/* ============================================
   Rommel V. Lagera - Portfolio Website
   Modern Light Theme with Accent Colors
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f4f8;
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #8896a6;
    --accent: #2563eb;
    --accent-light: #2563eb;
    --accent-dark: #1d4ed8;
    --accent-glow: rgba(37, 99, 235, 0.08);
    --accent-secondary: #0891b2;
    --gradient-primary: linear-gradient(135deg, #2563eb, #0891b2);
    --gradient-accent: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(37, 99, 235, 0.35);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --container: 1200px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

::selection {
    background: var(--accent);
    color: #fff;
}

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent);
}

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

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    display: block;
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-light);
    background: var(--accent-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

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

.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);
}

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

.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(8, 145, 178, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(124, 58, 237, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-light);
    background: var(--accent-glow);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 50px;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    animation: pulse-border 3s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% { border-color: rgba(59, 130, 246, 0.2); }
    50% { border-color: rgba(59, 130, 246, 0.5); }
}

.hero-greeting {
    display: block;
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--accent-light);
    font-family: var(--font-mono);
    margin-bottom: 8px;
}

.hero-name {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1.2;
    padding-bottom: 4px;
    background: linear-gradient(135deg, #1a1a2e 0%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.hero-typewriter {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    min-height: 2em;
    font-family: var(--font-mono);
}

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

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-light);
    font-family: var(--font-mono);
    line-height: 1.2;
}

.stat-plus {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-light);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

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

/* --- 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);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--accent-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: 1rem;
}

/* --- Scroll Indicator --- */
.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: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--accent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* --- Section Styles --- */
.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 56px;
    letter-spacing: -1px;
}

.section-number {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1rem;
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
}

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

.about-lead {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.8;
}

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

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

.about-info {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.info-item i {
    color: var(--accent);
    width: 20px;
    text-align: center;
}

.video-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    aspect-ratio: 16/9;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.45);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.video-overlay:hover {
    background: rgba(26, 26, 46, 0.3);
}

.video-overlay i {
    font-size: 3rem;
    color: #fff;
    background: rgba(37, 99, 235, 0.6);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.video-overlay span {
    color: #fff;
    font-size: 0.9rem;
    font-weight: 500;
}

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

.skills-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.category-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.category-icon i {
    font-size: 1.2rem;
    color: var(--accent-light);
}

.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    padding-left: 16px;
}

.skill-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    transform: translateY(-50%);
}

.tech-stack-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tech-group h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 600;
}

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

.tech-tag {
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    transition: var(--transition);
    white-space: nowrap;
}

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

.tech-tag.highlight {
    background: var(--accent-glow);
    border-color: rgba(59, 130, 246, 0.2);
    color: var(--accent-light);
}

/* --- Experience / Timeline --- */
.timeline {
    position: relative;
    padding-left: 40px;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 60px;
}

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

.timeline-marker {
    position: absolute;
    left: -47px;
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.timeline-header {
    margin-bottom: 16px;
}

.timeline-header h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-company {
    display: inline-block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-light);
    margin-right: 16px;
}

.timeline-period {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-right: 16px;
}

.timeline-location {
    display: inline-block;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.timeline-location i {
    margin-right: 4px;
}

.timeline-summary {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.8;
}

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

.experience-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.exp-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.exp-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.exp-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.exp-card h4 i {
    color: var(--accent);
    margin-right: 8px;
}

.exp-subtitle {
    font-size: 0.8rem;
    color: var(--accent-light);
    margin-bottom: 12px;
    font-weight: 500;
}

.exp-card ul {
    list-style: none;
}

.exp-card li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 14px;
    position: relative;
    line-height: 1.6;
}

.exp-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 11px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

.exp-card li strong {
    color: var(--text-primary);
}

.client-logos h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 600;
}

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

.client-tags span {
    padding: 6px 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
}

/* --- Projects Section --- */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
    transition: var(--transition);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.project-card.featured {
    border-color: rgba(37, 99, 235, 0.25);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.04), rgba(8, 145, 178, 0.03));
}

.project-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.project-icon i {
    font-size: 1.2rem;
    color: var(--accent-light);
}

.project-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #10b981;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 50px;
}

.project-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.project-year {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.project-card > p:not(.project-year) {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

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

.project-tech span {
    padding: 4px 10px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--accent-light);
    background: var(--accent-glow);
    border-radius: 4px;
}

/* --- AI Development Section --- */
.ai-timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.ai-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

.ai-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

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

.ai-card-header i {
    font-size: 1.5rem;
    color: var(--accent-light);
}

.ai-badge {
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 50px;
}

.ai-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.ai-focus {
    font-size: 0.85rem;
    color: var(--accent-light);
    margin-bottom: 16px;
    font-weight: 500;
}

.ai-card ul {
    list-style: none;
}

.ai-card li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 14px;
    position: relative;
    line-height: 1.6;
}

.ai-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 11px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

/* --- Achievements Section --- */
.achievements {
    background: var(--bg-secondary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.achievement-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

.achievement-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.achievement-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievement-icon i {
    font-size: 1.3rem;
    color: var(--accent-light);
}

.achievement-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1.2;
    margin-bottom: 4px;
}

.achievement-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.achievement-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* --- Contact Section --- */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    color: inherit;
}

.contact-card i {
    font-size: 1.5rem;
    color: var(--accent-light);
}

.contact-type {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 600;
}

.contact-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-cta {
    margin-top: 8px;
}

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-name {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.footer-tagline {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-ai-credit {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 10px;
    opacity: 0.6;
    letter-spacing: 0.03em;
}

.footer-ai-credit i {
    margin-right: 4px;
    font-size: 0.65rem;
}

/* --- AI Generated Note (video caption) --- */
.ai-generated-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 8px;
    opacity: 0.7;
    font-style: italic;
}

.ai-generated-note i {
    margin-right: 4px;
    font-size: 0.7rem;
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
    .skills-categories,
    .projects-grid,
    .ai-timeline,
    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .experience-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: 24px;
    }

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

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

    .skills-categories,
    .projects-grid,
    .ai-timeline,
    .achievements-grid {
        grid-template-columns: 1fr;
    }

    .tech-stack {
        grid-template-columns: 1fr;
    }

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 40px;
    }

    .timeline {
        padding-left: 24px;
    }

    .timeline-marker {
        left: -31px;
        width: 12px;
        height: 12px;
    }
}

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

    .hero-stats {
        gap: 16px;
    }

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

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

    .stat-number {
        font-size: 1.3rem;
    }

    .exp-card {
        padding: 16px;
    }
}