/* ===== CSS Variables ===== */
:root {
    /* Colors - Dark Tech Theme */
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;

    --text-primary: #f9fafb;
    --text-secondary: #b4bcc9;
    --text-muted: #8b95a5;

    --accent-primary: #00d9ff;
    --accent-secondary: #00ff88;
    --accent-gradient: linear-gradient(135deg, #00d9ff 0%, #00ff88 100%);

    --glass-bg: rgba(17, 24, 39, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.3);

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

    /* Spacing */
    --section-padding: 120px;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Light Mode Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #e2e8f0;
    --bg-tertiary: #cbd5e1;

    --text-primary: #1e293b;
    --text-secondary: #374151;
    --text-muted: #4b5563;

    --accent-primary: #0891b2;
    --accent-secondary: #059669;
    --accent-gradient: linear-gradient(135deg, #0891b2 0%, #059669 100%);

    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 30px rgba(8, 145, 178, 0.3);
}

/* Nav Actions Container */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

/* Light mode navbar scrolled */
[data-theme="light"] .navbar.scrolled {
    background: rgba(248, 250, 252, 0.95);
}

/* Language Toggle Button */
.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lang-toggle:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.lang-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* ===== 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-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* ===== Utility Classes ===== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: transparent;
    transition: background var(--transition-normal), padding var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

.nav-link:hover {
    color: var(--text-primary);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-normal);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 217, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 255, 136, 0.1) 0%, transparent 40%),
        var(--bg-primary);
}

[data-theme="light"] .hero-bg {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(8, 145, 178, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(5, 150, 105, 0.1) 0%, transparent 40%),
        var(--bg-primary);
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

[data-theme="light"] .grid-overlay {
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-avatar {
    width: 160px;
    height: 160px;
    margin-bottom: 24px;
    position: relative;
    cursor: pointer;
    z-index: 10;
}

.hero-avatar::before {
    content: '';
    position: absolute;
    inset: -4px;
    background: var(--accent-gradient);
    border-radius: 50%;
    z-index: -1;
}

.hero-avatar::after {
    content: '';
    position: absolute;
    inset: -8px;
    background: var(--accent-gradient);
    border-radius: 50%;
    z-index: -2;
    opacity: 0.3;
    filter: blur(15px);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    transition: transform var(--transition-normal);
}

/* Avatar Preview on Hover */
.avatar-preview {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.5);
    width: 280px;
    height: 280px;
    border-radius: 20px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    z-index: 100;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-avatar:hover .avatar-preview {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Gradient fade overlay */
.avatar-preview::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at center, transparent 30%, var(--bg-primary) 90%);
    pointer-events: none;
}

[data-theme="light"] .avatar-preview::after {
    background:
        radial-gradient(ellipse at center, transparent 30%, var(--bg-primary) 90%);
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 8px;
}

/* Primary name - Xavier Lu for EN, 路濬誠 for ZH */
.name-alias-en {
    display: block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.name-alias-zh {
    display: none;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Full legal name - shown as secondary */
.name-full {
    display: block;
    font-size: 0.5em;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: 8px;
}

/* Chinese mode: show 路濬誠, hide Xavier Lu */
[data-lang="zh"] .name-alias-en {
    display: none;
}

[data-lang="zh"] .name-alias-zh {
    display: block;
}

.hero-title {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 24px;
    min-height: 2.2em;
}

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

.cursor {
    color: var(--accent-primary);
    animation: blink 1s infinite;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-description strong {
    color: var(--accent-secondary);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.hero-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    transition: all var(--transition-normal);
}

.info-card:hover {
    transform: translateX(8px);
    border-color: var(--accent-primary);
}

.info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 12px;
    color: var(--accent-primary);
}

.info-icon svg {
    width: 24px;
    height: 24px;
}

.info-content {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.info-value:hover {
    color: var(--accent-primary);
}

.email-copy-hero {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.email-copy-hero .copy-icon {
    width: 14px;
    height: 14px;
    min-width: 14px;
    min-height: 14px;
    max-width: 14px;
    max-height: 14px;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.email-copy-hero:hover .copy-icon {
    opacity: 1;
}

.info-content {
    position: relative;
}

.hero-copy-tooltip {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 4px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: float 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--accent-primary);
    border-bottom: 2px solid var(--accent-primary);
    transform: rotate(45deg);
}

@keyframes float {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

/* ===== Sections ===== */
.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    font-family: var(--font-mono);
}

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

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

.about-intro {
    font-size: 1.3rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-card {
    padding: 28px 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== Skills Section ===== */
.skills {
    background: var(--bg-secondary);
}

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

.skill-category {
    padding: 32px;
    transition: all var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: var(--text-primary);
}

.skill-icon svg {
    width: 28px;
    height: 28px;
}

.skill-icon.linux {
    background: rgba(255, 193, 7, 0.15);
    color: #ffc107;
}

.skill-icon.cloud {
    background: rgba(0, 217, 255, 0.15);
    color: var(--accent-primary);
}

.skill-icon.container {
    background: rgba(33, 150, 243, 0.15);
    color: #2196f3;
}

.skill-icon.devops {
    background: rgba(156, 39, 176, 0.15);
    color: #9c27b0;
}

.skill-icon.monitoring {
    background: rgba(0, 255, 136, 0.15);
    color: var(--accent-secondary);
}

.skill-icon.security {
    background: rgba(244, 67, 54, 0.15);
    color: #f44336;
}

.skill-header h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-name {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.skill-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    width: 0;
    transition: width 1s ease-out;
}

/* ===== Experience Section ===== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary));
}

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

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

.timeline-marker {
    position: absolute;
    left: -7px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--bg-primary);
    border: 3px solid var(--accent-primary);
    border-radius: 50%;
    z-index: 1;
    transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-marker {
    background: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-primary);
}

.timeline-content {
    padding: 28px 32px;
    transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-content {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 8px;
}

.company-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.job-period {
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
    padding: 4px 12px;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 20px;
}

.job-title {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 16px;
}

.job-section-title {
    font-size: 0.95rem;
    color: var(--accent-primary);
    margin: 16px 0 8px 0;
    padding-left: 0;
}

.job-section-title:first-of-type {
    margin-top: 0;
}

.job-highlights {
    list-style: none;
    margin-bottom: 20px;
}

.job-highlights li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.job-highlights li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-secondary);
}

.job-highlights li strong {
    color: var(--accent-primary);
}

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

.tag {
    font-size: 0.8rem;
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    transition: all var(--transition-fast);
}

.tag:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ===== Education Section ===== */
.education {
    background: var(--bg-secondary);
}

.education-grid {
    display: flex;
    justify-content: center;
}

.education-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 40px 48px;
    max-width: 500px;
    transition: all var(--transition-normal);
}

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

.education-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 16px;
    color: var(--accent-primary);
}

.education-icon svg {
    width: 36px;
    height: 36px;
}

.education-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.education-content h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 8px;
}

.education-period {
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

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

.goal-card {
    padding: 36px 32px;
    text-align: center;
    transition: all var(--transition-normal);
}

.goal-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.goal-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 20px;
    color: var(--accent-primary);
    margin: 0 auto 24px;
}

.goal-icon svg {
    width: 36px;
    height: 36px;
}

.goal-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.goal-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Contact Section ===== */
.contact {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 32px;
    transition: all var(--transition-normal);
}

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

.contact-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 14px;
    color: var(--accent-primary);
    flex-shrink: 0;
    overflow: hidden;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    max-width: 28px;
    max-height: 28px;
}

.contact-content {
    display: flex;
    flex-direction: column;
    position: relative;
}

.contact-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.contact-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.contact-value:hover {
    color: var(--accent-primary);
}

.email-copy {
    cursor: pointer;
    transition: color var(--transition-fast);
}

.copy-icon {
    width: 18px;
    height: 18px;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.email-copy:hover .copy-icon {
    opacity: 1;
}

.copy-tooltip {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    padding: 6px 12px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
}

.copy-tooltip.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    padding: 48px 0 32px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
}

.footer-brand {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-link svg {
    width: 20px;
    height: 20px;
}

.footer-link:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Animations ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-avatar {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-info {
        max-width: 400px;
        margin: 0 auto;
    }

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

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        right: 0;
    }

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

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .timeline::before {
        left: 8px;
    }

    .timeline-item {
        padding-left: 40px;
    }

    .timeline-marker {
        left: 1px;
    }

    .timeline-header {
        flex-direction: column;
        gap: 8px;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 100px 16px 60px;
    }

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

    .skill-category {
        padding: 24px;
    }

    .timeline-content {
        padding: 20px;
    }

    .education-card {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
    }

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

    .btn {
        width: 100%;
    }

    .hero-cta {
        flex-direction: column;
    }
}