:root {
    color-scheme: dark;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: #06080f;
    --bg: #06080f;
    --body-glow-top: rgba(92, 225, 230, 0.18);
    --body-glow-bottom: rgba(82, 198, 255, 0.16);
    --body-bg: radial-gradient(circle at top left, var(--body-glow-top), transparent 25%),
               radial-gradient(circle at bottom right, var(--body-glow-bottom), transparent 20%),
               linear-gradient(180deg, #06080f 0%, #05070c 100%);
    --surface: rgba(255, 255, 255, 0.08);
    --surface-strong: rgba(255, 255, 255, 0.16);
    --text: #e8f1ff;
    --muted: #97a7c0;
    --accent: #5ce1e6;
    --accent-strong: #4db4ff;
    --border: rgba(255, 255, 255, 0.14);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --header-bg: rgba(6, 8, 15, 0.75);
    --toggle-bg: rgba(255, 255, 255, 0.08);
    --toggle-border: rgba(255, 255, 255, 0.14);
    --btn-secondary-bg: rgba(255, 255, 255, 0.08);
    --btn-secondary-border: rgba(255, 255, 255, 0.14);
    --shadow: rgba(0, 0, 0, 0.22);
    --particle-color: rgba(92, 225, 230, 0.18);
    --cursor-glow: rgba(92, 225, 230, 0.16);
    --hero-glow: rgba(92, 225, 230, 0.22);
    --hero-text-gradient: linear-gradient(135deg, #e8f1ff, #5ce1e6);
    --btn-shadow: rgba(92, 225, 230, 0.24);
    --btn-shadow-hover: rgba(92, 225, 230, 0.35);
    --tag-bg: rgba(37, 99, 235, 0.12);
    --project-shadow: rgba(0, 0, 0, 0.18);
    --search-bg: rgba(255, 255, 255, 0.05);
    --contact-hover-bg: rgba(92, 225, 230, 0.08);
    --mood-creative: linear-gradient(135deg, #5ce1e6, #4db4ff);
    --mood-focused: linear-gradient(135deg, #a78bfa, #f472b6);
    --mood-energetic: linear-gradient(135deg, #fbbf24, #f97316);
    --mood-calm: linear-gradient(135deg, #34d399, #22d3ee);
}

:root[data-theme="light"] {
    color-scheme: light;
    --text: #17233d;
    --muted: #54607a;
    --accent: #2563eb;
    --accent-strong: #0ea5e9;
    --surface: rgba(255, 255, 255, 0.86);
    --surface-strong: rgba(255, 255, 255, 0.94);
    --border: rgba(148, 163, 184, 0.22);
    --card-bg: rgba(248, 250, 252, 0.88);
    --card-border: rgba(148, 163, 184, 0.2);
    --header-bg: rgba(255, 255, 255, 0.82);
    --toggle-bg: rgba(15, 23, 42, 0.06);
    --toggle-border: rgba(148, 163, 184, 0.25);
    --btn-secondary-bg: rgba(241, 245, 249, 0.8);
    --btn-secondary-border: rgba(148, 163, 184, 0.18);
    --shadow: rgba(15, 23, 42, 0.08);
    --body-glow-top: rgba(59, 130, 246, 0.08);
    --body-glow-bottom: rgba(14, 165, 233, 0.06);
    --body-bg: radial-gradient(circle at top left, var(--body-glow-top), transparent 25%),
               radial-gradient(circle at bottom right, var(--body-glow-bottom), transparent 20%),
               linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
    --particle-color: rgba(37, 99, 235, 0.16);
    --cursor-glow: rgba(59, 130, 246, 0.14);
    --hero-glow: rgba(59, 130, 246, 0.18);
    --hero-text-gradient: linear-gradient(135deg, #1e40af, #2563eb);
    --btn-shadow: rgba(37, 99, 235, 0.14);
    --btn-shadow-hover: rgba(37, 99, 235, 0.22);
    --tag-bg: rgba(37, 99, 235, 0.1);
    --project-shadow: rgba(15, 23, 42, 0.06);
    --search-bg: rgba(255, 255, 255, 0.9);
    --contact-hover-bg: rgba(37, 99, 235, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100%;
    background: var(--body-bg);
    color: var(--text);
    overflow-x: hidden;
    transition: background 0.5s ease, color 0.5s ease;
}

canvas#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.cursor-glow {
    position: fixed;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--cursor-glow), transparent 70%);
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.page-wrap {
    position: relative;
    z-index: 2;
    max-width: 1120px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: var(--header-bg);
    padding: 16px 24px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.site-brand {
    font-size: 0.85rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.site-brand .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: center;
    justify-content: center;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease, transform 0.2s ease;
    position: relative;
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.site-nav a:hover::after,
.site-nav a.active::after {
    width: 100%;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--text);
}

.theme-toggle {
    background: var(--toggle-bg);
    border: 1px solid var(--toggle-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--surface-strong);
    color: var(--text);
    transform: rotate(180deg);
}

.hero-card {
    position: relative;
    overflow: hidden;
    padding: clamp(32px, 5vw, 60px);
    border-radius: 32px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    box-shadow: 0 36px 80px var(--shadow);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, var(--hero-glow), transparent 26%);
    pointer-events: none;
}

.hero-copy {
    position: relative;
    z-index: 1;
}

.hero-copy h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.02;
    max-width: 720px;
    margin-bottom: 20px;
    background: var(--hero-text-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-copy p {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 720px;
    margin-bottom: 30px;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.btn,
.btn-secondary {
    border: none;
    border-radius: 999px;
    padding: 14px 26px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    font-family: inherit;
}

.btn {
    color: #09101b;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    box-shadow: 0 18px 40px var(--btn-shadow);
}

.btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 22px 48px var(--btn-shadow-hover);
}

.btn-secondary {
    color: var(--text);
    background: var(--btn-secondary-bg);
    border: 1px solid var(--btn-secondary-border);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background: var(--surface-strong);
}

.section {
    margin-top: 64px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
}

.section-header small {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: clamp(2rem, 3vw, 2.6rem);
}

.intro-panel,
.card,
.interactive-panel {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    padding: 28px;
}

.intro-panel p,
.card p,
.interactive-panel p {
    color: var(--muted);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 2fr 1fr;
    }
}

.about-text p {
    color: var(--muted);
    margin-bottom: 16px;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--muted);
}

.skills-grid,
.projects-grid {
    display: grid;
    gap: 20px;
}

.skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    margin-top: 24px;
}

.skill-chip {
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: default;
}

.skill-chip:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
}

.skill-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-pill {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    font-weight: 600;
}

.filter-pill.active,
.filter-pill:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent-strong);
    transform: translateY(-2px);
}

.project-card {
    min-height: 240px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 28px;
    border-radius: 28px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    box-shadow: 0 18px 40px var(--project-shadow);
    transition: transform 0.25s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--mood-creative);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover::before {
    opacity: 1;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-card h3 {
    font-size: 1.2rem;
}

.project-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.project-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(37, 99, 235, 0.12);
    color: var(--accent);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.project-tag:hover {
    transform: scale(1.05);
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
    margin-top: auto;
    align-self: flex-start;
}

.project-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.projects-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
    align-items: center;
}

.search-box input {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    border-color: var(--accent);
}

.interactive-panel {
    display: grid;
    gap: 18px;
}

.interactive-panel button {
    border: none;
    border-radius: 999px;
    padding: 14px 22px;
    font-weight: 700;
    cursor: pointer;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(34, 211, 238, 0.18));
    color: var(--text);
    transition: transform 0.2s ease;
    font-family: inherit;
}

.interactive-panel button:hover {
    transform: translateY(-2px);
}

.contact-panel {
    display: grid;
    gap: 16px;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    padding: 12px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.contact-link img.contact-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.contact-link span {
    display: inline-block;
    vertical-align: middle;
}

.contact-link:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    background: var(--contact-hover-bg);
}

.contact-icon {
    font-size: 1.2rem;
}

.contact-form {
    display: grid;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 14px 18px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
}

.footer {
    margin-top: 72px;
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

.footer-small {
    font-size: 0.85rem;
    margin-top: 8px;
    opacity: 0.7;
}

.fun-section .fun-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.fun-card h3 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.mood-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0;
}

.mood-btn {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    font-weight: 600;
}

.mood-btn.active,
.mood-btn:hover {
    color: #ffffff;
    border-color: var(--accent);
    transform: translateY(-2px);
}

.mood-btn[data-mood="creative"].active { background: linear-gradient(135deg, rgba(92, 225, 230, 0.2), rgba(77, 180, 255, 0.2)); }
.mood-btn[data-mood="focused"].active { background: linear-gradient(135deg, rgba(167, 139, 250, 0.2), rgba(244, 114, 182, 0.2)); }
.mood-btn[data-mood="energetic"].active { background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(249, 115, 22, 0.2)); }
.mood-btn[data-mood="calm"].active { background: linear-gradient(135deg, rgba(52, 211, 153, 0.2), rgba(34, 211, 238, 0.2)); }

.mood-display {
    padding: 12px 16px;
    background: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.math-game {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.math-problem {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    padding: 16px;
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.math-game input {
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    outline: none;
    text-align: center;
    font-size: 1.1rem;
}

.math-game input:focus {
    border-color: var(--accent);
}

.math-feedback {
    text-align: center;
    font-weight: 700;
    min-height: 24px;
}

.math-feedback.correct { color: #34d399; }
.math-feedback.wrong { color: #f87171; }

.type-racer {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quote-display {
    padding: 16px;
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    line-height: 1.6;
    min-height: 80px;
}

.quote-display .correct { color: #34d399; }
.quote-display .incorrect { color: #f87171; text-decoration: underline; }
.quote-display .current { border-left: 2px solid var(--accent); padding-left: 2px; }

.type-racer textarea {
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-family: 'Courier New', monospace;
    outline: none;
    resize: vertical;
}

.type-racer textarea:focus {
    border-color: var(--accent);
}

.type-stats {
    display: flex;
    gap: 16px;
    font-weight: 600;
}

.type-stats strong {
    color: var(--accent);
}

.clicker-game {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.clicker-btn {
    padding: 24px 48px;
    font-size: 1.5rem;
    font-weight: 800;
    border: none;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #09101b;
    cursor: pointer;
    transition: transform 0.1s ease;
    box-shadow: 0 12px 32px rgba(92, 225, 230, 0.3);
}

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

.clicker-stats {
    display: flex;
    gap: 24px;
    font-weight: 700;
}

.clicker-stats strong {
    color: var(--accent);
    font-size: 1.2rem;
}

@media (min-width: 900px) {
    .skills-grid,
    .projects-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .page-wrap {
        padding: 24px 16px 48px;
    }

    .site-header {
        padding: 12px 16px;
    }

    .hero-copy h1 {
        font-size: 2.2rem;
    }

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