/* ============================================
   DESIGN SYSTEM — Bikal Shrestha Portfolio
   Unified dark-first with animated gradients,
   noise texture, glassmorphism, and depth
   ============================================ */

/* ---------- CSS Variables (Design Tokens) ---------- */
:root {
    --bg-primary: #04040a;
    --bg-secondary: #0a0a14;
    --bg-tertiary: #10101c;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-nav: rgba(4, 4, 10, 0.82);

    --text-primary: #f0f0f5;
    --text-secondary: #8b8ba0;
    --text-muted: #52526a;

    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    /* Violet → Blue → Cyan accent system */
    --accent-violet: #8b5cf6;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;

    --gradient-accent: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 50%, #06b6d4 100%);
    --gradient-accent-hover: linear-gradient(135deg, #a78bfa 0%, #60a5fa 50%, #22d3ee 100%);

    --glow-color: rgba(139, 92, 246, 0.15);
    --shadow-color: rgba(0, 0, 0, 0.5);

    --section-gap: 7rem;
    --container-width: 1100px;
    --nav-height: 72px;
    --border-radius: 20px;
    --border-radius-sm: 12px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    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;
    position: relative;
}

/* Film grain noise overlay — adds depth */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.02;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

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

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

/* ---------- Utility Classes ---------- */
.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Animated gradient border card (glassmorphism) */
.glass-card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius);
    padding: 1px;
    background: linear-gradient(135deg, transparent 25%, rgba(139, 92, 246, 0.2) 45%, rgba(59, 130, 246, 0.15) 60%, rgba(6, 182, 212, 0.2) 75%, transparent 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

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

.glass-card:hover {
    transform: translateY(-6px);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 60px -20px rgba(139, 92, 246, 0.2);
}

.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-violet);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    padding: 0.35rem 1rem;
    background: rgba(139, 92, 246, 0.08);
    border-radius: 999px;
    border: 1px solid rgba(139, 92, 246, 0.15);
}

/* ---------- Reveal Animations ---------- */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ---------- NAVIGATION ---------- */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(24px) saturate(1.5);
    -webkit-backdrop-filter: blur(24px) saturate(1.5);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.75rem;
    font-weight: 900;
    letter-spacing: -1px;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-normal);
    letter-spacing: 0.02em;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    border-color: var(--accent-violet);
    color: var(--accent-violet);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
}

/* Dark-only: show moon icon */
.icon-sun { display: none; }
.icon-moon { display: block; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.hamburger span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.hamburger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
}
.hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- HERO ---------- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
    overflow: hidden;
}

/* Animated mesh gradient background */
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(139, 92, 246, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 50% 60% at 60% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 50%);
    animation: meshMove 12s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes meshMove {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.1) rotate(2deg); }
}

/* Grid pattern overlay */
.hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    opacity: 0.5;
}

.hero-content {
    max-width: var(--container-width);
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-violet);
    margin-bottom: 1rem;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(3.5rem, 9vw, 6.5rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -3px;
    margin-bottom: 1.25rem;
}

.hero-title-wrapper {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-bottom: 1.75rem;
    min-height: 2.5rem;
}

.hero-title {
    font-size: 1.35rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
    font-weight: 400;
}

.cursor {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-violet);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    line-height: 1.85;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.hero-socials {
    display: flex;
    gap: 0.75rem;
}

.hero-socials a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    color: var(--text-muted);
    transition: all var(--transition-normal);
    position: relative;
}

.hero-socials a::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 14px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.hero-socials a:hover {
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
}

.hero-socials a:hover::before {
    opacity: 1;
}

.hero-glow {
    position: absolute;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, rgba(6, 182, 212, 0.05) 40%, transparent 70%);
    top: 5%;
    right: -15%;
    border-radius: 50%;
    pointer-events: none;
    animation: float 10s ease-in-out infinite;
    filter: blur(40px);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-40px, 30px) scale(1.05); }
    66% { transform: translate(20px, -20px) scale(0.95); }
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    letter-spacing: 0.02em;
    position: relative;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-violet), var(--accent-blue));
    color: #fff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(139, 92, 246, 0.45);
}

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

.btn-outline:hover {
    border-color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.06);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.15);
}

.btn-small {
    padding: 0.65rem 1.5rem;
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-small:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-large {
    padding: 1.1rem 3rem;
    font-size: 1rem;
    border-radius: 16px;
}

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

/* Alternating section backgrounds for depth */
.section:nth-of-type(even) {
    background: var(--bg-secondary);
}

/* Section divider glow line */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(80%, 600px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color) 20%, rgba(139, 92, 246, 0.2) 50%, var(--border-color) 80%, transparent);
}

.section-title {
    font-size: clamp(2.25rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 3.5rem;
}

/* ---------- ABOUT ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

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

.about-text .btn {
    margin-top: 1rem;
}

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

.stat-card {
    padding: 1.75rem;
    text-align: center;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--accent-violet);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.1);
    transform: translateY(-4px);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
    margin-bottom: 0.35rem;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ---------- EXPERIENCE ---------- */
.timeline {
    position: relative;
    padding-left: 3.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-violet), var(--accent-blue), var(--accent-cyan));
    border-radius: 2px;
    opacity: 0.5;
}

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

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

.timeline-dot {
    position: absolute;
    left: -3.5rem;
    top: 2rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-violet);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px var(--accent-violet), 0 0 20px rgba(139, 92, 246, 0.4);
    z-index: 1;
    transform: translateX(calc(-50% + 8px));
}

.timeline-card {
    padding: 2rem 2.5rem;
}

.timeline-date {
    font-size: 0.78rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-violet);
    font-weight: 500;
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(139, 92, 246, 0.08);
    border-radius: 6px;
    margin-bottom: 0.75rem;
}

.timeline-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.timeline-company {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.timeline-card > p:last-child {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ---------- SKILLS ---------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.skill-category {
    padding: 2rem;
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.skill-category-header svg {
    color: var(--accent-violet);
    flex-shrink: 0;
}

.skill-category-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    padding: 0.4rem 0.85rem;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    background: var(--bg-card);
    transition: all var(--transition-normal);
    cursor: default;
}

.skill-tag:hover {
    border-color: var(--accent-violet);
    color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.06);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
}

/* ---------- PROJECTS ---------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    cursor: default;
    display: flex;
    flex-direction: column;
}

.project-image {
    position: relative;
    width: 100%;
    height: 260px;
    overflow: hidden;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform 8s ease, filter 0.4s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.08);
    object-position: center;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(4, 4, 10, 0.95) 0%, rgba(4, 4, 10, 0.3) 50%, rgba(4, 4, 10, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-info {
    padding: 1.75rem 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.project-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    flex: 1;
    line-height: 1.7;
}

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

.project-tags span {
    padding: 0.3rem 0.7rem;
    font-size: 0.7rem;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    border-radius: 8px;
    background: rgba(139, 92, 246, 0.08);
    color: var(--accent-violet);
    border: 1px solid rgba(139, 92, 246, 0.15);
}

/* ---------- CONTACT ---------- */
#contact {
    background: var(--bg-tertiary);
    position: relative;
    overflow: hidden;
}

/* Animated gradient orb behind contact */
#contact::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
    top: -20%;
    left: -10%;
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
    pointer-events: none;
}

.contact-container {
    text-align: center;
    position: relative;
    z-index: 1;
}

.contact-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.contact-container .btn-large {
    margin-bottom: 4rem;
}

.contact-socials {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.social-link:hover {
    color: var(--text-primary);
    border-color: var(--accent-violet);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(139, 92, 246, 0.15);
}

.social-link svg {
    flex-shrink: 0;
    color: var(--accent-violet);
}

/* ---------- FOOTER ---------- */
footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 1.5rem;
    text-align: center;
    background: var(--bg-primary);
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
}

footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    border-color: var(--accent-violet);
    color: var(--accent-violet);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.2);
}

/* ---------- RESPONSIVE ---------- */

/* --- Tablet (1024px) --- */
@media (max-width: 1024px) {
    :root {
        --section-gap: 5rem;
    }

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

    .about-stats {
        grid-template-columns: repeat(4, 1fr);
    }

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

/* --- Mobile (768px) --- */
@media (max-width: 768px) {
    :root {
        --section-gap: 3.5rem;
        --nav-height: 60px;
        --border-radius: 14px;
    }

    /* Mobile nav overlay — display:none/flex with opaque background */
    .nav-links {
        display: none !important;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: #04040a;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        z-index: 999;
    }

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

    .nav-link {
        font-size: 1.5rem;
        font-weight: 600;
        color: var(--text-primary);
        padding: 0.75rem 0;
    }

    .nav-link::after {
        display: none;
    }

    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .nav-logo {
        z-index: 1001;
    }

    /* Hero */
    .hero-section {
        min-height: auto;
        padding: calc(var(--nav-height) + 2rem) 1.25rem 3rem;
    }

    .hero-name {
        font-size: clamp(2.5rem, 12vw, 3.5rem);
        letter-spacing: -2px;
    }

    .hero-greeting {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 2rem;
    }

    .hero-cta {
        margin-bottom: 2.5rem;
    }

    .hero-socials a {
        width: 42px;
        height: 42px;
    }

    .hero-glow {
        width: 350px;
        height: 350px;
        top: 10%;
        right: -30%;
    }

    .hero-section::after {
        background-size: 40px 40px;
    }

    /* Sections */
    .section-container {
        padding: 0 1.25rem;
    }

    .section-title {
        font-size: clamp(1.75rem, 7vw, 2.25rem);
        margin-bottom: 2rem;
        letter-spacing: -1px;
    }

    /* About */
    .about-text p {
        font-size: 0.95rem;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .stat-card {
        padding: 1.25rem 0.75rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    /* Experience */
    .timeline {
        padding-left: 2rem;
    }

    .timeline-dot {
        left: -2rem;
        width: 12px;
        height: 12px;
        transform: translateX(calc(-50% + 6px));
    }

    .timeline-card {
        padding: 1.5rem;
    }

    .timeline-card h3 {
        font-size: 1.1rem;
    }

    .timeline-card > p:last-child {
        font-size: 0.88rem;
    }

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

    .skill-category {
        padding: 1.5rem;
    }

    .skill-tag {
        font-size: 0.72rem;
        padding: 0.35rem 0.7rem;
    }

    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-image {
        height: 200px;
    }

    .project-info {
        padding: 1.25rem 1.5rem;
    }

    .project-info h3 {
        font-size: 1.05rem;
    }

    .project-info p {
        font-size: 0.85rem;
    }

    /* Contact */
    .contact-description {
        font-size: 1rem;
    }

    .contact-socials {
        flex-direction: column;
        align-items: center;
    }

    .social-link {
        width: 100%;
        max-width: 320px;
        justify-content: center;
        padding: 0.85rem 1.5rem;
    }

    /* Buttons */
    .btn {
        padding: 0.75rem 1.75rem;
        font-size: 0.82rem;
    }

    .btn-large {
        padding: 0.95rem 2rem;
        font-size: 0.88rem;
    }

    /* Back to top */
    .back-to-top {
        bottom: 1.25rem;
        right: 1.25rem;
        width: 40px;
        height: 40px;
        border-radius: 12px;
    }
}

/* --- Small Mobile (480px) --- */
@media (max-width: 480px) {
    .hero-section {
        padding: calc(var(--nav-height) + 1.5rem) 1rem 2.5rem;
    }

    .hero-name {
        font-size: clamp(2rem, 13vw, 2.8rem);
        letter-spacing: -1.5px;
    }

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

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

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

    .section-container {
        padding: 0 1rem;
    }

    .about-stats {
        gap: 0.6rem;
    }

    .stat-card {
        padding: 1rem 0.6rem;
    }

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

    .timeline {
        padding-left: 1.75rem;
    }

    .timeline::before {
        left: 5px;
    }

    .timeline-dot {
        left: -1.75rem;
        width: 10px;
        height: 10px;
        transform: translateX(calc(-50% + 5px));
    }

    .timeline-card {
        padding: 1.25rem;
    }

    .project-image {
        height: 180px;
    }

    .project-tags span {
        font-size: 0.65rem;
        padding: 0.25rem 0.6rem;
    }

    .nav-link {
        font-size: 1.3rem;
    }

    .social-link {
        max-width: 100%;
    }
}

/* --- Extra Small (320px) --- */
@media (max-width: 360px) {
    .hero-name {
        font-size: 2rem;
    }

    .hero-greeting {
        font-size: 0.75rem;
    }

    .hero-title {
        font-size: 0.88rem;
    }

    .hero-description {
        font-size: 0.88rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .about-text p {
        font-size: 0.88rem;
    }

    .skill-tag {
        font-size: 0.68rem;
        padding: 0.3rem 0.6rem;
    }

    .timeline-card h3 {
        font-size: 1rem;
    }

    .btn {
        padding: 0.7rem 1.25rem;
        font-size: 0.78rem;
    }
}