,
.blockchain-block--full,
.blockchain-block--half-full,
.blockchain-block--finalized {
    color: white !important;
}

/* ===== GAME SCREENS AND MODALS ===== */

.game-intro, .game-end {
    position: absolute;
    top: -15px;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
    background: transparent;
    text-align: center;
    z-index: 10;
    animation: fadeIn 0.5s ease;
}

.game-end {
    display: none;
}

.game-intro-demo {
    background: rgba(10, 14, 26, 0.3);
    border: 1px solid var(--border-primary);
    border-radius: calc(12px * var(--scale-factor));
    padding-top: calc(1.5rem * var(--scale-factor));
    padding-left: calc(1.5rem * var(--scale-factor));
    padding-right: calc(1.5rem * var(--scale-factor));
    padding-bottom: calc(0.75rem * var(--scale-factor));
    margin-bottom: calc(0.75rem * var(--scale-factor));
}

[data-theme="light"] .game-intro-demo {
    background: rgba(218, 214, 207, 0.5);
}

.demo-step {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: calc(0.75rem * var(--scale-factor));
    margin-bottom: calc(1rem * var(--scale-factor));
}

.demo-icon {
    width: calc(40px * var(--scale-factor));
    height: calc(40px * var(--scale-factor));
    border-radius: calc(8px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(1.2rem * var(--scale-factor));
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
}

.demo-transaction {
    background: var(--accent-primary);
    animation: demoFloat 2s ease-in-out infinite;
}

.demo-block {
    background: var(--accent-secondary);
    animation: demoFloat 2s ease-in-out infinite 0.5s;
}

.demo-chain {
    background: var(--accent-tertiary);
    animation: demoFloat 2s ease-in-out infinite 1s;
}

.demo-arrow {
    color: var(--accent-primary);
    font-size: calc(1.2rem * var(--scale-factor));
    font-weight: bold;
    animation: arrowPulse 1.5s ease-in-out infinite;
}

.demo-labels {
    display: flex;
    justify-content: space-between;
    font-size: calc(0.75rem * var(--scale-factor));
    color: var(--text-secondary);
    font-weight: 500;
    padding-left: calc(0.35rem * var(--scale-factor));
    padding-right: calc(0.25rem * var(--scale-factor));
}

.game-intro-features {
    display: flex;
    flex-direction: column;
    gap: calc(0.75rem * var(--scale-factor));
    margin-bottom: calc(1rem * var(--scale-factor));
}

.feature-item {
    display: flex;
    align-items: center;
    gap: calc(0.75rem * var(--scale-factor));
    padding: calc(0.5rem * var(--scale-factor));
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: calc(8px * var(--scale-factor));
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateX(calc(4px * var(--scale-factor)));
}

.feature-icon {
    font-size: calc(1.1rem * var(--scale-factor));
    width: calc(24px * var(--scale-factor));
    text-align: center;
}

.feature-item span {
    font-size: calc(0.85rem * var(--scale-factor));
    color: var(--text-secondary);
    font-weight: 500;
}

.game-btn--start {
    background: var(--gradient-primary);
    color: white;
    padding: calc(1rem * var(--scale-factor)) calc(2rem * var(--scale-factor));
    border-radius: calc(12px * var(--scale-factor));
    border: none;
    font-size: calc(1.1rem * var(--scale-factor));
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: calc(0.5rem * var(--scale-factor));
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.game-btn--start::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.game-btn--start:hover::before {
    left: 100%;
}

.game-btn--start:hover,
.game-btn--start:focus {
    transform: translateY(calc(-2px * var(--scale-factor))) scale(1.02);
    box-shadow: var(--shadow-glow), var(--shadow-large);
    outline: none;
}

.game-btn--start svg {
    transition: transform 0.3s ease;
}

.game-btn--start:hover svg {
    transform: translateX(calc(4px * var(--scale-factor)));
}

.game-end-score {
    font-size: calc(2rem * var(--scale-factor));
    color: var(--accent-primary);
    margin-bottom: calc(1.5rem * var(--scale-factor));
    font-weight: 700;
    text-shadow: 0 0 calc(10px * var(--scale-factor)) rgba(59, 130, 246, 0.5);
}

.game-end-icon {
    width: calc(60px * var(--scale-factor));
    height: calc(60px * var(--scale-factor));
    margin: 0 auto calc(1rem * var(--scale-factor));
    background: var(--gradient-secondary);
    border-radius: calc(16px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-medium);
    animation: victoryPulse 1.5s ease-in-out infinite;
}

.game-end-icon svg {
    width: calc(32px * var(--scale-factor));
    height: calc(32px * var(--scale-factor));
}

.game-end-title {
    font-size: calc(1.4rem * var(--scale-factor));
    font-weight: 700;
    color: var(--accent-secondary);
    margin: 0 0 calc(1.5rem * var(--scale-factor)) 0;
    text-align: center;
}

.game-end-stats {
    background: rgba(10, 14, 26, 0.4);
    border: 1px solid var(--border-primary);
    border-radius: calc(12px * var(--scale-factor));
    padding: calc(1em * var(--scale-factor)) calc(1.5em * var(--scale-factor));
    display: flex;
    flex-direction: column;
    gap: calc(0.75rem * var(--scale-factor));
    width: 100%;
    color: var(--text-secondary);
    font-size: calc(0.875rem * var(--scale-factor));
}

[data-theme="light"] .game-end-stats {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-primary) !important;
}

[data-theme="light"] .game-end-stats p {
    color: var(--text-primary) !important;
}

[data-theme="light"] .game-end-stats span {
    color: var(--accent-primary) !important;
    font-weight: 700;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(0.5rem * var(--scale-factor)) 0;
    border-bottom: 1px solid var(--border-primary);
    font-size: calc(0.9rem * var(--scale-factor));
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row span:first-child {
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: calc(1.1rem * var(--scale-factor));
}

.game-btn--restart {
    background: var(--gradient-secondary);
    color: white;
    padding: calc(1rem * var(--scale-factor)) calc(2rem * var(--scale-factor));
    border-radius: calc(12px * var(--scale-factor));
    border: none;
    font-size: calc(1rem * var(--scale-factor));
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: calc(0.5rem * var(--scale-factor));
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-medium);
    margin: 0 auto;
}

.game-btn--restart:hover,
.game-btn--restart:focus {
    transform: translateY(calc(-2px * var(--scale-factor)));
    box-shadow: var(--shadow-large);
    outline: none;
}

.game-rules-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.game-rules-modal-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

.game-rules-modal {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: calc(20px * var(--scale-factor));
    padding: calc(2.5rem * var(--scale-factor));
    width: 90%;
    max-width: calc(500px * var(--scale-factor));
    box-shadow: var(--shadow-large);
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
    -webkit-backdrop-filter: blur(30px);
    backdrop-filter: blur(30px);
}

.game-rules-modal-backdrop.active .game-rules-modal {
    transform: scale(1);
}

.game-rules-modal h4 {
    color: var(--accent-primary);
    font-size: calc(1.5rem * var(--scale-factor));
    margin-bottom: calc(2rem * var(--scale-factor));
    text-align: center;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.game-rules-modal p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: calc(2rem * var(--scale-factor));
    font-size: calc(1rem * var(--scale-factor));
}

.modal-close-btn {
    position: absolute;
    top: calc(1rem * var(--scale-factor));
    right: calc(1rem * var(--scale-factor));
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: calc(1.5rem * var(--scale-factor));
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close-btn:hover,
.modal-close-btn:focus {
    color: var(--text-primary);
    outline: none;
}

.rules-section {
    padding-left: calc(1.5rem * var(--scale-factor));
    margin-bottom: calc(1.5rem * var(--scale-factor));
}

.rules-step {
    display: flex;
    align-items: flex-start;
    gap: calc(1rem * var(--scale-factor));
    margin-bottom: calc(1rem * var(--scale-factor));
}

.rules-step:last-child {
    margin-bottom: 0;
}

.rules-step-icon {
    width: calc(40px * var(--scale-factor));
    height: calc(40px * var(--scale-factor));
    background: var(--accent-primary);
    border-radius: calc(8px * var(--scale-factor));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(1.2rem * var(--scale-factor));
    flex-shrink: 0;
    color: white;
    font-weight: bold;
    margin-top: calc(0.25rem * var(--scale-factor));
}

.rules-step-content {
    flex: 1;
}

.rules-step-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: calc(0.25rem * var(--scale-factor));
    font-size: calc(0.95rem * var(--scale-factor));
}

.rules-step-desc {
    color: var(--text-secondary);
    font-size: calc(0.85rem * var(--scale-factor));
    line-height: 1.5;
}

/* ===== LOADING SCREEN AND FOOTER ===== */

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading--hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: calc(50px * var(--scale-factor));
    height: calc(50px * var(--scale-factor));
    border: calc(2px * var(--scale-factor)) solid rgba(59, 130, 246, 0.2);
    border-top: calc(2px * var(--scale-factor)) solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

[data-theme="light"] .loading {
    background: var(--bg-primary);
}

[data-theme="light"] .loading-spinner {
    border: calc(2px * var(--scale-factor)) solid rgba(37, 99, 235, 0.2);
    border-top: calc(2px * var(--scale-factor)) solid var(--accent-primary);
}

.footer {
    background: var(--bg-secondary);
    padding: calc(1rem * var(--scale-factor)) 0;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border-primary);
}

.footer p {
    margin-bottom: calc(0.2rem * var(--scale-factor));
    font-size: calc(0.75rem * var(--scale-factor));
}

/* ===== UTILITY CLASSES AND EFFECTS ===== */

.fade-in {
    opacity: 0;
    transform: translateY(calc(30px * var(--scale-factor)));
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.level-up-msg {
    position: absolute;
    top: 50%;
    left: 20%;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: calc(1rem * var(--scale-factor));
    pointer-events: none;
    animation: bonusFloat 2s ease-out forwards;
    background: var(--bg-secondary);
    padding: calc(0.5rem * var(--scale-factor));
    border-radius: calc(8px * var(--scale-factor));
    border: 1px solid var(--accent-primary);
    z-index: 1000;
}

.points-earned {
    position: absolute;
    left: 50%;
    top: calc(-10px * var(--scale-factor));
    transform: translateX(-50%);
    color: #10b981;
    font-weight: bold;
    font-size: calc(0.7rem * var(--scale-factor));
    pointer-events: none;
    animation: bonusFloat 1.5s ease-out forwards;
    background: rgba(10, 14, 26, 0.8);
    padding: calc(0.2rem * var(--scale-factor)) calc(0.4rem * var(--scale-factor));
    border-radius: calc(4px * var(--scale-factor));
    white-space: nowrap;
}

.points-earned--bonus {
    color: #f59e0b;
    font-size: calc(0.8rem * var(--scale-factor));
}

/* ===== COLOR OVERRIDES ===== */

.btn-secondary:hover,
.btn-secondary:focus,
.filter-btn.active,
.filter-btn:hover,
.filter-btn:focus,
.theme-toggle:hover,
.theme-toggle:focus,
.scale-btn:hover,
.scale-btn:focus {
    color: white !important;
}

.btn-primary,
.game-btn,
.skill-category-header,
.project-image {
    color: white;
}

[style*="background: var(--accent-primary)"],
[style*="background-color: var(--accent-primary)"],
[style*="background: var(--gradient-primary)"],
[style*="background: var(--gradient-secondary)"],
[style*="background: var(--gradient-accent)"] {
    color: white !important;
}

[data-theme="light"] .btn-secondary:hover,
[data-theme="light"] .btn-secondary:focus,
[data-theme="light"] .filter-btn.active,
[data-theme="light"] .filter-btn:hover,
[data-theme="light"] .filter-btn:focus {
    color: white !important;
}

[data-theme="light"] .theme-toggle:hover svg,
[data-theme="light"] .theme-toggle:focus svg {
    fill: white !important;
}

[data-theme="light"] .scale-btn:hover svg,
[data-theme="light"] .scale-btn:focus svg {
    stroke: white !important;
}

/* ===== ANIMATIONS AND KEYFRAMES ===== */

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(calc(-20px * var(--scale-factor))) rotate(5deg);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(calc(20px * var(--scale-factor)));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bonusFloat {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(calc(-50px * var(--scale-factor))) scale(1.2);
        opacity: 0;
    }
}

@keyframes transactionSpawn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes transactionFadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes blockCreate {
    from {
        transform: scale(0) rotateY(180deg);
        opacity: 0;
    }
    to {
        transform: scale(1) rotateY(0deg);
        opacity: 1;
    }
}

@keyframes blockSpawn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes blockMined {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.1);
        box-shadow: 0 0 calc(20px * var(--scale-factor)) var(--accent-secondary);
    }
    50% {
        transform: scale(1.05);
    }
    75% {
        transform: scale(1.1);
        box-shadow: 0 0 calc(20px * var(--scale-factor)) var(--accent-secondary);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: var(--shadow-soft);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 0 calc(20px * var(--scale-factor)) rgba(245, 158, 11, 0.5);
    }
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: var(--shadow-medium);
    }
    50% {
        transform: scale(1.05);
        box-shadow: var(--shadow-glow), var(--shadow-medium);
    }
}

@keyframes demoFloat {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(calc(-8px * var(--scale-factor))) scale(1.1);
    }
}

@keyframes arrowPulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes victoryPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes subtle-glow {
    0%, 100% {
        box-shadow: var(--shadow-medium);
    }
    50% {
        box-shadow: 0 0 20px rgba(59, 130, 246)
    }
}

/* ===== TOUCH AND SAFARI OPTIMIZATIONS ===== */

/* Disable hover effects on touch devices to prevent sticky hover */
.touch-device .theme-toggle:hover,
.touch-device .scale-btn:hover,
.touch-device .mobile-menu-toggle:hover,
.touch-device .nav-link:hover,
.touch-device .filter-btn:hover,
.touch-device .filter-btn:hover {
    background: transparent;
    border-color: var(--border-primary);
    color: var(--text-secondary);
    transform: none;
}

.touch-device .nav-link:hover::after {
    width: 0;
}

.touch-device .theme-toggle:hover svg {
    fill: var(--text-primary);
}

.touch-device .scale-btn:hover svg {
    stroke: var(--text-primary);
}

/* Style for active touch state */
.touch-active {
    background: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
    color: white !important;
    transform: scale(1.05) !important;
}

.touch-active svg {
    fill: white !important;
    stroke: white !important;
}

.ios-safari .theme-toggle,
.ios-safari .scale-btn,
.ios-safari .mobile-menu-toggle {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.ios-safari .theme-toggle:hover,
.ios-safari .scale-btn:hover,
.ios-safari .mobile-menu-toggle:hover {
    background: transparent !important;
    border-color: var(--border-primary) !important;
    transform: none !important;
    z-index: auto !important;
}

.ios-safari .theme-toggle:hover svg,
.ios-safari .scale-btn:hover svg,
.ios-safari .mobile-menu-toggle:hover .hamburger-icon,
.ios-safari .mobile-menu-toggle:hover .close-icon {
    fill: var(--text-primary) !important;
    stroke: var(--text-primary) !important;
}

.ios-safari .theme-toggle:active,
.ios-safari .scale-btn:active,
.ios-safari .mobile-menu-toggle:active {
    background: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
    transform: scale(1.05) !important;
    z-index: 2 !important;
    transition: all 0.3s ease !important;
}

.ios-safari .theme-toggle:active svg,
.ios-safari .scale-btn:active svg,
.ios-safari .mobile-menu-toggle:active .hamburger-icon,
.ios-safari .mobile-menu-toggle:active .close-icon {
    fill: white !important;
    stroke: white !important;
}

.ios-safari .theme-toggle:focus,
.ios-safari .scale-btn:focus,
.ios-safari .mobile-menu-toggle:focus {
    outline: none !important;
}

.ios-safari .mobile-menu-toggle--open {
    background: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.ios-safari .mobile-menu-toggle--open .hamburger-icon,
.ios-safari .mobile-menu-toggle--open .close-icon {
    stroke: white !important;
}

.theme-toggle:not(:hover):not(:active):not(:focus-visible),
.scale-btn:not(:hover):not(:active):not(:focus-visible),
.mobile-menu-toggle:not(:hover):not(:active):not(:focus-visible):not(.mobile-menu-toggle--open) {
    background: transparent !important;
    border-color: var(--border-primary) !important;
    transform: none !important;
    z-index: auto !important;
}

.theme-toggle:not(:hover):not(:active):not(:focus-visible) svg,
.scale-btn:not(:hover):not(:active):not(:focus-visible) svg,
.mobile-menu-toggle:not(:hover):not(:active):not(:focus-visible):not(.mobile-menu-toggle--open) .hamburger-icon,
.mobile-menu-toggle:not(:hover):not(:active):not(:focus-visible):not(.mobile-menu-toggle--open) .close-icon {
    fill: var(--text-primary) !important;
    stroke: var(--text-primary) !important;
}

.mobile-menu-toggle--open {
    background: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.mobile-menu-toggle--open .hamburger-icon,
.mobile-menu-toggle--open .close-icon {
    stroke: white !important;
}

.ios-safari .mobile-menu-toggle--open,
.ios-safari .mobile-menu-toggle--open:hover,
.ios-safari .mobile-menu-toggle--open:active {
    background: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.ios-safari .mobile-menu-toggle--open .hamburger-icon,
.ios-safari .mobile-menu-toggle--open .close-icon,
.ios-safari .mobile-menu-toggle--open:hover .hamburger-icon,
.ios-safari .mobile-menu-toggle--open:hover .close-icon,
.ios-safari .mobile-menu-toggle--open:active .hamburger-icon,
.ios-safari .mobile-menu-toggle--open:active .close-icon {
    stroke: white !important;
}

/* ===== ACCESSIBILITY AND PERFORMANCE ===== */

@media (prefers-contrast: high) {
    :root {
        --border-primary: rgba(59, 130, 246, 0.5);
        --shadow-glow: 0 0 calc(20px * var(--scale-factor)) rgba(59, 130, 246, 0.3);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== MEDIA QUERIES ===== */

@media (max-width: 1024px) {
    #about .stats-grid,
    #research .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .floating-icons {
        display: none;
    }

    .hero {
        padding: calc(110px * var(--scale-factor)) 0 calc(60px * var(--scale-factor));
    }

    .hero-visual {
        height: auto;
        margin-bottom: calc(2rem * var(--scale-factor));
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: calc(3rem * var(--scale-factor));
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: calc(3rem * var(--scale-factor));
    }

    .stats-grid {
        grid-template-columns: repeat(1, 1fr);
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .technologies-tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .contact-item {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: calc(0.5rem * var(--scale-factor)) calc(1rem * var(--scale-factor));
        margin-top: 0;
        margin-bottom: calc(0.3rem * var(--scale-factor));
    }

    .contact-content {
        display: contents;
    }

    .contact-content h3 {
        margin-top: calc(0.9rem * var(--scale-factor));
    }

    .contact-content p {
        flex-basis: 100%;
        text-align: center;
    }

    .theme-toggle,
    .scale-btn {
        width: calc(40px * var(--scale-factor));
        height: calc(40px * var(--scale-factor));
    }

    .nav-controls {
        margin-right: calc(0.5rem * var(--scale-factor));
    }

    .theme-toggle svg {
        width: calc(18px * var(--scale-factor));
        height: calc(18px * var(--scale-factor));
    }

    .scale-btn svg {
        width: calc(16px * var(--scale-factor));
        height: calc(16px * var(--scale-factor));
    }

    .contact-icon {
        width: calc(40px * var(--scale-factor));
        height: calc(40px * var(--scale-factor));
    }

    .contact-item {
        gap: calc(0.75rem * var(--scale-factor));
    }

    .container {
        padding: 0 calc(1rem * var(--scale-factor));
    }

    .nav-container {
        padding: calc(1rem * var(--scale-factor));
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        height: calc(100vh - 100%);
        background: var(--bg-primary);
        padding: calc(2rem * var(--scale-factor));
        gap: calc(1.5rem * var(--scale-factor));
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 999;
        text-align: right;
    }

    .nav-links--open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: calc(1.25rem * var(--scale-factor));
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .mobile-menu-toggle--open span:nth-child(1) {
        transform: rotate(45deg) translate(calc(6px * var(--scale-factor)), calc(6px * var(--scale-factor)));
    }

    .mobile-menu-toggle--open span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle--open span:nth-child(3) {
        transform: rotate(-45deg) translate(calc(6px * var(--scale-factor)), calc(-6px * var(--scale-factor)));
    }

    .hero-text h1 {
        font-size: calc(2.5rem * var(--scale-factor));
    }

    .hero-subtitle {
        font-size: calc(1.125rem * var(--scale-factor));
    }

    .section-title {
        font-size: calc(2rem * var(--scale-factor));
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: calc(0.75rem * var(--scale-factor));
    }

    .game-container {
        bottom: calc(1rem * var(--scale-factor));
        right: calc(1rem * var(--scale-factor));
    }

    .technologies-tools-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .projects-filter {
        flex-wrap: wrap;
        gap: calc(0.5rem * var(--scale-factor));
    }

    .filter-btn {
        padding: calc(0.5rem * var(--scale-factor)) calc(1rem * var(--scale-factor));
        font-size: calc(0.8rem * var(--scale-factor));
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        min-width: unset;
    }

    .contact-content a {
        font-size: calc(0.8rem * var(--scale-factor));
    }

    .demo-icon {
        width: calc(35px * var(--scale-factor));
        height: calc(35px * var(--scale-factor));
        font-size: calc(1rem * var(--scale-factor));
    }

    .demo-labels {
        font-size: calc(0.7rem * var(--scale-factor));
    }

    .feature-item {
        padding: calc(0.5rem * var(--scale-factor));
    }

    .game-rules-modal {
        padding: calc(2rem * var(--scale-factor));
        max-width: calc(400px * var(--scale-factor));
    }

    .copy-icon {
        margin-top: calc(0.75rem * var(--scale-factor));
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: calc(2rem * var(--scale-factor));
    }

    .section-title {
        font-size: calc(1.75rem * var(--scale-factor));
    }

    .about-text {
        font-size: calc(1rem * var(--scale-factor));
    }
}

/* ===== CUSTOM SCROLLBARS ===== */

::-webkit-scrollbar {
    width: calc(6px * var(--scale-factor));
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: calc(3px * var(--scale-factor));
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ===== GAME BACKGROUND IMPROVEMENTS ===== */

.game-area {
    background: linear-gradient(135deg,
    rgba(17, 24, 39, 0.96) 0%,
    rgba(20, 31, 48, 0.93) 25%,
    rgba(15, 23, 42, 0.90) 50%,
    rgba(22, 33, 51, 0.93) 75%,
    rgba(17, 24, 39, 0.96) 100%) !important;
    -webkit-backdrop-filter: blur(25px) !important;
    backdrop-filter: blur(25px) !important;
    border: calc(1px * var(--scale-factor)) solid rgba(255, 255, 255, 0.15) !important;
    box-shadow:
            0 0 calc(30px * var(--scale-factor)) rgba(59, 130, 246, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.2),
            inset 0 -1px 0 rgba(255, 255, 255, 0.1),
            0 20px 40px rgba(0, 0, 0, 0.3) !important;
}

.game-area::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
            radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
            radial-gradient(circle at 75% 75%, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

[data-theme="light"] .game-area {
    background: linear-gradient(135deg,
    rgba(240, 235, 228, 0.95) 0%,
    rgba(230, 221, 212, 0.90) 25%,
    rgba(250, 248, 245, 0.95) 50%,
    rgba(230, 221, 212, 0.90) 75%,
    rgba(240, 235, 228, 0.95) 100%) !important;
    border: calc(1px * var(--scale-factor)) solid rgba(59, 130, 246, 0.2) !important;
    box-shadow:
            0 0 calc(30px * var(--scale-factor)) rgba(59, 130, 246, 0.4),
            inset 0 1px 0 rgba(255, 255, 255, 0.4),
            inset 0 -1px 0 rgba(255, 255, 255, 0.2),
            0 20px 40px rgba(0, 0, 0, 0.15) !important;
}

.game-header,
.game-body,
.game-controls,
.game-intro,
.game-end {
    position: relative;
    z-index: 3;
}