/* ============================================
   MOHAMED SHEREF — Portfolio Styles
   Dark Theme × Glassmorphism × Micro-animations
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ── */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-hover: rgba(255, 255, 255, 0.15);

    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #555570;

    --accent-cyan: #00d4ff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --gradient-main: linear-gradient(135deg, #00d4ff, #a855f7);
    --gradient-warm: linear-gradient(135deg, #a855f7, #ec4899);
    --gradient-subtle: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(168, 85, 247, 0.15));

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow-cyan: 0 0 30px rgba(0, 212, 255, 0.15);
    --shadow-glow-purple: 0 0 30px rgba(168, 85, 247, 0.15);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-cyan) var(--bg-secondary);
}

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

::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 3px;
}

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

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

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

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

/* ── Canvas Background ── */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ── Navigation ── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transition: all var(--transition-smooth);
}

.navbar.scrolled {
    padding: 0.7rem 2rem;
    background: rgba(10, 10, 15, 0.9);
}

.nav-logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 0.3rem 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: width var(--transition-smooth);
    border-radius: 1px;
}

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

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

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ── Hero Section ── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 6rem 2rem 4rem;
}

/* ── Hero Avatar ── */
.hero-avatar {
    position: relative;
    width: 130px;
    height: 130px;
    margin: 0 auto 1.5rem;
    opacity: 0;
    transform: scale(0.8);
    animation: avatarPop 0.8s ease forwards 0.1s;
}

.avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 2;
    border: 3px solid var(--bg-primary);
}

.avatar-ring {
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink), var(--accent-cyan));
    z-index: 1;
    animation: spinRing 4s linear infinite;
}

.avatar-ring::after {
    content: '';
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: var(--bg-primary);
}

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

@keyframes avatarPop {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-name .gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards 0.8s;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-smooth);
}

.btn-primary {
    background: var(--gradient-main);
    color: #000;
    box-shadow: var(--shadow-glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px rgba(0, 212, 255, 0.3);
    color: #000;
}

.btn-outline {
    border: 1px solid var(--border-glass-hover);
    color: var(--text-primary);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.08);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.hero-scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-line {
    width: 1px;
    height: 30px;
    background: linear-gradient(to bottom, var(--accent-cyan), transparent);
}

/* ── Section Shared Styles ── */
section {
    position: relative;
    z-index: 1;
    padding: 6rem 2rem;
}

.section-container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 4rem;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 0.8rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

/* ── Reveal Animations ── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

.reveal-delay-4 {
    transition-delay: 0.4s;
}

/* ── About Section ── */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-text p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
    margin-top: 2rem;
}

.stat-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.2rem;
    text-align: center;
    transition: all var(--transition-smooth);
}

.stat-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-cyan);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.interest-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.interest-tag {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.9rem 1.2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-smooth);
}

.interest-tag:hover {
    border-color: var(--accent-purple);
    background: rgba(168, 85, 247, 0.06);
    color: var(--text-primary);
    transform: translateX(5px);
}

.interest-tag .icon {
    font-size: 1.3rem;
}

/* ── Skills Section ── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.8rem;
    margin-top: 2rem;
}

.skill-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-smooth);
    white-space: nowrap;
}

.skill-pill:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

/* ── Projects Section ── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-smooth);
    cursor: pointer;
}

.project-card:hover {
    border-color: var(--border-glass-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

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

.project-img {
    width: 100%;
    height: 210px;
    overflow: hidden;
    position: relative;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.project-img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(10, 10, 15, 0.9));
}

.project-body {
    padding: 1.4rem 1.6rem 1.6rem;
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.6rem;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.7rem;
}

.project-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.project-tag {
    padding: 0.25rem 0.65rem;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-xl);
    font-size: 0.72rem;
    color: var(--accent-cyan);
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 0.8rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-cyan);
}

.project-link svg {
    width: 16px;
    height: 16px;
}

/* ── Project Modal ── */
.project-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
}

.project-modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.project-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    max-width: 720px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-spring);
}

.project-modal-overlay.active .project-modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    position: relative;
}

.modal-header img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: var(--accent-cyan);
}

.modal-body {
    padding: 2rem;
}

.modal-body .project-category {
    margin-bottom: 0.5rem;
}

.modal-body .project-title {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.modal-body .project-desc {
    display: block;
    -webkit-line-clamp: unset;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.modal-highlights {
    list-style: none;
    margin-bottom: 1.5rem;
}

.modal-highlights li {
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
}

.modal-highlights li::before {
    content: '▹';
    color: var(--accent-cyan);
    font-weight: bold;
    flex-shrink: 0;
}

/* ── Experience Timeline ── */
.timeline {
    position: relative;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple), transparent);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.65rem;
    top: 0.4rem;
    width: 12px;
    height: 12px;
    background: var(--accent-cyan);
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    margin-bottom: 0.4rem;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.timeline-org {
    font-size: 0.9rem;
    color: var(--accent-purple);
    margin-bottom: 0.6rem;
}

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

.timeline-desc li {
    margin-bottom: 0.4rem;
    padding-left: 1rem;
    position: relative;
}

.timeline-desc li::before {
    content: '–';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

/* ── Education Card ── */
.education-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.edu-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.edu-details h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.edu-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.edu-details .gpa {
    display: inline-flex;
    gap: 1rem;
    margin-top: 0.6rem;
}

.gpa-badge {
    padding: 0.3rem 0.8rem;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-weight: 600;
}

/* ── Awards ── */
.awards-list {
    display: grid;
    gap: 1rem;
}

.award-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: all var(--transition-smooth);
}

.award-item:hover {
    border-color: var(--accent-purple);
    transform: translateX(5px);
}

.award-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.award-text h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.award-text p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    transition: opacity var(--transition-fast);
}

.contact-email:hover {
    opacity: 0.8;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-smooth);
}

.social-link:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.contact-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.contact-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.contact-info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-info-list li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-info-list .info-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    flex-shrink: 0;
}

/* ── Footer ── */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-size: 0.82rem;
}

.footer span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* ── Keyframes ── */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {

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

    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

@keyframes float {

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

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

/* ── Responsive ── */
@media (max-width: 900px) {

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

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

@media (max-width: 640px) {
    section {
        padding: 4rem 1.2rem;
    }

    .navbar {
        padding: 0.8rem 1.2rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-glass);
        padding: 1rem 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        display: block;
        padding: 0.8rem 1.5rem;
    }

    .nav-hamburger {
        display: flex;
    }

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

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

    .education-card {
        flex-direction: column;
        text-align: center;
    }

    .modal-header img {
        height: 180px;
    }

    .project-modal {
        margin: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}