/* ============================================================
   Mihir Khare — Portfolio
   Aesthetic: editorial engineer. Warm near-black canvas, a single
   electric-lime accent, blueprint grid + film grain, distinctive
   type system (Bricolage Grotesque / Hanken Grotesk / JetBrains Mono).
   ============================================================ */

/* ============================================
   Design Tokens
   ============================================ */
:root {
    /* Surfaces — warm near-black, not navy */
    --bg: #0a0a0b;
    --bg-2: #0e0e10;
    --bg-3: #131316;
    --bg-darker: #060607;

    /* Ink — warm cream, not pure white */
    --color-text-primary: #f5f3ee;
    --color-text-secondary: #b9b7af;
    --color-text-muted: #79776f;

    /* The one accent. Electric lime. Used sparingly, with intent. */
    --accent: #c5f82a;
    --accent-dim: #9bc81f;
    --accent-soft: rgba(197, 248, 42, 0.12);
    --accent-line: rgba(197, 248, 42, 0.32);

    /* Hairlines & glass */
    --line: rgba(245, 243, 238, 0.08);
    --line-strong: rgba(245, 243, 238, 0.16);
    --glass: rgba(245, 243, 238, 0.022);
    --glass-hover: rgba(245, 243, 238, 0.05);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 7rem;

    /* Typography */
    --font-primary: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Bricolage Grotesque', 'Hanken Grotesk', Georgia, serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

    --font-size-xs: 0.8125rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 2.75rem;
    --font-size-3xl: 3.75rem;
    --font-size-4xl: 5.5rem;

    /* Radius — crisp, not pill-soft */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.45);
    --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.55);

    /* Transitions */
    --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);

    /* Z-Index Layers */
    --z-particles: -2;
    --z-grain: 9999;
    --z-base: 1;
    --z-navbar: 100;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
    background-color: var(--bg);
    /* Blueprint grid woven into the canvas + a single warm glow */
    background-image:
        radial-gradient(120% 70% at 80% -10%, rgba(197, 248, 42, 0.06), transparent 60%),
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 100% 100%, 64px 64px, 64px 64px;
    background-attachment: fixed;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* Film grain — the texture that kills the "flat AI gradient" feeling */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: var(--z-grain);
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
    background-color: var(--accent);
    color: #0a0a0b;
}

a { color: inherit; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--bg-darker); }
::-webkit-scrollbar-thumb {
    background: #26261f;
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-darker);
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

/* Editorial section headers — mono index marker + heavy display title */
.section-title {
    font-family: var(--font-display);
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.02;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-top: var(--spacing-md);
    display: block;
}

.section-title::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 56px;
    height: 4px;
    background: var(--accent);
    border-radius: var(--radius-full);
    box-shadow: 0 0 24px rgba(197, 248, 42, 0.5);
}

.section-subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    max-width: 560px;
    margin: calc(var(--spacing-xl) * -0.6) 0 var(--spacing-xl);
}

/* ============================================
   Particle Background
   ============================================ */
#particles-js {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-particles);
    background: transparent;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navbar);
    padding: var(--spacing-md) 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 11, 0.72);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border-bottom: 1px solid var(--line);
    padding: var(--spacing-sm) 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
}

.nav-brand::before {
    content: '~/';
    color: var(--accent);
    margin-right: 2px;
}

.nav-brand:hover { color: var(--accent); }

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 2;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--color-text-primary);
    margin: 3px 0;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: var(--font-size-xs);
    letter-spacing: 0.01em;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 2px;
}

.nav-menu li a i {
    margin-right: 6px;
    font-size: 0.75em;
    color: var(--accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.nav-menu li a:hover i,
.nav-menu li a.active i { opacity: 1; }

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

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

/* ============================================
   Hero
   ============================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.35fr 0.9fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: var(--z-base);
}

.hero-content {
    text-align: left;
    position: relative;
    z-index: var(--z-base);
}

/* Portrait */
.hero-portrait {
    position: relative;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.hero-portrait-frame {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--line-strong);
    background: var(--bg-3);
    box-shadow: var(--shadow-xl);
    aspect-ratio: 4 / 5;
}

.hero-portrait-frame::before {
    /* corner bracket accent */
    content: '';
    position: absolute;
    inset: 10px;
    border: 1px solid var(--accent-line);
    border-radius: calc(var(--radius-xl) - 8px);
    pointer-events: none;
    z-index: 3;
    mask:
        linear-gradient(#000 0 0) top left / 28px 28px no-repeat,
        linear-gradient(#000 0 0) top right / 28px 28px no-repeat,
        linear-gradient(#000 0 0) bottom left / 28px 28px no-repeat,
        linear-gradient(#000 0 0) bottom right / 28px 28px no-repeat;
    -webkit-mask:
        linear-gradient(#000 0 0) top left / 28px 28px no-repeat,
        linear-gradient(#000 0 0) top right / 28px 28px no-repeat,
        linear-gradient(#000 0 0) bottom left / 28px 28px no-repeat,
        linear-gradient(#000 0 0) bottom right / 28px 28px no-repeat;
}

.hero-portrait-frame::after {
    /* duotone wash to seat the photo into the palette */
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, transparent 55%, rgba(10, 10, 11, 0.55) 100%),
        radial-gradient(120% 90% at 100% 0, var(--accent-soft), transparent 55%);
    z-index: 2;
    pointer-events: none;
}

.hero-portrait-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 18%;
    display: block;
    filter: grayscale(0.18) contrast(1.04);
    transition: filter var(--transition-slow), transform var(--transition-slow);
}

.hero-portrait:hover .hero-portrait-frame img {
    filter: grayscale(0) contrast(1.06);
    transform: scale(1.03);
}

.hero-portrait-status {
    position: absolute;
    left: 16px;
    bottom: 16px;
    z-index: 4;
    display: inline-flex;
    align-items: center;
    gap: 0.6ch;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-full);
    background: rgba(10, 10, 11, 0.7);
    backdrop-filter: blur(8px);
    border: 1px solid var(--line-strong);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
}

.hero-portrait-status i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
    animation: pulse 2s infinite;
}

.hero-portrait-meta {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.45; transform: scale(0.82); }
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.04em;
    display: inline-flex;
    align-items: center;
    gap: 0.6ch;
    animation: fadeInUp 0.7s ease backwards;
}

.hero-greeting::before {
    content: '01 //';
    color: var(--color-text-muted);
}

.hero-name {
    font-family: var(--font-display);
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 0.92;
    letter-spacing: -0.045em;
    animation: fadeInUp 0.7s ease 0.08s backwards;
}

.hero-name span {
    color: var(--accent);
    position: relative;
}

.hero-title {
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.7s ease 0.16s backwards;
}

.hero-title::before {
    content: '> ';
    color: var(--accent);
}

.hero-tagline {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    display: none; /* redundant with title in this data set; keep DOM, hide visually */
}

.hero-summary {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 0 var(--spacing-lg);
    line-height: 1.6;
    font-weight: 300;
    animation: fadeInUp 0.7s ease 0.24s backwards;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
    max-width: 760px;
    animation: fadeInUp 0.7s ease 0.32s backwards;
}

.highlight-item {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.highlight-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-normal);
}

.highlight-item:hover {
    transform: translateY(-4px);
    background: var(--glass-hover);
    border-color: var(--line-strong);
}

.highlight-item:hover::before { transform: scaleY(1); }

.highlight-item i {
    font-size: var(--font-size-lg);
    min-width: 32px;
    color: var(--accent) !important; /* override per-item rainbow inline colors */
}

.highlight-item span {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin: var(--spacing-lg) 0;
    animation: fadeInUp 0.7s ease 0.4s backwards;
}

/* Buttons */
.btn {
    padding: 0.85rem 1.6rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: var(--font-size-xs);
    letter-spacing: 0.01em;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.6ch;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid transparent;
    position: relative;
}

.btn-primary {
    background: var(--accent);
    color: #0a0a0b;
    font-weight: 700;
    box-shadow: 0 6px 24px rgba(197, 248, 42, 0.18);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 34px rgba(197, 248, 42, 0.32);
    background: #d4ff45;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--line-strong);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

.hero-social {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0 0;
    animation: fadeInUp 0.7s ease 0.48s backwards;
}

.social-link {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-sm);
    background: var(--glass);
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.social-link:hover {
    transform: translateY(-4px);
    background: var(--accent-soft);
    border-color: var(--accent-line);
    color: var(--accent);
}

.scroll-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
    margin-top: var(--spacing-2xl);
    animation: fadeInUp 0.7s ease 0.56s backwards;
}

.scroll-indicator i { animation: bounce 2s infinite; color: var(--accent); }

/* Hero ambient orbs — recolored, calmer */
.hero-decoration {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(110px);
    opacity: 0.16;
    animation: float 26s infinite;
}

.orb-1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    top: -240px;
    right: -120px;
    opacity: 0.12;
}

.orb-2 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, #3a5a12 0%, transparent 70%);
    bottom: -160px;
    left: -120px;
    animation-delay: -8s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    top: 40%;
    left: 35%;
    opacity: 0.06;
    animation-delay: -14s;
}

/* ============================================
   About
   ============================================ */
.about-section { background: var(--bg-2); border-top: 1px solid var(--line); }

.about-content {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: start;
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about-text p {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    color: var(--color-text-secondary);
    font-weight: 300;
}

.about-text p:first-child::first-letter {
    font-family: var(--font-display);
    font-size: 3.4em;
    font-weight: 800;
    float: left;
    line-height: 0.74;
    margin: 0.08em 0.12em 0 0;
    color: var(--accent);
}

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

.stat-card {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg) var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(120% 100% at 0 0, var(--accent-soft), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-line);
}

.stat-card:hover::after { opacity: 1; }

.stat-card i {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--accent) !important;
    display: block;
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    display: block;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.about-actions {
    margin-top: var(--spacing-lg);
}

/* ============================================
   Experience — single left rail timeline
   ============================================ */
.timeline {
    position: relative;
    max-width: 820px;
    margin: 0;
    padding-left: 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), transparent 92%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: 72px;
    display: block;
}

.timeline-empty { display: none; }

.timeline-icon {
    position: absolute;
    left: 0;
    top: 4px;
    transform: none;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-3) !important; /* neutralize inline rainbow */
    border: 1px solid var(--accent-line);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: var(--font-size-md);
    z-index: 2;
}

.timeline-content {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateX(6px);
    background: var(--glass-hover);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-md);
}

/* Company / university logo chips */
.logo-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    min-width: 38px;
    max-width: 180px;
    padding: 6px 12px;
    margin-bottom: var(--spacing-sm);
    background: #fff;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.28);
}

.logo-chip img {
    height: 26px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    display: block;
}

.logo-chip--mono {
    background: var(--bg-3);
    border: 1px solid var(--accent-line);
    color: var(--accent);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    box-shadow: none;
}

.experience-header { margin-bottom: var(--spacing-md); }

.experience-title {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-company {
    font-size: var(--font-size-sm);
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.experience-period {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.experience-description {
    margin: var(--spacing-md) 0;
    color: var(--color-text-secondary);
    font-weight: 300;
}

.experience-responsibilities {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.experience-responsibilities li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    position: relative;
    color: var(--color-text-secondary);
}

.experience-responsibilities li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.experience-tech,
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.tech-tag {
    padding: 0.3rem 0.7rem;
    background: transparent;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

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

/* ============================================
   Skills
   ============================================ */
.skills-section { background: var(--bg-2); border-top: 1px solid var(--line); }

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin: 0;
}

.skill-category {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-6px);
    background: var(--glass-hover);
    border-color: var(--accent-line);
    box-shadow: var(--shadow-md);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--line);
}

.skill-category-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-md);
    background: var(--accent-soft) !important;
    color: var(--accent) !important;
}

.skill-category-title {
    font-family: var(--font-display);
    font-size: var(--font-size-md);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    padding: 0.35rem 0.75rem;
    background: var(--bg-3);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #0a0a0b;
    transform: translateY(-2px);
}

/* ============================================
   Projects — Featured Work
   ============================================ */
.projects-head { margin-bottom: var(--spacing-lg); }
.projects-head .section-title { margin-bottom: var(--spacing-md); }

.projects-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6ch;
    padding: 0.5rem 0.95rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--line-strong);
    background: transparent;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.filter-chip:hover { color: var(--color-text-primary); border-color: var(--accent-line); }

.filter-chip.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #0a0a0b;
    font-weight: 700;
}

.filter-count {
    font-size: 0.66rem;
    padding: 0.05rem 0.42rem;
    border-radius: var(--radius-full);
    background: var(--accent-soft);
    color: var(--accent);
}

.filter-chip.active .filter-count { background: rgba(10, 10, 11, 0.22); color: #0a0a0b; }

.projects-empty {
    text-align: center;
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    padding: var(--spacing-xl) 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(264px, 1fr));
    gap: var(--spacing-md);
    align-items: start; /* each card sizes to its own content */
}

.project-card {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 0;
    transition: transform var(--transition-normal), border-color var(--transition-normal),
                box-shadow var(--transition-normal), background var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: auto; /* compact when collapsed; grows on expand */
    position: relative;
    overflow: hidden;
    cursor: pointer;
    outline: none;
}

.project-card:hover {
    transform: translateY(-8px);
    background: var(--glass-hover);
    border-color: var(--line-strong);
    box-shadow: var(--shadow-lg);
}

.project-card:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.project-card.expanded {
    border-color: var(--accent-line);
    box-shadow: var(--shadow-lg);
}

.project-card.is-hidden { display: none; }

/* Entrance animation (initial load + on filter) */
.pc-enter { animation: pcEnter 0.5s cubic-bezier(0.22, 1, 0.36, 1) backwards; }

@keyframes pcEnter {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to { opacity: 1; transform: none; }
}

/* Media — full, uncropped 2:1 artwork */
.pc-media {
    position: relative;
    margin: 0;
    aspect-ratio: 2 / 1;
    background: var(--bg-3);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}

.pc-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform var(--transition-slow);
}

.project-card:hover .pc-img { transform: scale(1.045); }

.pc-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 58%, rgba(10, 10, 11, 0.5) 100%);
    pointer-events: none;
}

.pc-num {
    position: absolute;
    top: 9px;
    right: 12px;
    z-index: 2;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.04em;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.65);
}

.pc-num::before { content: '/ '; color: var(--color-text-muted); }

.pc-tag {
    position: absolute;
    left: 10px;
    bottom: 10px;
    z-index: 2;
    padding: 0.28rem 0.62rem;
    border-radius: var(--radius-full);
    background: rgba(10, 10, 11, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--line-strong);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    color: var(--color-text-secondary);
}

.pc-body {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
}

.pc-titlerow {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.pc-title {
    font-family: var(--font-display);
    font-size: 1.02rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    line-height: 1.22;
    display: flex;
    align-items: baseline;
    gap: 0.6ch;
}

.pc-ico { color: var(--accent); font-size: 0.78em; flex-shrink: 0; }

.project-toggle {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--line-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 0.72rem;
    transition: all var(--transition-normal);
}

.project-card:hover .project-toggle { border-color: var(--accent-line); }

.project-card.expanded .project-toggle {
    background: var(--accent);
    border-color: var(--accent);
    color: #0a0a0b;
    transform: rotate(135deg);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.55;
    font-weight: 300;
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition-fast);
}

.project-card.expanded .project-description {
    -webkit-line-clamp: unset;
    line-clamp: unset;
    overflow: visible;
}

/* Always-visible quick meta (collapsed state) */
.pc-quickmeta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.pc-quickmeta span { display: inline-flex; align-items: center; gap: 0.5ch; }

.pc-quickmeta i { color: var(--accent); }

.project-card.expanded .pc-quickmeta { display: none; }

.pc-detail-inner { overflow: hidden; }

/* Collapsible detail drawer */
.project-details {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    margin-top: 0;
    transition: grid-template-rows var(--transition-normal), opacity var(--transition-normal),
                margin-top var(--transition-normal);
}

.project-details > * { min-height: 0; }

.project-details > :first-child { overflow: hidden; }

.project-card.expanded .project-details {
    grid-template-rows: 1fr;
    opacity: 1;
    margin-top: var(--spacing-md);
}

/* Wrap detail contents so the grid-rows animation has a single child to clip */
.project-details .project-tech,
.project-details .project-links,
.project-details .project-stats { min-width: 0; }

.project-links {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.project-link {
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid var(--line-strong);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    display: inline-flex;
    align-items: center;
    gap: 0.5ch;
    transition: all var(--transition-fast);
}

.project-link:hover {
    background: var(--accent);
    color: #0a0a0b;
    border-color: var(--accent);
}

.project-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--line);
}

.project-stat { text-align: left; }

.project-stat-value {
    display: block;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--accent);
    font-size: var(--font-size-md);
}

.project-stat-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   Education
   ============================================ */
.education-section { background: var(--bg-2); border-top: 1px solid var(--line); }

.subsection-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
    position: relative;
    padding-left: var(--spacing-md);
}

.subsection-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.1em;
    bottom: 0.1em;
    width: 4px;
    background: var(--accent);
    border-radius: var(--radius-full);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.education-card {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.education-card:hover {
    transform: translateY(-6px);
    background: var(--glass-hover);
    border-color: var(--accent-line);
    box-shadow: var(--shadow-md);
}

.education-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    background: var(--accent-soft) !important;
    color: var(--accent) !important;
    border: 1px solid var(--accent-line);
}

.education-degree {
    font-family: var(--font-display);
    font-size: var(--font-size-md);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.education-institution {
    font-size: var(--font-size-sm);
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.education-period {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.education-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.education-achievements { list-style: none; }

.education-achievements li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    position: relative;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.education-achievements li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: var(--spacing-sm);
}

.certification-card {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.certification-card:hover {
    transform: translateY(-4px);
    background: var(--glass-hover);
    border-color: var(--accent-line);
}

.certification-icon {
    font-size: var(--font-size-lg);
    color: var(--accent) !important;
    flex-shrink: 0;
}

.certification-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 2px;
}

.certification-issuer {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.certification-date {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   Contact
   ============================================ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-info-item {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.contact-info-item:hover {
    transform: translateX(6px);
    background: var(--glass-hover);
    border-color: var(--accent-line);
}

.contact-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-md);
    flex-shrink: 0;
    background: var(--accent-soft) !important;
    color: var(--accent) !important;
}

.contact-info-content h4 {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: 2px;
    font-weight: 500;
}

.contact-info-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.contact-form-wrapper {
    background: var(--glass);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5ch;
}

.form-group label i { color: var(--accent); }

.form-group input,
.form-group textarea {
    padding: 0.85rem 1rem;
    background: var(--bg);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--color-text-muted); }

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background: var(--bg-2);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.form-submit {
    padding: 0.95rem 1.6rem;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: #0a0a0b;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6ch;
}

.form-submit:hover {
    transform: translateY(-2px);
    background: #d4ff45;
    box-shadow: 0 10px 30px rgba(197, 248, 42, 0.28);
}

.form-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.form-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-xs);
    display: none;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
}

.form-message.success {
    background: var(--accent-soft);
    border: 1px solid var(--accent-line);
    color: var(--accent);
}

.form-message.error {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: #ff8b8b;
}

.contact-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-darker);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    position: relative;
    border-top: 1px solid var(--line);
}

.footer-content { text-align: center; }

.footer-tagline {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.footer-copyright {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    transition: color var(--transition-fast);
}

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

.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent);
    border: none;
    color: #0a0a0b;
    font-size: var(--font-size-md);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-navbar);
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    background: #d4ff45;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

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

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 968px) {
    :root {
        --font-size-4xl: 3.4rem;
        --font-size-3xl: 2.5rem;
        --font-size-2xl: 2.1rem;
        --spacing-2xl: 5rem;
    }

    .nav-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 78%;
        max-width: 320px;
        height: 100vh;
        background: rgba(10, 10, 11, 0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: 1px solid var(--line);
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        padding: var(--spacing-2xl) var(--spacing-lg);
        transition: right var(--transition-normal);
        gap: var(--spacing-md);
    }

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

    .nav-menu li a { font-size: var(--font-size-sm); }

    .hero-grid { grid-template-columns: 1fr; gap: var(--spacing-xl); }

    .hero-portrait {
        order: -1;
        max-width: 300px;
        margin: 0 0 var(--spacing-sm);
    }

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

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

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

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2.9rem;
        --font-size-3xl: 2.1rem;
        --spacing-xl: 3rem;
        --spacing-2xl: 4rem;
    }

    .container { padding: 0 var(--spacing-md); }

    .section { padding: var(--spacing-2xl) 0; }

    .hero-section {
        min-height: auto;
        padding: calc(var(--spacing-2xl) + 60px) 0 var(--spacing-2xl);
    }

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

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

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

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 2.4rem;
        --font-size-3xl: 1.85rem;
        --font-size-2xl: 1.6rem;
        --spacing-md: 1.1rem;
        --spacing-lg: 1.6rem;
    }

    .hero-cta { flex-direction: column; width: 100%; }

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

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

    .project-stats { grid-template-columns: repeat(3, 1fr); }

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

    .timeline-item { padding-left: 60px; }
}