/* ═══════════════════════════════════════════════════════════════
   Portfolio — Global Stylesheet
   Modern, clean design with glassmorphism, dark mode, animations
   ═══════════════════════════════════════════════════════════════ */

/* ─── Google Fonts ─────────────────────────────────────────── */
/* Fonts loaded via <link> tags in HTML <head> for better performance */

/* ─── CSS Variables / Design Tokens ─────────────────────────── */
:root {
    /* Colors */
    --primary: #0a192f;
    --primary-deep: #060f1f;
    --secondary: #112240;
    --surface: rgba(17, 34, 64, 0.7);
    --surface-hover: rgba(17, 34, 64, 0.9);
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #64ffda;
    --accent-dim: rgba(100, 255, 218, 0.15);
    --accent-glow: rgba(100, 255, 218, 0.3);
    --neon-blue: #3b82f6;
    --neon-purple: #8b5cf6;
    --neon-green: #10b981;
    --neon-pink: #ec4899;
    --neon-orange: #f97316;
    --border-glass: rgba(100, 255, 218, 0.15);
    --border-glass-hover: rgba(100, 255, 218, 0.35);

    /* Spacing */
    --nav-height: 72px;
    --section-gap: 6rem;

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

    /* Transitions */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px var(--accent-glow);
}

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

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

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

/* Styled scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-deep);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), var(--neon-blue));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--accent), var(--neon-purple));
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--primary-deep);
}

/* ─── Skip Link ──────────────────────────────────────────────── */
.skip-link {
    position: fixed;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 0 0 8px 8px;
    font-weight: 600;
    z-index: 10000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* ─── Scroll Progress Bar ───────────────────────────────────── */
.progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 9999;
    background: transparent;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--neon-blue), var(--neon-purple));
    transition: width 0.15s ease-out;
}

/* ─── Custom Cursor ──────────────────────────────────────────── */
.cursor-ring {
    display: none;
    width: 24px;
    height: 24px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9998;
    transition: width 0.2s, height 0.2s, border-color 0.2s;
    mix-blend-mode: difference;
}

.cursor-dot {
    display: none;
    width: 5px;
    height: 5px;
    background: var(--accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9998;
}

@media (min-width: 1024px) and (hover: hover) {

    .cursor-ring,
    .cursor-dot {
        display: block;
    }
}

/* ─── Page Loader ────────────────────────────────────────────── */
.loader-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(160deg, var(--secondary), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s var(--ease-out-expo);
}

.loader-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-ring {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.25rem;
    border-radius: 50%;
    background: conic-gradient(from 0deg, var(--accent), var(--neon-blue), var(--neon-purple), var(--neon-pink), var(--accent));
    mask: radial-gradient(circle 30px, transparent 32px, #000 33px);
    -webkit-mask: radial-gradient(circle 30px, transparent 32px, #000 33px);
    animation: spin 0.8s linear infinite;
}

.loader-text {
    font-weight: 800;
    font-size: clamp(1.5rem, 5vw, 3rem);
    text-align: center;
    background: linear-gradient(90deg, var(--accent), var(--neon-blue), var(--neon-purple), var(--neon-pink));
    background-size: 300% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient-shift 3s linear infinite;
}

.loader-sub {
    text-align: center;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.loader-dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 12px;
}

.loader-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: bounce-dot 0.8s infinite ease-in-out;
}

.loader-dots span:nth-child(2) {
    animation-delay: 0.15s;
    background: var(--neon-blue);
}

.loader-dots span:nth-child(3) {
    animation-delay: 0.3s;
    background: var(--neon-purple);
}

/* ─── Navigation ──────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: linear-gradient(135deg, rgba(10, 25, 47, 0.92), rgba(17, 34, 64, 0.95));
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
    transition: background 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--neon-blue));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: none;
    list-style: none;
    gap: 0.25rem;
    align-items: center;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.875rem;
    border-radius: 8px;
    transition: color 0.3s, background 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width 0.3s var(--ease-out-expo);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
    background: var(--accent-dim);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* Mobile menu toggle */
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--accent);
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

/* Mobile menu */
.mobile-menu {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(300px, 80vw);
    background: linear-gradient(160deg, var(--secondary), var(--primary));
    border-left: 2px solid var(--accent);
    z-index: 1001;
    padding: 2rem 1.5rem;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out-expo);
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.4);
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.mobile-menu-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

.close-menu {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s;
}

.close-menu:hover {
    transform: rotate(90deg);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mobile-menu-links a {
    display: block;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s;
}

.mobile-menu-links a:hover {
    color: var(--accent);
    background: var(--accent-dim);
    padding-left: 1.5rem;
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.mobile-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

/* ─── Sections ───────────────────────────────────────────────── */
.section {
    padding: var(--section-gap) 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-alt {
    background: rgba(17, 34, 64, 0.25);
}

.section-heading {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-heading h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--text);
    position: relative;
    display: inline-block;
    padding-bottom: 0.75rem;
}

.section-heading h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--neon-blue));
    border-radius: 2px;
    transition: width 0.6s var(--ease-out-expo);
}

.section-heading h2.visible::after {
    width: 60%;
}

.section-heading p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 1rem auto 0;
}

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0;
    animation: float-particle 20s infinite ease-in-out;
    will-change: transform, opacity;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1.5fr 1fr;
    }
}

.hero-text .greeting {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.hero-text h1 .cursor-blink::after {
    content: '|';
    animation: blink 1s step-end infinite;
    color: var(--accent);
    font-weight: 300;
}

.hero-text h2 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.hero-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-text p .highlight-blue {
    color: var(--neon-blue);
    font-weight: 600;
}

.hero-text p .highlight-purple {
    color: var(--neon-purple);
    font-weight: 600;
}

.hero-text p .highlight-green {
    color: var(--neon-green);
    font-weight: 600;
}

.hero-text p .highlight-pink {
    color: var(--neon-pink);
    font-weight: 600;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border: 2px solid var(--accent);
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.hero-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-dim);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease-out-expo);
}

.hero-cta:hover::before {
    transform: scaleX(1);
}

.hero-cta span {
    position: relative;
    z-index: 1;
}

.hero-cta:hover {
    box-shadow: var(--shadow-glow);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.hero-avatar-wrapper {
    position: relative;
    animation: gentle-float 5s ease-in-out infinite;
}

.hero-avatar {
    width: clamp(220px, 25vw, 320px);
    height: clamp(220px, 25vw, 320px);
    border-radius: 50%;
    border: 4px solid var(--accent);
    object-fit: cover;
    box-shadow: 0 0 30px var(--accent-glow);
    animation: pulse-glow 3s ease-in-out infinite alternate;
}

.hero-badge {
    position: absolute;
    bottom: -8px;
    right: -8px;
    background: var(--primary);
    border: 1px solid var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

/* ─── Glass Card (reusable) ──────────────────────────────────── */
.glass-card {
    background: var(--surface);
    backdrop-filter: blur(12px) saturate(150%);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.4s var(--ease-out-expo), box-shadow 0.4s, border-color 0.3s;
}

.glass-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), 0 0 20px var(--accent-glow);
    border-color: var(--border-glass-hover);
}

/* ─── About Section ──────────────────────────────────────────── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.about-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1rem;
}

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

.philosophy-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.philosophy-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.philosophy-list li i {
    color: var(--accent);
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* ─── Projects Section ────────────────────────────────────────── */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: var(--font-body);
}

.filter-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-dim);
}

.filter-btn.active {
    color: var(--primary);
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 600;
}

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

@media (max-width: 400px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s var(--ease-out-expo);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: var(--shadow-lg), 0 0 25px var(--accent-glow);
    border-color: var(--border-glass-hover);
}

.project-card-preview {
    height: 200px;
    background: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-card-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out-expo);
}

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

/* Iframe card preview */
.iframe-preview-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.iframe-preview-wrapper iframe {
    width: 200%;
    height: 400%;
    transform: scale(0.5);
    transform-origin: top left;
    border: none;
    pointer-events: none;
}

.iframe-overlay {
    position: absolute;
    inset: 0;
    cursor: pointer;
}

.project-card-preview .placeholder-icon {
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.5;
}

.project-card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-card-category {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--neon-pink);
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}

.project-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.project-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.3rem 0.7rem;
    border-radius: 100px;
    background: rgba(17, 34, 64, 0.9);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    transition: all 0.3s;
}

.tech-badge:hover {
    background: var(--accent-dim);
    color: var(--accent);
    border-color: var(--accent);
}

.project-card-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: gap 0.3s;
    margin-top: auto;
}

.project-card-link:hover {
    gap: 0.75rem;
}

.project-card-link i {
    transition: transform 0.3s;
}

.project-card-link:hover i {
    transform: translateX(4px);
}

/* Project Detail Modal */
.project-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.project-modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.project-modal {
    background: var(--secondary);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.4s var(--ease-out-expo);
    box-shadow: var(--shadow-lg);
}

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

.project-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-glass);
}

.project-modal-header h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: color 0.3s, background 0.3s;
}

.modal-close-btn:hover {
    color: var(--accent);
    background: var(--accent-dim);
}

.project-modal-body {
    padding: 2rem;
}

.project-modal-iframe {
    width: 100%;
    height: 400px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    margin-bottom: 1.5rem;
}

.project-modal-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.project-modal-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    color: var(--text-secondary);
    padding: 0.35rem 0;
}

.project-modal-features li i {
    color: var(--accent);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.project-modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--accent);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.95rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s var(--ease-out-expo);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid var(--accent);
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--accent-dim);
    transform: translateY(-2px);
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--neon-blue), var(--neon-purple));
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 2.5rem 2.5rem;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: 3rem;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 3rem;
}

.timeline-dot {
    position: absolute;
    top: 1rem;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border: 3px solid var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--accent-glow);
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -9px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -9px;
}

.timeline-card {
    text-align: left;
}

.timeline-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.35rem;
}

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

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

.timeline-card ul li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 0.2rem 0;
}

.timeline-card ul li i {
    color: var(--accent);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding: 0 1rem 2rem 3.5rem;
        text-align: left;
    }

    .timeline-item:nth-child(odd) {
        padding-right: 1rem;
    }

    .timeline-dot {
        left: 11px !important;
        right: auto !important;
    }
}

/* ─── Skills ──────────────────────────────────────────────────── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.skill-category h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--neon-pink);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.skill-tag {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0.875rem;
    border-radius: 100px;
    border: 1px solid transparent;
    background: rgba(226, 232, 240, 0.05);
    color: var(--text-secondary);
    transition: all 0.3s;
}

.skill-tag:hover {
    transform: translateY(-2px);
}

.skill-tag.blue {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
}

.skill-tag.blue:hover {
    background: var(--neon-blue);
    color: var(--primary);
}

.skill-tag.purple {
    border-color: var(--neon-purple);
    color: var(--neon-purple);
}

.skill-tag.purple:hover {
    background: var(--neon-purple);
    color: var(--primary);
}

.skill-tag.green {
    border-color: var(--neon-green);
    color: var(--neon-green);
}

.skill-tag.green:hover {
    background: var(--neon-green);
    color: var(--primary);
}

.skill-tag.orange {
    border-color: var(--neon-orange);
    color: var(--neon-orange);
}

.skill-tag.orange:hover {
    background: var(--neon-orange);
    color: var(--primary);
}

.skill-tag.pink {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
}

.skill-tag.pink:hover {
    background: var(--neon-pink);
    color: var(--primary);
}

.typing-highlight {
    color: var(--neon-pink);
    font-weight: 700;
}

/* ─── Education ───────────────────────────────────────────────── */
.education-grid {
    display: grid;
    gap: 1.5rem;
}

.education-primary {
    grid-column: 1 / -1;
}

.education-secondary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 640px) {
    .education-secondary {
        grid-template-columns: 1fr;
    }
}

.education-card .icon-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--accent);
    font-size: 1.25rem;
}

.education-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.education-card .institution {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

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

/* ─── Credentials ─────────────────────────────────────────────── */
.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* ─── Interests ───────────────────────────────────────────────── */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.interest-card {
    text-align: center;
    padding: 2rem 1rem;
    --card-color: var(--neon-blue);
}

.interest-card:nth-child(2) {
    --card-color: var(--neon-green);
}

.interest-card:nth-child(3) {
    --card-color: var(--neon-purple);
}

.interest-card:nth-child(4) {
    --card-color: var(--neon-pink);
}

.interest-card:hover {
    box-shadow: var(--shadow-lg), 0 0 20px color-mix(in srgb, var(--card-color) 30%, transparent);
}

.interest-card svg,
.interest-card i {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 2.5rem;
    color: var(--card-color);
    margin-bottom: 1rem;
    transition: transform 0.3s, filter 0.3s;
}

.interest-card:hover svg,
.interest-card:hover i {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 8px var(--card-color));
}

.interest-card h3 {
    font-size: 1rem;
    font-weight: 600;
}

/* ─── Footer / Contact ────────────────────────────────────────── */
.footer {
    text-align: center;
    padding: 5rem 1.5rem 3rem;
    background: linear-gradient(180deg, var(--primary), var(--primary-deep));
}

.footer h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
    padding-bottom: 0.75rem;
}

.footer h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--neon-blue));
    border-radius: 2px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 540px;
    margin: 1.5rem auto 2.5rem;
    line-height: 1.8;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.social-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: rgba(226, 232, 240, 0.04);
    border: 1px solid transparent;
    transition: all 0.3s var(--ease-spring);
    font-size: 1.25rem;
    text-decoration: none;
}

.social-icon:hover {
    transform: translateY(-5px) scale(1.1);
    border-color: currentColor;
    box-shadow: 0 8px 20px currentColor;
}

.social-icon.linkedin:hover {
    color: #0A66C2;
}

.social-icon.github:hover {
    color: var(--neon-purple);
}

.social-icon.email:hover {
    color: #ea4335;
}

.social-icon.instagram:hover {
    color: #E4405F;
}

.social-icon.facebook:hover {
    color: #1877F2;
}

.social-icon.reddit:hover {
    color: #FF4500;
}

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

.footer-made {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.footer-heart {
    color: var(--neon-pink);
}

/* ─── Animations ──────────────────────────────────────────────── */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

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

@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 100% 50%;
    }
}

@keyframes gentle-float {

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

    50% {
        transform: translateY(-12px);
    }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 15px var(--accent-glow);
    }

    100% {
        box-shadow: 0 0 35px var(--accent-glow), 0 0 60px rgba(100, 255, 218, 0.1);
    }
}

@keyframes float-particle {

    0%,
    100% {
        transform: translateY(10vh) scale(0.5) translateX(0);
        opacity: 0;
    }

    10%,
    90% {
        opacity: 0.4;
    }

    50% {
        transform: translateY(-15vh) scale(1.2) translateX(var(--drift, 0));
        opacity: 0.6;
    }
}

@keyframes bounce-dot {

    0%,
    80%,
    100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    40% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

/* ─── Scroll Reveal (JS-driven) ──────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ─── Utility ─────────────────────────────────────────────────── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-accent {
    color: var(--accent);
}

.text-muted {
    color: var(--text-secondary);
}

.font-mono {
    font-family: var(--font-mono);
}

/* ─── Responsive Polish ──────────────────────────────────────── */
@media (max-width: 480px) {
    .section {
        padding: 3.5rem 1rem;
    }

    .glass-card {
        padding: 1.25rem;
    }
}