/* ================================
   CSS Design System - Cemil Dalar Portfolio
   Premium Dark Theme with Glassmorphism
   ================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #16161f;
    --bg-card: rgba(22, 22, 31, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.03);

    --text-primary: #e8e8ed;
    --text-secondary: #8b8b9e;
    --text-muted: #55556a;

    --accent-primary: #6c63ff;
    --accent-secondary: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #6c63ff, #a78bfa);
    --accent-glow: rgba(108, 99, 255, 0.15);
    --accent-glow-strong: rgba(108, 99, 255, 0.3);
    --accent-rgb: 108, 99, 255;

    --green: #4ade80;
    --yellow: #fbbf24;
    --red: #f87171;
    --cyan: #22d3ee;

    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(108, 99, 255, 0.3);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1200px;
    --container-padding: 0 24px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--accent-gradient);
    z-index: 10000;
    transition: width 0.1s linear;
    box-shadow: 0 0 8px var(--accent-glow);
}

/* --- Preloader --- */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.preloader-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.preloader-logo {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 4px;
    animation: preloaderPulse 1.5s ease-in-out infinite;
}

.preloader-bracket {
    color: var(--accent-primary);
    animation: preloaderBracket 1.5s ease-in-out infinite;
}

.preloader-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preloader-bar {
    width: 180px;
    height: 3px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
}

.preloader-bar-fill {
    width: 0%;
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    animation: preloaderFill 1.2s ease-out forwards;
}

.preloader-label {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
}

@keyframes preloaderPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes preloaderBracket {

    0%,
    100% {
        opacity: 1;
        transform: translateX(0);
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes preloaderFill {
    0% {
        width: 0%;
    }

    50% {
        width: 60%;
    }

    100% {
        width: 100%;
    }
}

/* --- Language Toggle --- */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: var(--transition-fast);
    background: transparent;
    margin-left: 8px;
}

.lang-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
    background: var(--accent-glow);
}

.lang-toggle i {
    font-size: 1rem;
}

/* --- Theme Toggle --- */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    background: transparent;
    margin-left: 4px;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
    background: var(--accent-glow);
}

/* --- Color Picker --- */
.color-picker-wrapper {
    position: relative;
}

.color-picker-popup {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    min-width: 200px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.color-picker-popup.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.color-picker-label {
    font-size: 0.72rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: block;
    margin-bottom: 12px;
}

.color-picker-swatches {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: var(--swatch);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    padding: 0;
}

.color-swatch:hover {
    transform: scale(1.15);
}

.color-swatch.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--bg-secondary), 0 0 0 5px var(--swatch);
}

.color-picker-custom {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.color-picker-custom label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.color-picker-custom input[type="color"] {
    width: 32px;
    height: 28px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
    padding: 2px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* --- Background Effects --- */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(108, 99, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(108, 99, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

.bg-noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.015;
    z-index: 0;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* --- Cursor Glow --- */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--container-padding);
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-base);
    padding: 20px 0;
}

.nav.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 2px;
}

.logo-bracket {
    color: var(--accent-primary);
}

.logo-text {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 24px 80px;
    max-width: var(--container-max);
    margin: 0 auto;
    gap: 60px;
}

.hero-content {
    flex: 1;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 100px;
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--green);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 24px;
}

.hero-greeting {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-secondary);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-role {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--text-primary);
    min-height: 2.5rem;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.hero-role .cursor {
    display: inline-block;
    width: 3px;
    height: 1.2em;
    background: var(--accent-primary);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 550px;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

.hero-desc strong {
    color: var(--text-primary);
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease-out 0.7s both;
}

.hero-stats {
    display: flex;
    gap: 40px;
    animation: fadeInUp 0.6s ease-out 0.8s both;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Hero Visual - Code Window */
.hero-visual {
    flex: 0 0 420px;
    z-index: 2;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.code-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 20px 60px rgba(0, 0, 0, 0.4);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.code-dots {
    display: flex;
    gap: 8px;
}

.code-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red {
    background: #ff5f57;
}

.dot.yellow {
    background: #febc2e;
}

.dot.green {
    background: #28c840;
}

.code-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.code-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-body pre {
    margin: 0;
}

.code-keyword {
    color: #c678dd;
}

.code-var {
    color: #e5c07b;
}

.code-key {
    color: #e06c75;
}

.code-string {
    color: #98c379;
}

.code-boolean {
    color: #d19a66;
}

.code-comment {
    color: #5c6370;
    font-style: italic;
}

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-line {
    width: 3px;
    height: 10px;
    background: var(--accent-primary);
    border-radius: 3px;
    animation: scrollAnim 2s infinite;
}

@keyframes scrollAnim {
    0% {
        transform: translateY(0);
        opacity: 1;
    }

    50% {
        transform: translateY(8px);
        opacity: 0.3;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn i {
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-glow-strong);
}

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

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    background: var(--accent-glow);
    transform: translateY(-2px);
}

/* --- Sections --- */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 2;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px;
    margin: 0 auto;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-text strong {
    color: var(--text-primary);
}

.about-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.detail-card:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.detail-card i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.detail-card div {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.detail-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --- GitHub Contribution Graph --- */
.contrib-wrapper {
    max-width: 960px;
    margin: 0 auto;
}

.contrib-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    overflow: hidden;
    transition: var(--transition-base);
}

.contrib-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 40px rgba(108, 99, 255, 0.08);
}

.contrib-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.contrib-header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.contrib-header-left>i {
    font-size: 2rem;
    color: var(--accent-primary);
}

.contrib-total {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
    display: block;
    line-height: 1.2;
}

.contrib-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.contrib-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--accent-secondary);
    padding: 6px 14px;
    border: 1px solid rgba(108, 99, 255, 0.2);
    border-radius: 100px;
    transition: var(--transition-fast);
}

.contrib-profile-link:hover {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* Month labels row */
.contrib-months {
    display: flex;
    gap: 0;
    padding-left: 36px;
    margin-bottom: 6px;
    overflow: hidden;
}

.contrib-month-label {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

/* Body: day labels + graph */
.contrib-body {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.contrib-body::-webkit-scrollbar {
    height: 4px;
}

.contrib-body::-webkit-scrollbar-track {
    background: transparent;
}

.contrib-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.contrib-days-labels {
    display: grid;
    grid-template-rows: repeat(7, 1fr);
    gap: 3px;
    flex-shrink: 0;
    padding-top: 0;
}

.contrib-days-labels span {
    font-size: 0.6rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    height: 13px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 6px;
    min-width: 30px;
}

/* The heatmap grid — columns of weeks, 7 rows each */
.contrib-graph {
    display: flex;
    gap: 3px;
    flex: 1;
    min-height: 109px;
    position: relative;
}

.contrib-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    gap: 8px;
}

.contrib-loading i {
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.contrib-week {
    display: grid;
    grid-template-rows: repeat(7, 1fr);
    gap: 3px;
}

/* The individual contribution cell */
.contrib-cell {
    width: 13px;
    height: 13px;
    border-radius: 3px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    cursor: pointer;
    position: relative;
}

.contrib-cell:hover {
    transform: scale(1.4);
    z-index: 10;
}

/* Accent-aware color scale for contribution cells */
.contrib-cell[data-level="0"] {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.contrib-cell[data-level="1"] {
    background: rgba(var(--accent-rgb), 0.2);
    border: 1px solid rgba(var(--accent-rgb), 0.15);
    box-shadow: 0 0 4px rgba(var(--accent-rgb), 0.1);
}

.contrib-cell[data-level="2"] {
    background: rgba(var(--accent-rgb), 0.4);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    box-shadow: 0 0 6px rgba(var(--accent-rgb), 0.15);
}

.contrib-cell[data-level="3"] {
    background: rgba(var(--accent-rgb), 0.65);
    border: 1px solid rgba(var(--accent-rgb), 0.5);
    box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.2);
}

.contrib-cell[data-level="4"] {
    background: rgba(var(--accent-rgb), 0.9);
    border: 1px solid rgba(var(--accent-rgb), 0.7);
    box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.3);
}

.contrib-cell[data-level="3"]:hover,
.contrib-cell[data-level="4"]:hover {
    box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.5);
}

/* Footer */
.contrib-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.contrib-learn {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.contrib-learn:hover {
    color: var(--accent-secondary);
}

.contrib-legend {
    display: flex;
    align-items: center;
    gap: 4px;
}

.contrib-legend-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin: 0 4px;
}

.contrib-legend .contrib-cell {
    width: 11px;
    height: 11px;
    cursor: default;
}

.contrib-legend .contrib-cell:hover {
    transform: none;
}

/* Tooltip */
.contrib-tooltip {
    position: fixed;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-primary);
    pointer-events: none;
    opacity: 0;
    z-index: 5000;
    white-space: nowrap;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    transition: opacity 0.15s ease;
}

.contrib-tooltip.visible {
    opacity: 1;
}

.contrib-tooltip strong {
    color: var(--accent-secondary);
    font-family: var(--font-mono);
}




/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.skill-category {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.skill-category:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.skill-category-header i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.skill-category-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 100px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
    background: var(--accent-glow);
}

.skill-tag[data-level="advanced"] {
    border-color: rgba(108, 99, 255, 0.2);
    color: var(--accent-secondary);
}

/* --- Projects Section --- */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 100px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.filter-btn.active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.project-card {
    position: relative;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    overflow: hidden;
}

.project-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.4s;
    background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-glow) 0%, transparent 40%);
    pointer-events: none;
}

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

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project-card.project-featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.05), rgba(167, 139, 250, 0.05));
    border-color: rgba(108, 99, 255, 0.15);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.project-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-icon i {
    font-size: 1.4rem;
    color: var(--accent-primary);
}

.project-links {
    display: flex;
    gap: 8px;
}

.project-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

.project-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.project-tech span {
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: 100px;
    background: rgba(108, 99, 255, 0.08);
    color: var(--accent-secondary);
}

.projects-cta {
    text-align: center;
    margin-top: 48px;
}

/* Hidden project cards for filter */
.project-card.hidden {
    display: none;
}

/* --- Experience / Timeline --- */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 0 0 2px var(--accent-primary);
    z-index: 1;
}

.timeline-content {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.timeline-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-secondary);
    white-space: nowrap;
}

.timeline-company {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.timeline-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.timeline-tech span {
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: 100px;
    background: rgba(108, 99, 255, 0.08);
    color: var(--accent-secondary);
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-text h3 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

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

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    cursor: pointer;
}

.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
    background: rgba(108, 99, 255, 0.05);
}

.contact-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-card-icon i {
    font-size: 1.4rem;
    color: var(--accent-primary);
}

.contact-card-info {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.contact-card-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.contact-card-arrow {
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.contact-card:hover .contact-card-arrow {
    color: var(--accent-primary);
    transform: translate(2px, -2px);
}

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: relative;
    z-index: 2;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 2px;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-socials {
    display: flex;
    gap: 12px;
}

.footer-socials a {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-socials a:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* --- Animations --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- Particle Canvas --- */
#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* --- Certificates Section --- */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.cert-card {
    position: relative;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cert-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.4s;
    background: radial-gradient(400px circle at 50% 0%, rgba(108, 99, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.cert-card:hover .cert-card-glow {
    opacity: 1;
}

.cert-card.has-image {
    padding-top: 0;
}

.cert-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    margin-bottom: 12px;
    position: relative;
}

.cert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.cert-card:hover .cert-image img {
    transform: scale(1.05);
}

.cert-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.cert-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.1), rgba(167, 139, 250, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    flex-shrink: 0;
}

.cert-icon i {
    font-size: 1.6rem;
    color: var(--accent-primary);
}

.cert-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cert-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.cert-issuer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.cert-issuer i {
    font-size: 1rem;
}

.cert-date {
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.cert-date i {
    font-size: 0.85rem;
}

.cert-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 4px;
}

.cert-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.cert-tech span {
    font-size: 0.72rem;
    font-weight: 500;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: 100px;
    background: rgba(108, 99, 255, 0.08);
    color: var(--accent-secondary);
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-secondary);
    margin-top: 12px;
    transition: var(--transition-fast);
    align-self: flex-start;
}

.cert-link:hover {
    color: var(--accent-primary);
    transform: translateX(4px);
}

.cert-link i {
    font-size: 1rem;
    transition: transform 0.2s ease;
}

.cert-link:hover i {
    transform: translate(2px, -2px);
}

/* ============================================================
   RESPONSIVE — Mobile-first improvements
   ============================================================ */

/* --- ≤1024px — Tablet landscape --- */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-desc {
        text-align: center;
    }

    .hero-visual {
        flex: none;
        width: 100%;
        max-width: 500px;
    }

    .hero-stats {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
}

/* --- ≤768px — Tablet portrait / Mobile --- */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
        --container-padding: 0 20px;
    }

    /* Navigation mobile drawer */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        height: 100dvh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 4px;
        transition: right 0.3s ease;
        z-index: 1001;
        overflow-y: auto;
    }

    .nav-links.open {
        right: 0;
        box-shadow: -8px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
        border-radius: var(--radius-sm);
    }

    /* Mobile nav backdrop overlay */
    .nav-links.open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
    }

    /* Lang and theme toggles smaller on mobile */
    .lang-toggle {
        padding: 5px 10px;
        font-size: 0.75rem;
        margin-left: 4px;
    }

    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    /* Color picker mobile positioning */
    .color-picker-popup {
        right: -40px;
        min-width: 180px;
    }

    /* Hero section */
    .hero {
        padding: 120px 20px 60px;
        gap: 40px;
        min-height: auto;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .hero-scroll {
        display: none;
    }

    /* Code window hidden on mobile */
    .code-window {
        display: none;
    }

    /* Section headers */
    .section-header {
        margin-bottom: 40px;
    }

    /* Skills grid */
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .skill-category {
        padding: 20px;
    }

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

    .project-card.project-featured {
        grid-column: auto;
    }

    .project-card {
        padding: 20px;
    }

    .project-filters {
        gap: 6px;
    }

    .filter-btn {
        font-size: 0.8rem;
        padding: 6px 14px;
    }

    /* Certificates grid */
    .certificates-grid {
        grid-template-columns: 1fr;
    }

    .cert-card {
        padding: 20px;
    }

    /* Timeline */
    .timeline {
        padding-left: 32px;
    }

    .timeline-dot {
        left: -25px;
        width: 10px;
        height: 10px;
    }

    .timeline-content {
        padding: 20px;
    }

    .timeline-item {
        margin-bottom: 32px;
    }

    /* Contact */
    .contact-text h3 {
        font-size: 1.6rem;
    }

    .contact-card {
        padding: 16px 20px;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    /* Contribution graph */
    .contrib-card {
        padding: 20px;
    }

    .contrib-cell {
        width: 10px;
        height: 10px;
    }

    .contrib-week {
        gap: 2px;
    }

    .contrib-graph {
        gap: 2px;
    }

    .contrib-body {
        gap: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .contrib-days-labels span {
        font-size: 0.5rem;
        min-width: 22px;
    }

    .contrib-months {
        padding-left: 28px;
    }

    .contrib-total {
        font-size: 1.3rem;
    }

    .contrib-header {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Snake / Pong / Flappy game containers */
    .snake-container {
        width: 95vw;
        max-width: 400px;
        border-radius: var(--radius-lg);
    }

    #snakeCanvas,
    #pongCanvas,
    #flappyCanvas {
        width: 100% !important;
        height: auto !important;
    }

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

    .snake-title {
        font-size: 0.95rem;
    }

    .snake-info {
        padding: 10px 16px;
        font-size: 0.65rem;
        flex-wrap: wrap;
        gap: 4px;
    }

    /* Terminal */
    .terminal-window {
        width: 100%;
        max-width: 100vw;
        max-height: 100vh;
        max-height: 100dvh;
        border-radius: 0;
        margin: 0;
    }

    #terminalOverlay {
        align-items: stretch;
        padding: 0;
    }

    .terminal-body {
        max-height: none;
        flex: 1;
        padding: 12px 16px;
    }

    .terminal-input {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    .terminal-prompt {
        font-size: 0.75rem;
    }

    .terminal-line {
        font-size: 0.75rem;
    }

    .terminal-ascii {
        font-size: 0.35rem;
        line-height: 1.05;
    }

    /* Login card mobile */
    .login-card {
        padding: 28px 24px;
        margin: 16px;
    }

    .login-title {
        font-size: 1.3rem;
    }
}

/* --- ≤480px — Small phones --- */
@media (max-width: 480px) {
    :root {
        --container-padding: 0 16px;
    }

    .hero {
        padding: 110px 16px 50px;
    }

    .hero-name {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }

    .hero-role {
        font-size: 1.2rem;
    }

    .hero-greeting {
        font-size: 0.95rem;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-badge {
        font-size: 0.72rem;
        padding: 5px 12px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-tag {
        font-size: 0.78rem;
    }

    .btn {
        padding: 11px 20px;
        font-size: 0.85rem;
    }

    /* About details */
    .detail-card {
        padding: 16px;
        gap: 12px;
    }

    .detail-card i {
        font-size: 1.2rem;
    }

    /* Contrib graph — smaller cells */
    .contrib-cell {
        width: 8px;
        height: 8px;
        border-radius: 2px;
    }

    .contrib-week {
        gap: 2px;
    }

    .contrib-graph {
        gap: 2px;
    }

    .contrib-days-labels span {
        min-width: 18px;
        font-size: 0.45rem;
    }

    .contrib-months {
        padding-left: 22px;
    }

    .contrib-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Timeline phone */
    .timeline {
        padding-left: 28px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-dot {
        left: -24px;
        width: 8px;
        height: 8px;
    }

    .timeline-content {
        padding: 16px;
    }

    .timeline-header h3 {
        font-size: 0.95rem;
    }

    .timeline-date {
        font-size: 0.72rem;
    }

    /* Contact */
    .contact-text h3 {
        font-size: 1.3rem;
    }

    .contact-card {
        padding: 14px 16px;
    }

    .contact-card-icon {
        width: 40px;
        height: 40px;
    }

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

    /* Project card phone */
    .project-card {
        padding: 18px;
    }

    .project-icon {
        width: 40px;
        height: 40px;
    }

    .project-icon i {
        font-size: 1.2rem;
    }

    .project-title {
        font-size: 1.05rem;
    }

    .project-desc {
        font-size: 0.85rem;
    }

    /* Certificate card phone */
    .cert-card {
        padding: 18px;
    }

    .cert-title {
        font-size: 1rem;
    }

    .cert-icon {
        width: 44px;
        height: 44px;
    }

    .cert-icon i {
        font-size: 1.3rem;
    }

    /* Skill category phone */
    .skill-category {
        padding: 18px;
    }

    .skill-tag {
        font-size: 0.75rem;
        padding: 5px 12px;
    }

    /* Footer phone */
    .footer {
        padding: 30px 0;
    }

    .footer-text {
        font-size: 0.78rem;
    }

    /* Preloader phone */
    .preloader-logo {
        font-size: 2.2rem;
    }

    /* Terminal full-screen on phone */
    .terminal-ascii {
        font-size: 0.28rem;
    }

    /* Nav drawer a bit narrower */
    .nav-links {
        width: 260px;
    }

    /* Color picker */
    .color-picker-popup {
        right: -60px;
        min-width: 170px;
    }

    .color-swatch {
        width: 24px;
        height: 24px;
    }
}

/* --- Snake Game Easter Egg --- */
#snakeOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99998;
    animation: fadeInUp 0.3s ease;
}

.snake-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.snake-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.snake-title {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.snake-score {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-secondary);
    font-weight: 600;
}

.snake-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.snake-close:hover {
    border-color: var(--red);
    color: var(--red);
    background: rgba(248, 113, 113, 0.1);
}

#snakeCanvas {
    display: block;
    border-radius: 0;
}

.snake-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.72rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

/* Game containers light theme */
[data-theme="light"] .snake-container {
    background: #ffffff;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] #snakeOverlay,
[data-theme="light"] #pongOverlay,
[data-theme="light"] #flappyOverlay {
    background: rgba(0, 0, 0, 0.5);
}

/* --- Matrix Rain Easter Egg --- */
#matrixOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99998;
    background: #000;
}

#matrixOverlay canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.matrix-hint {
    position: fixed;
    bottom: 24px;
    right: 24px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
    z-index: 99999;
}

/* Game overlay shared — Pong & Flappy reuse snake-container */
#pongOverlay,
#flappyOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99998;
    animation: fadeInUp 0.3s ease;
}

/* --- Interactive Terminal --- */
#terminalOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99998;
    animation: fadeInUp 0.3s ease;
}

.terminal-scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 99999;
    background: repeating-linear-gradient(0deg,
            rgba(0, 0, 0, 0.03) 0px,
            rgba(0, 0, 0, 0.03) 1px,
            transparent 1px,
            transparent 3px);
    animation: scanlineScroll 8s linear infinite;
}

@keyframes scanlineScroll {
    from {
        background-position: 0 0;
    }

    to {
        background-position: 0 100px;
    }
}

.terminal-window {
    width: 760px;
    max-width: 95vw;
    max-height: 85vh;
    background: #0c0c14;
    border: 1px solid rgba(108, 99, 255, 0.2);
    border-radius: 12px;
    overflow: hidden;
    box-shadow:
        0 0 60px rgba(108, 99, 255, 0.08),
        0 24px 80px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.terminal-titlebar {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: #12121c;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    gap: 12px;
}

.terminal-dots {
    display: flex;
    gap: 7px;
}

.terminal-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.35);
}

.terminal-close-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.terminal-close-btn:hover {
    color: #f43f5e;
    background: rgba(244, 63, 94, 0.1);
}

.terminal-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    max-height: 70vh;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.terminal-output {
    margin-bottom: 8px;
}

.terminal-line {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    white-space: pre-wrap;
    word-break: break-word;
}

.terminal-ascii {
    color: var(--accent-primary);
    font-size: 0.55rem;
    line-height: 1.1;
}

.terminal-boot {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.78rem;
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-prompt {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent-primary);
    white-space: nowrap;
    font-weight: 600;
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: rgba(255, 255, 255, 0.9);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    caret-color: var(--accent-primary);
}

.terminal-cursor-blink {
    width: 8px;
    height: 16px;
    background: var(--accent-primary);
    animation: cursorBlink 1s step-end infinite;
    flex-shrink: 0;
}

@keyframes cursorBlink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

/* Terminal color utilities */
.t-accent {
    color: var(--accent-primary);
    font-weight: 600;
}

.t-cmd {
    color: var(--accent-secondary);
}

.t-muted {
    color: rgba(255, 255, 255, 0.35);
}

.t-error {
    color: #f43f5e;
}

.t-link {
    color: #22d3ee;
    text-decoration: underline;
}

/* --- Secret Easter Egg Menu (long-press on footer logo) --- */
.secret-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 99990;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInUp 0.25s ease;
}

.secret-menu {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    max-width: 320px;
    width: 90vw;
    text-align: center;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.secret-menu-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.secret-menu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 16px;
}

.secret-menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
}

.secret-menu-btn:hover,
.secret-menu-btn:active {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

.secret-menu-btn .emoji {
    font-size: 1.6rem;
}

.secret-menu-close {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    padding: 8px 16px;
    border-radius: 100px;
    transition: var(--transition-fast);
}

.secret-menu-close:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}