/* ============================================================
 Ahmad Yousuf Portfolio — main.css
 Themes: Retro-Dark (default) · Ember · Copper
 ============================================================ */
/* ─── RETRO DARK (default) — leather brown + rust orange ─────── */
:root {color-scheme: dark;/* Typography — vintage serif + typewriter */--font-display: 'Playfair Display', Georgia, serif;--font-body: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;--font-mono: 'Special Elite', 'Courier New', monospace;
/* Surfaces — dark leather */--canvas: #100a04;--surface-soft: #170d06;--surface-card: #1e1209;--surface-dark: #080503;--surface-dark-el: #150e07;--surface-dark-soft: #120b05;
/* Brand — rust orange */--primary: #d4661a;--primary-h: #b05514;--primary-dis: #6a3a0d;--accent-teal: #3d7a50;--accent-amber: #c68b10;
/* Text — cream, maximum contrast */--ink: #f5e6c4;--body-strong: #e8d4a8;--body: #c4a870;--muted: #8a7050;--muted-soft: #6a5840;--on-dark: #f5e6c4;--on-dark-soft: #c4a870;--on-primary: #ffffff;
/* Borders */--hairline: #3a2515;--hairline-soft: #4a3020;
/* Nav */--nav-bg: rgba(16, 10, 4, 0.96);
/* Spacing */--sp-xxs: 4px;--sp-xs: 8px;--sp-sm: 12px;--sp-md: 16px;--sp-lg: 24px;--sp-xl: 32px;--sp-xxl: 48px;--sp-sec: 96px;
/* Radius */--r-xs: 4px;--r-sm: 6px;--r-md: 8px;--r-lg: 12px;--r-xl: 16px;--r-pill: 9999px;
/* Shadows */--shadow-sm: 0 1px 3px rgba(20, 20, 19, .08);--shadow-md: 0 4px 16px rgba(20, 20, 19, .10);}
/* ─── EMBER THEME — charcoal + fire orange ───────────────────── */
[data-theme="ember"] {--font-display: 'Roboto', sans-serif;--font-body: 'Roboto', sans-serif;--font-mono: 'Roboto Mono', monospace;
--canvas: #0a0a0a;--surface-soft: #111111;--surface-card: #181818;--surface-dark: #050505;--surface-dark-el: #141414;--surface-dark-soft: #0f0f0f;
--primary: #e85c0a;--primary-h: #c04808;--primary-dis: #5a2808;--accent-teal: #2a8060;--accent-amber: #d4880a;
--ink: #f4ede0;--body-strong: #e0d4c0;--body: #b0a890;--muted: #706858;--muted-soft: #504840;--on-dark: #f4ede0;--on-dark-soft: #b0a890;--on-primary: #ffffff;
--hairline: #282828;--hairline-soft: #323232;--nav-bg: rgba(10, 10, 10, 0.97);
--r-xs: 4px;--r-sm: 6px;--r-md: 8px;--r-lg: 12px;--r-xl: 16px;--r-pill: 9999px;
--shadow-sm: 0 1px 4px rgba(0, 0, 0, .6);--shadow-md: 0 4px 24px rgba(0, 0, 0, .75);}
/* ─── COPPER THEME — forest dark + aged copper ──────────────── */
[data-theme="copper"] {--font-display: 'Cormorant Garamond', Georgia, serif;--font-body: 'Roboto', sans-serif;--font-mono: 'Roboto Mono', monospace;
--canvas: #0a0c0a;--surface-soft: #111511;--surface-card: #181c18;--surface-dark: #060806;--surface-dark-el: #141814;--surface-dark-soft: #101310;
--primary: #b87333;--primary-h: #9a6120;--primary-dis: #4a3015;--accent-teal: #4a9a6a;--accent-amber: #c8a832;
--ink: #e8f0e0;--body-strong: #d0dcc8;--body: #a0b098;--muted: #607058;--muted-soft: #485040;--on-dark: #e8f0e0;--on-dark-soft: #a0b098;--on-primary: #ffffff;
--hairline: #242e24;--hairline-soft: #2e3a2e;--nav-bg: rgba(10, 12, 10, 0.97);
--r-xs: 4px;--r-sm: 6px;--r-md: 8px;--r-lg: 12px;--r-xl: 16px;--r-pill: 9999px;
--shadow-sm: 0 1px 4px rgba(0, 0, 0, .5);--shadow-md: 0 4px 20px rgba(0, 0, 0, .65);}
/* ─── RESET ─────────────────────────────────────────────────── */
*, *::before, *::after {box-sizing: border-box;margin: 0;padding: 0;}
html {scroll-behavior: smooth;-webkit-text-size-adjust: 100%;font-size: 16px;background-color: #100a04;}
body {font-family: var(--font-body);background: var(--canvas);color: var(--body);line-height: 1.55;transition: background .3s ease, color .3s ease;-webkit-font-smoothing: antialiased;}
img {max-width: 100%;display: block;}
a {text-decoration: none;color: inherit;}
button, input, textarea, select {font-family: inherit;font-size: inherit;}
button {cursor: pointer;}
ul {list-style: none;}
/* ─── LAYOUT ────────────────────────────────────────────────── */
.container {width: 100%;padding: 0 clamp(20px, 4.5vw, 88px);}
.section {padding: var(--sp-sec) 0;}
.section-sm {padding: calc(var(--sp-sec) * .6) 0;}
/* ─── TYPOGRAPHY ────────────────────────────────────────────── */
.disp-xl {font-family: var(--font-display);font-size: clamp(38px, 5vw, 64px);font-weight: 400;line-height: 1.05;letter-spacing: -1.5px;}
.disp-lg {font-family: var(--font-display);font-size: clamp(30px, 4vw, 48px);font-weight: 400;line-height: 1.1;letter-spacing: -1px;}
.disp-md {font-family: var(--font-display);font-size: clamp(24px, 3vw, 36px);font-weight: 400;line-height: 1.15;letter-spacing: -.5px;}
.disp-sm {font-family: var(--font-display);font-size: clamp(20px, 2.5vw, 28px);font-weight: 400;line-height: 1.2;letter-spacing: -.3px;}
.t-ink {color: var(--ink);}
.t-muted {color: var(--muted);}
.t-primary {color: var(--primary);}
.t-teal {color: var(--accent-teal);}
.t-amber {color: var(--accent-amber);}
.t-on-dark {color: var(--on-dark);}
/* ─── SECTION HEADINGS ──────────────────────────────────────── */
.sec-head {margin-bottom: var(--sp-xxl);}
.sec-head .eyebrow {display: block;color: var(--primary);margin-bottom: var(--sp-sm);}
.sec-head h2 {color: var(--ink);margin-bottom: var(--sp-md);}
.sec-head p {color: var(--muted);max-width: 580px;font-size: 16px;line-height: 1.65;}
.sec-head.center {text-align: center;}
.sec-head.center p {margin: 0 auto;}
.sec-head.dark .eyebrow {color: var(--accent-teal);}
.sec-head.dark h2 {color: var(--on-dark);}
.sec-head.dark p {color: var(--on-dark-soft);}
.sec-head.dark-amber .eyebrow {color: var(--accent-amber);}
/* ─── BUTTONS ───────────────────────────────────────────────── */
.btn {display: inline-flex;align-items: center;justify-content: center;gap: 8px;padding: 10px 20px;height: 40px;border-radius: var(--r-md);border: 1px solid transparent;font-family: var(--font-body);font-size: 14px;font-weight: 500;line-height: 1;white-space: nowrap;transition: background .18s, border-color .18s, color .18s, opacity .18s;cursor: pointer;text-decoration: none;}
.btn svg {width: 15px;height: 15px;flex-shrink: 0;}
.btn-primary {background: var(--primary);color: #1a0a00;font-weight: 600;}
.btn-primary:hover {background: var(--primary-h);color: #1a0a00;}
.btn-secondary {background: transparent;color: var(--on-dark);border-color: rgba(255,255,255,.25);}
.btn-secondary:hover {border-color: var(--primary);color: var(--primary);}
.btn-ghost {background: rgba(255, 255, 255, .07);color: var(--on-dark);border-color: rgba(255, 255, 255, .12);}
.btn-ghost:hover {border-color: rgba(204, 120, 92, .5);color: var(--on-dark);}
.btn-cream {background: #fff;color: var(--primary);border-color: #fff;}
.btn-cream:hover {opacity: .9;}
.btn-sm {padding: 7px 14px;height: 32px;font-size: 13px;}
.btn-lg {padding: 14px 28px;height: 50px;font-size: 15px;}
/* ─── BADGES ────────────────────────────────────────────────── */
.badge {display: inline-flex;align-items: center;gap: 5px;padding: 3px 10px;border-radius: var(--r-pill);font-size: 12px;font-weight: 500;letter-spacing: .3px;}
.badge-coral {background: rgba(204, 120, 92, .12);color: var(--primary);}
.badge-teal {background: rgba(93, 184, 166, .12);color: var(--accent-teal);}
.badge-amber {background: rgba(232, 165, 90, .12);color: var(--accent-amber);}
.badge-ink {background: rgba(20, 20, 19, .07);color: var(--ink);}
[data-theme="dark"] .badge-ink {background: rgba(250, 249, 245, .08);color: var(--on-dark);}
.tag {display: inline-block;padding: 3px 8px;background: var(--hairline);color: var(--muted);border-radius: var(--r-xs);font-family: var(--font-mono);font-size: 11px;font-weight: 400;letter-spacing: .2px;}
[data-theme="dark"] .tag {background: var(--surface-dark-el);color: var(--on-dark-soft);}
/* ─── NAV ───────────────────────────────────────────────────── */
.nav {position: fixed;top: 0;left: 0;right: 0;z-index: 100;height: 60px;background: var(--nav-bg);backdrop-filter: blur(12px);-webkit-backdrop-filter: blur(12px);border-bottom: 1px solid transparent;transition: border-color .3s, box-shadow .3s;}
.nav.scrolled {border-bottom-color: var(--hairline);box-shadow: var(--shadow-sm);}
.nav .container {height: 100%;display: flex;align-items: center;gap: var(--sp-md);}
.nav-brand {display: flex;align-items: center;gap: 8px;font-family: var(--font-display);font-size: 20px;font-weight: 400;color: var(--ink);letter-spacing: -.3px;flex-shrink: 0;text-decoration: none;}
.nav-spike {width: 16px;height: 16px;flex-shrink: 0;background: var(--primary);clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);}
.nav-links {display: flex;align-items: center;gap: 2px;flex: 1;justify-content: center;}
.nav-links a {display: flex;align-items: center;gap: 4px;padding: 6px 10px;border-radius: var(--r-sm);font-size: 14px;font-weight: 500;color: var(--on-dark-soft);transition: color .2s, background .2s;}
.nav-links a:hover,
.nav-links a.active {color: var(--on-dark);background: rgba(255,255,255,.07);}
/* Nav icon/text structure — desktop shows text, tablet shows icons */
.nav-link-item .nav-icon {display: none;}
.nav-link-item .nav-icon svg {width: 18px;height: 18px;}
.nav-link-item .nav-txt {display: inline;}
.nav-right {display: flex;align-items: center;gap: var(--sp-sm);flex-shrink: 0;}
/* Theme Toggle */
.theme-btn {width: 34px;height: 34px;border-radius: var(--r-pill);background: transparent;border: 1px solid var(--hairline);color: var(--muted);display: flex;align-items: center;justify-content: center;transition: all .2s;flex-shrink: 0;}
.theme-btn:hover {border-color: var(--primary);color: var(--primary);}
.theme-btn svg {width: 15px;height: 15px;}
/* Theme Cycle Button */
.theme-cycle-btn {display: inline-flex;align-items: center;gap: 6px;height: 28px;padding: 0 10px;border-radius: var(--r-pill);border: 1px solid var(--hairline);background: transparent;color: var(--muted);font-family: var(--font-body);font-size: 11px;font-weight: 500;cursor: pointer;text-transform: uppercase;letter-spacing: .8px;transition: all .2s;white-space: nowrap;}
.theme-cycle-btn:hover {border-color: var(--primary);color: var(--primary);}
.theme-cycle-dot {width: 6px;height: 6px;border-radius: 50%;background: var(--primary);flex-shrink: 0;}
/* Hamburger */
.nav-ham {display: none;flex-direction: column;justify-content: center;gap: 5px;width: 34px;height: 34px;background: none;border: none;padding: 5px;}
.nav-ham span {display: block;height: 1.5px;background: var(--ink);transition: transform .3s, opacity .3s;transform-origin: center;}
.nav-ham.open span:nth-child(1) {transform: translateY(6.5px) rotate(45deg);}
.nav-ham.open span:nth-child(2) {opacity: 0;}
.nav-ham.open span:nth-child(3) {transform: translateY(-6.5px) rotate(-45deg);}
/* Mobile Nav Sheet */
.mobile-nav {display: none;position: fixed;inset: 0;z-index: 98;background: var(--canvas);flex-direction: column;padding: 72px var(--sp-lg) var(--sp-xl);gap: 4px;overflow-y: auto;}
.mobile-nav.open {display: flex;}
.mobile-nav a {display: block;padding: 14px var(--sp-sm);font-size: 20px;font-family: var(--font-display);color: var(--ink);border-bottom: 1px solid var(--hairline);transition: color .2s;}
.mobile-nav a:hover {color: var(--primary);}
/* ─── HERO ───────────────────────────────────────────────────── */
.hero {padding-top: calc(60px + var(--sp-sec));padding-bottom: var(--sp-sec);background: var(--canvas);position: relative;overflow: hidden;}
.hero::before {content: '';position: absolute;inset: 0;background: radial-gradient(ellipse 700px 500px at 75% 40%, rgba(212,102,26,.11) 0%, transparent 65%), radial-gradient(ellipse 500px 350px at 15% 75%, rgba(212,102,26,.06) 0%, transparent 65%), radial-gradient(ellipse 300px 200px at 50% 10%, rgba(212,102,26,.04) 0%, transparent 70%);animation: hero-glow 9s ease-in-out infinite alternate;pointer-events: none;z-index: 0;}
.hero .container { position: relative; z-index: 1; }
@keyframes hero-glow {0% { opacity: .5; transform: scale(1) translateX(0); }50% { opacity: 1; transform: scale(1.04) translateX(-10px); }100% { opacity: .65; transform: scale(.97) translateX(8px); }}
.hero .container {display: block;width: 100%;}
.hero-left {display: flex;flex-direction: column;}
.hero-eyebrow {display: flex;align-items: center;gap: var(--sp-sm);margin-bottom: var(--sp-xl);}
.status-dot {width: 8px;height: 8px;border-radius: 50%;background: var(--accent-teal);animation: pulse-dot 2.4s ease-in-out infinite;}
@keyframes pulse-dot {0%, 100% { opacity: 1; transform: scale(1);}
50% { opacity: .5; transform: scale(1.4);}}
.hero-title {color: var(--ink);margin-bottom: var(--sp-lg);}
.hero-title em {font-style: italic;color: var(--primary);}
.hero-sub {font-size: 17px;color: var(--muted);line-height: 1.65;margin-bottom: var(--sp-xl);max-width: 520px;}
.hero-cta {display: flex;align-items: center;gap: var(--sp-md);flex-wrap: wrap;margin-bottom: var(--sp-xl);}
.hero-socials {display: flex;gap: var(--sp-sm);}
.social-btn {width: 36px;height: 36px;border-radius: var(--r-pill);border: 1px solid var(--hairline);background: transparent;color: var(--muted);display: flex;align-items: center;justify-content: center;transition: all .2s;}
.social-btn:hover {border-color: var(--primary);color: var(--primary);}
.social-btn svg {width: 15px;height: 15px;}
/* Hero identity card */
.hero-card {background: var(--surface-dark);border-radius: var(--r-xl);padding: var(--sp-xl);position: relative;overflow: hidden;border: 1px solid rgba(255, 255, 255, .04);}
.hero-card::before {content: '';position: absolute;top: -70px;right: -70px;width: 220px;height: 220px;border-radius: 50%;background: radial-gradient(circle, rgba(204, 120, 92, .12) 0%, transparent 70%);pointer-events: none;}
.card-avatar {width: 68px;height: 68px;border-radius: var(--r-pill);background: linear-gradient(135deg, var(--primary) 0%, #a9583e 100%);display: flex;align-items: center;justify-content: center;font-family: var(--font-display);font-size: 26px;font-weight: 400;color: #fff;margin-bottom: var(--sp-md);flex-shrink: 0;}
.card-avatar-svg {width: 80px;height: 90px;color: var(--primary);margin-bottom: var(--sp-md);flex-shrink: 0;}
.card-avatar-svg svg {width: 100%;height: 100%;}
.card-name {font-family: var(--font-display);font-size: 20px;font-weight: 400;color: var(--on-dark);}
.card-alias {font-family: var(--font-mono);font-size: 12px;color: var(--primary);margin: 3px 0;}
.card-loc {font-size: 13px;color: var(--on-dark-soft);margin-bottom: var(--sp-lg);}
.card-stats {display: grid;grid-template-columns: repeat(3, 1fr);gap: var(--sp-md);padding: var(--sp-md) 0;border-top: 1px solid rgba(255, 255, 255, .07);border-bottom: 1px solid rgba(255, 255, 255, .07);margin-bottom: var(--sp-lg);}
.card-stat-n {font-family: var(--font-display);font-size: 22px;font-weight: 400;color: var(--on-dark);}
.card-stat-l {font-size: 10px;font-weight: 500;letter-spacing: 1px;text-transform: uppercase;color: var(--on-dark-soft);margin-top: 2px;}
.card-chips {display: flex;flex-wrap: wrap;gap: var(--sp-xs);}
.chip {padding: 3px 9px;border-radius: var(--r-pill);background: rgba(255, 255, 255, .06);border: 1px solid rgba(255, 255, 255, .09);font-family: var(--font-mono);font-size: 11px;color: var(--on-dark-soft);}
/* ─── ABOUT ──────────────────────────────────────────────────── */
.about {background: var(--surface-soft);}
.about-prose {max-width: 100%;}
.about-prose p {margin-bottom: var(--sp-md);color: var(--body);line-height: 1.8;font-size: 15px;}
.about-prose strong {color: var(--body-strong);font-weight: 500;}
.about-prose p:last-child {margin-bottom: 0;}
/* ─── JOURNEY TIMELINE (alternating) ───────────────────────────── */
.journey {background: var(--surface-soft);}
.tl-alt {position: relative;padding: 0;}
.tl-alt::before {content: '';position: absolute;left: 50%;top: 0;bottom: 0;width: 2px;background: linear-gradient(to bottom, transparent, var(--primary) 5%, var(--hairline) 90%, transparent);transform: translateX(-50%);}
.tl-alt-item {display: grid;grid-template-columns: 1fr 48px 1fr;gap: 0;margin-bottom: var(--sp-xxl);align-items: flex-start;}
.tl-alt-item:last-child {margin-bottom: 0;}
/* Event card alternates sides */
.tl-alt-item:nth-child(odd) .tl-event {order: 1;text-align: right;}
.tl-alt-item:nth-child(odd) .tl-mid {order: 2;}
.tl-alt-item:nth-child(odd) .tl-gained {order: 3;}
.tl-alt-item:nth-child(even) .tl-event {order: 3;text-align: left;}
.tl-alt-item:nth-child(even) .tl-mid {order: 2;}
.tl-alt-item:nth-child(even) .tl-gained {order: 1;text-align: right;}
.tl-mid {display: flex;flex-direction: column;align-items: center;padding-top: 18px;gap: 0;position: relative;}
.tl-dot {width: 13px;height: 13px;border-radius: 50%;background: var(--primary);border: 3px solid var(--canvas);box-shadow: 0 0 0 2px var(--primary);flex-shrink: 0;z-index: 1;}
[data-theme="retro"] .tl-dot {border-radius: 0;}
.tl-event {padding: 18px 22px;background: var(--surface-card);border: 1px solid var(--hairline);border-radius: var(--r-lg);transition: border-color .2s;min-width: 0;}
.tl-event:hover {border-color: var(--primary);}
[data-theme="retro"] .tl-event {border: 2px solid var(--hairline);box-shadow: 4px 4px 0 rgba(0, 0, 0, .3);}
.tl-event-year {font-family: var(--font-mono);font-size: 11px;color: var(--primary);letter-spacing: 1px;margin-bottom: 5px;}
.tl-event-title {font-size: 15px;font-weight: 500;color: var(--ink);margin-bottom: 3px;}
.tl-event-org {font-family: var(--font-mono);font-size: 11px;color: var(--muted);margin-bottom: 8px;}
.tl-event-desc {font-size: 13px;color: var(--body);line-height: 1.6;}
.tl-event-link {font-size: 11px;color: var(--accent-teal);font-family: var(--font-mono);display: inline-block;margin-top: 6px;}
.tl-event-link:hover {text-decoration: underline;}
.tl-gained {padding: 14px 18px;padding-top: 20px;min-width: 0;}
.tl-gained-label {font-size: 10px;letter-spacing: 1.5px;text-transform: uppercase;color: var(--primary);margin-bottom: 8px;font-family: var(--font-mono);border-bottom: 1px solid var(--hairline);padding-bottom: 5px;display: inline-block;}
.tl-gained-tags {display: flex;flex-wrap: wrap;gap: 5px;margin-top: 8px;}
.tl-alt-item:nth-child(odd) .tl-gained-tags {justify-content: flex-start;}
.tl-alt-item:nth-child(even) .tl-gained-tags {justify-content: flex-end;}
.tl-gained-tag {padding: 3px 9px;border: 1px solid var(--hairline);border-radius: var(--r-xs);font-family: var(--font-mono);font-size: 11px;color: var(--muted);background: var(--surface-soft);white-space: nowrap;}
/* ─── EXPERTISE ──────────────────────────────────────────────── */
.expertise-grid {display: grid;grid-template-columns: repeat(3, 1fr);gap: var(--sp-lg);}
.exp-card {background: var(--surface-card);border-radius: var(--r-lg);padding: var(--sp-xl);border: 1px solid transparent;transition: border-color .2s, transform .25s;}
.exp-card:hover {border-color: var(--hairline);transform: translateY(-3px);}
[data-theme="dark"] .exp-card {border-color: var(--hairline-soft);}
[data-theme="dark"] .exp-card:hover {border-color: var(--primary);}
.exp-icon {width: 40px;height: 40px;border-radius: var(--r-md);display: flex;align-items: center;justify-content: center;margin-bottom: var(--sp-md);}
.exp-icon-coral {background: rgba(204, 120, 92, .12);color: var(--primary);}
.exp-icon-teal {background: rgba(93, 184, 166, .12);color: var(--accent-teal);}
.exp-icon-amber {background: rgba(232, 165, 90, .12);color: var(--accent-amber);}
.exp-icon svg {width: 20px;height: 20px;}
.exp-card h3 {font-size: 16px;font-weight: 500;color: var(--ink);margin-bottom: var(--sp-xs);}
.exp-card p {font-size: 14px;color: var(--muted);line-height: 1.65;margin-bottom: var(--sp-md);}
.exp-tags {display: flex;flex-wrap: wrap;gap: 5px;}
/* ─── PROJECTS (dark band) ───────────────────────────────────── */
.projects {background: var(--surface-dark);}
/* ─── ORG-GROUPED PROJECTS ──────────────────────────────────── */
.org-block {margin-bottom: var(--sp-xxl);}
.org-header {display: flex;flex-wrap: wrap;align-items: flex-start;gap: var(--sp-md) var(--sp-xxl);padding: var(--sp-lg) var(--sp-xl);background: var(--surface-dark-el);border-radius: var(--r-lg);border: 1px solid rgba(255,255,255,.06);margin-bottom: var(--sp-lg);}
.org-header-left {display: flex;align-items: center;gap: var(--sp-md);flex-shrink: 0;}
.org-name {font-family: var(--font-display);font-size: 22px;color: var(--on-dark);text-decoration: none;display: flex;align-items: center;gap: 6px;transition: color .2s;}
.org-name:hover { color: var(--primary); }
.org-name svg { width: 14px; height: 14px; opacity: .5; }
.org-role {font-family: var(--font-mono);font-size: 10px;letter-spacing: 1px;text-transform: uppercase;color: var(--primary);background: rgba(212,102,26,.12);padding: 3px 8px;border-radius: var(--r-pill);white-space: nowrap;}
.org-desc {flex: 1;font-size: 14px;color: var(--on-dark-soft);line-height: 1.6;margin: 0;min-width: 200px;}
.repo-grid {display: grid;grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));gap: var(--sp-md);}
.repo-card {display: flex;flex-direction: column;background: var(--surface-dark-el);border-radius: var(--r-lg);padding: var(--sp-lg);border: 1px solid rgba(255,255,255,.06);text-decoration: none;transition: border-color .2s, transform .2s;cursor: pointer;}
.repo-card:hover {border-color: rgba(212,102,26,.35);transform: translateY(-2px);}
.repo-card-header {display: flex;align-items: center;gap: var(--sp-sm);margin-bottom: var(--sp-sm);}
.repo-card-header svg {width: 15px;height: 15px;color: var(--on-dark-soft);flex-shrink: 0;}
.repo-card-name {font-family: var(--font-mono);font-size: 14px;font-weight: 500;color: var(--on-dark);flex: 1;}
.repo-stars {font-size: 12px;color: var(--accent-amber);font-family: var(--font-mono);white-space: nowrap;}
.repo-card-desc {font-size: 13px;color: var(--on-dark-soft);line-height: 1.6;margin: 0 0 auto;padding-bottom: var(--sp-md);flex: 1;}
.repo-card-footer {display: flex;align-items: center;gap: var(--sp-md);flex-wrap: wrap;margin-top: var(--sp-sm);padding-top: var(--sp-sm);border-top: 1px solid rgba(255,255,255,.06);}
.repo-lang {display: flex;align-items: center;gap: 5px;font-family: var(--font-mono);font-size: 11px;color: var(--on-dark-soft);}
.repo-lang-dot {width: 8px;height: 8px;border-radius: 50%;background: var(--primary);flex-shrink: 0;}
.repo-tags {display: flex;gap: 4px;flex-wrap: wrap;}
/* Alternating showcase layout */
.proj-alt {display: flex;flex-direction: column;gap: calc(var(--sp-xxl) * 1.5);}
.proj-alt-item {display: grid;grid-template-columns: 1fr 1fr;gap: var(--sp-xxl);align-items: center;}
/* Even items flip sides */
.proj-alt-item:nth-child(even) .proj-vis {order: 2;}
.proj-alt-item:nth-child(even) .proj-info {order: 1;}
/* Repo stats panel (visual side) */
.proj-vis {background: var(--surface-dark-el);border-radius: var(--r-lg);border: 1px solid rgba(255, 255, 255, .07);overflow: hidden;}
.proj-vis-header {display: flex;align-items: center;gap: var(--sp-sm);padding: 10px var(--sp-md);border-bottom: 1px solid rgba(255, 255, 255, .06);background: var(--surface-dark-soft);}
.proj-vis-dots {display: flex;gap: 5px;}
.proj-vis-name {font-family: var(--font-mono);font-size: 11px;color: var(--on-dark-soft);margin-left: 4px;}
.proj-vis-body {padding: var(--sp-lg);display: flex;flex-direction: column;gap: var(--sp-md);}
.proj-vis-stat {display: flex;align-items: center;gap: 8px;font-family: var(--font-mono);font-size: 13px;color: var(--on-dark-soft);}
.proj-vis-stat svg {width: 14px;height: 14px;color: var(--primary);flex-shrink: 0;}
/* Language bars */
.proj-lang-bars {display: flex;flex-direction: column;gap: 9px;padding-top: 8px;border-top: 1px solid rgba(255, 255, 255, .05);margin-top: 4px;}
.proj-lang-bar-row {display: flex;flex-direction: column;gap: 3px;}
.proj-lang-label {font-family: var(--font-mono);font-size: 11px;color: var(--on-dark-soft);display: flex;justify-content: space-between;}
.proj-lang-label em {color: var(--muted);font-style: normal;}
.proj-lang-track {height: 5px;background: rgba(255, 255, 255, .07);border-radius: 3px;overflow: hidden;}
.proj-lang-fill {height: 100%;background: var(--primary);border-radius: 3px;opacity: .65;}
.proj-vis-link {display: flex;align-items: center;gap: 6px;padding: var(--sp-sm) var(--sp-md);border-top: 1px solid rgba(255, 255, 255, .06);font-family: var(--font-mono);font-size: 12px;color: var(--accent-teal);transition: background .2s;}
.proj-vis-link:hover {background: rgba(93, 184, 166, .06);}
.proj-vis-link svg {width: 13px;height: 13px;}
/* Info side */
.proj-info {padding: var(--sp-sm) 0;}
.proj-name {font-family: var(--font-display);font-size: 22px;font-weight: 400;color: var(--on-dark);margin-bottom: var(--sp-sm);letter-spacing: -.3px;}
.proj-desc {font-size: 14px;color: var(--on-dark-soft);line-height: 1.7;margin-bottom: var(--sp-md);}
.proj-feature {font-family: var(--font-mono);font-size: 12px;color: var(--primary);padding: 8px 12px;background: rgba(204, 120, 92, .07);border-left: 2px solid var(--primary);border-radius: 0 var(--r-sm) var(--r-sm) 0;margin-bottom: var(--sp-md);line-height: 1.5;}
.proj-tags {display: flex;flex-wrap: wrap;gap: 5px;}
.proj-status {font-size: 10px;font-weight: 500;letter-spacing: 1px;text-transform: uppercase;padding: 2px 8px;border-radius: var(--r-pill);}
.proj-status-active {background: rgba(93, 184, 166, .15);color: var(--accent-teal);}
.proj-status-paused {background: rgba(232, 165, 90, .12);color: var(--accent-amber);}
.proj-status-stable {background: rgba(204, 120, 92, .12);color: var(--primary);}
/* Dots (still used in vis header) */
.dot {width: 10px;height: 10px;border-radius: 50%;flex-shrink: 0;}
.dot-r {background: #ff5f57;}
.dot-y {background: #febc2e;}
.dot-g {background: #28c840;}
/* ─── QUDSLAB (dark band) ─────────────────────────────────────── */
.qudslab {background: var(--surface-dark);}
.qudslab-grid {display: grid;grid-template-columns: 1fr 1fr;gap: var(--sp-xxl);align-items: center;}
.ql-card {background: var(--surface-dark-el);border-radius: var(--r-xl);padding: var(--sp-xl);border: 1px solid rgba(255, 255, 255, .07);}
.ql-name {font-family: var(--font-display);font-size: 30px;font-weight: 400;color: var(--on-dark);margin-bottom: var(--sp-md);letter-spacing: -.5px;}
.ql-name span {color: var(--accent-teal);}
.ql-desc {font-size: 14px;color: var(--on-dark-soft);line-height: 1.7;margin-bottom: var(--sp-lg);}
.ql-btns {display: flex;gap: var(--sp-sm);flex-wrap: wrap;margin-bottom: var(--sp-xl);}
.ql-stats {display: grid;grid-template-columns: repeat(3, 1fr);gap: var(--sp-md);}
.ql-stat-n {font-family: var(--font-display);font-size: 20px;color: var(--on-dark);}
.ql-stat-l {font-size: 11px;color: var(--on-dark-soft);letter-spacing: 1px;text-transform: uppercase;}
.ql-right h2 {font-family: var(--font-display);font-size: 30px;color: var(--on-dark);margin-bottom: var(--sp-md);}
.ql-right p {color: var(--on-dark-soft);line-height: 1.7;margin-bottom: var(--sp-md);}
.ql-focus {display: flex;flex-direction: column;gap: var(--sp-sm);margin-top: var(--sp-lg);}
.ql-focus-item {display: flex;align-items: flex-start;gap: var(--sp-sm);font-size: 14px;color: var(--on-dark-soft);line-height: 1.5;}
.ql-focus-item::before {content: '→';color: var(--accent-teal);flex-shrink: 0;font-family: var(--font-mono);font-size: 13px;margin-top: 1px;}
/* ─── RESEARCH ────────────────────────────────────────────────── */
.research-card {background: var(--surface-card);border-radius: var(--r-lg);padding: var(--sp-xl);border: 1px solid var(--hairline);display: grid;grid-template-columns: 1fr auto;gap: var(--sp-xl);align-items: start;transition: border-color .2s;}
.research-card:hover {border-color: var(--primary);}
[data-theme="dark"] .research-card {background: var(--surface-card);}
.research-meta {display: flex;gap: var(--sp-sm);flex-wrap: wrap;margin-bottom: var(--sp-md);}
.research-title {color: var(--ink);margin-bottom: var(--sp-md);}
.research-abstract {font-size: 14px;color: var(--muted);line-height: 1.75;margin-bottom: var(--sp-md);}
.research-keywords {display: flex;flex-wrap: wrap;gap: 5px;margin-bottom: var(--sp-lg);}
.research-right {display: flex;flex-direction: column;gap: var(--sp-md);align-items: flex-end;min-width: 160px;}
.doi-box {background: var(--surface-dark);border-radius: var(--r-md);padding: var(--sp-sm) var(--sp-lg);font-family: var(--font-mono);font-size: 12px;color: var(--on-dark-soft);white-space: nowrap;text-align: center;display: inline-block;}
.doi-box span {color: var(--accent-teal);display: block;margin-bottom: 2px;font-size: 10px;letter-spacing: 1px;text-transform: uppercase;}
.research-stats {text-align: center;}
.research-stats .n {font-family: var(--font-display);font-size: 28px;color: var(--ink);}
.research-stats .l {font-size: 11px;color: var(--muted);letter-spacing: 1px;text-transform: uppercase;}
/* ─── CERTIFICATES ────────────────────────────────────────────── */
.cert-tabs {display: flex;gap: var(--sp-xs);flex-wrap: wrap;margin-bottom: var(--sp-xxl);}
.cert-tab {padding: 7px 16px;border-radius: var(--r-pill);border: 1px solid var(--hairline);background: transparent;font-size: 13px;font-weight: 500;color: var(--muted);cursor: pointer;transition: all .2s;}
.cert-tab:hover {color: var(--ink);border-color: var(--primary);}
.cert-tab.active {background: var(--primary);color: #1a0a00;border-color: var(--primary);font-weight: 600;}
/* Carousel wrapper */
.cert-carousel-wrapper {position: relative;display: flex;align-items: center;gap: var(--sp-sm);}
.cert-carousel {display: flex;gap: var(--sp-lg);overflow-x: auto;scroll-snap-type: x mandatory;scroll-behavior: smooth;-webkit-overflow-scrolling: touch;flex: 1;padding-bottom: var(--sp-sm);/* hide scrollbar */scrollbar-width: none;-ms-overflow-style: none;}
.cert-carousel::-webkit-scrollbar { display: none; }
.cert-carousel .cert-card {flex: 0 0 clamp(220px, 28vw, 280px);scroll-snap-align: start;}
.cert-carousel-btn {flex-shrink: 0;width: 40px;height: 40px;border-radius: 50%;border: 1px solid rgba(255,255,255,.15);background: var(--surface-dark-el);color: var(--on-dark);display: flex;align-items: center;justify-content: center;cursor: pointer;transition: border-color .2s, background .2s;z-index: 2;}
.cert-carousel-btn:hover {border-color: var(--primary);background: rgba(212,102,26,.12);color: var(--primary);}
.cert-carousel-btn svg { width: 18px; height: 18px; }
.cert-grid {display: grid;grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));gap: var(--sp-lg);}
.cert-card {background: var(--surface-card);border-radius: var(--r-lg);overflow: hidden;border: 1px solid var(--hairline);transition: border-color .2s, transform .25s;}
.cert-card:hover {border-color: var(--primary);transform: translateY(-3px);}
[data-theme="dark"] .cert-card {background: var(--surface-card);}
.cert-img {width: 100%;aspect-ratio: 16/9;object-fit: cover;cursor: zoom-in;background: var(--surface-dark);transition: opacity .2s;}
.cert-img:hover {opacity: .92;}
.cert-body {padding: var(--sp-md);}
.cert-issuer {font-size: 10px;font-weight: 500;letter-spacing: 1.2px;text-transform: uppercase;color: var(--primary);margin-bottom: 4px;}
.cert-name {font-size: 14px;font-weight: 500;color: var(--ink);line-height: 1.4;margin-bottom: 5px;}
.cert-desc {font-size: 12px;color: var(--muted);line-height: 1.55;margin-bottom: var(--sp-sm);}
.cert-year {font-family: var(--font-mono);font-size: 11px;color: var(--muted-soft);}
/* ─── TECH STACK ──────────────────────────────────────────────── */
.stack-section {background: var(--canvas);}
.stack-cats {display: flex;flex-direction: column;gap: var(--sp-xl);}
.stack-cat {display: flex;flex-wrap: wrap;align-items: baseline;gap: var(--sp-sm);}
.stack-cat-label {font-family: var(--font-mono);font-size: 10px;font-weight: 500;letter-spacing: 1.5px;text-transform: uppercase;color: var(--primary);opacity: .8;margin-right: 4px;flex-shrink: 0;padding-top: 3px;}
.stack-pills {display: flex;flex-wrap: wrap;gap: 6px;}
.stack-pill {display: inline-flex;align-items: center;gap: 7px;padding: 5px 12px;border-radius: var(--r-pill);background: var(--surface-card);border: 1px solid var(--hairline);font-family: var(--font-mono);font-size: 12px;color: var(--body-strong);transition: border-color .2s, color .2s;}
.stack-pill:hover {border-color: var(--primary);color: var(--primary);}
.tech-logo {width: 16px;height: 16px;flex-shrink: 0;object-fit: contain;filter: brightness(0) invert(1) opacity(.5);transition: filter .2s;}
.stack-pill:hover .tech-logo {filter: brightness(0) invert(1) opacity(.9);}
.pill-dot {width: 5px;height: 5px;border-radius: 50%;flex-shrink: 0;background: var(--primary);opacity: .5;}
/* ─── CONTACT ─────────────────────────────────────────────────── */
.contact {background: var(--canvas);}
.contact-grid {display: grid;grid-template-columns: 1fr 1.5fr;gap: var(--sp-xxl);align-items: start;}
.contact-info-col {display: flex;flex-direction: column;gap: var(--sp-md);}
.contact-list {display: flex;flex-direction: column;gap: var(--sp-md);}
.contact-row {display: flex;align-items: center;gap: var(--sp-md);padding: var(--sp-md);background: var(--surface-card);border-radius: var(--r-lg);border: 1px solid var(--hairline);transition: border-color .2s;}
.contact-row:hover {border-color: var(--primary);}
[data-theme="dark"] .contact-row {background: var(--surface-card);}
.contact-icon {width: 36px;height: 36px;border-radius: var(--r-md);background: rgba(204, 120, 92, .1);display: flex;align-items: center;justify-content: center;color: var(--primary);flex-shrink: 0;}
.contact-icon svg {width: 15px;height: 15px;}
.contact-row-label {font-size: 10px;font-weight: 500;letter-spacing: 1px;text-transform: uppercase;color: var(--muted);}
.contact-row-val {font-size: 14px;color: var(--ink);font-family: var(--font-mono);}
.contact-row-val a {color: var(--primary);}
.contact-row-val a:hover {text-decoration: underline;}
/* Contact Form */
.contact-form {display: flex;flex-direction: column;gap: var(--sp-md);}
.form-row {display: grid;grid-template-columns: 1fr 1fr;gap: var(--sp-md);}
.form-field {display: flex;flex-direction: column;gap: 6px;}
.form-field label {font-size: 13px;font-weight: 500;color: var(--body-strong);}
.form-field input,
.form-field textarea {padding: 10px var(--sp-md);border-radius: var(--r-md);border: 1px solid var(--hairline);background: var(--surface-card);font-family: var(--font-body);font-size: 14px;color: var(--ink);outline: none;transition: border-color .2s, box-shadow .2s;}
.form-field input:focus,
.form-field textarea:focus {border-color: var(--primary);box-shadow: 0 0 0 3px rgba(204, 120, 92, .1);}
.form-field textarea {resize: vertical;min-height: 130px;}
[data-theme="dark"] .form-field input,
[data-theme="dark"] .form-field textarea {background: var(--surface-card);color: var(--ink);}
.form-msg {padding: var(--sp-md);border-radius: var(--r-md);font-size: 14px;display: none;}
.form-msg.success {background: rgba(93, 184, 166, .1);color: var(--accent-teal);border: 1px solid rgba(93, 184, 166, .2);}
.form-msg.error {background: rgba(198, 69, 69, .1);color: #c64545;border: 1px solid rgba(198, 69, 69, .2);}
/* ─── CTA CORAL BAND ──────────────────────────────────────────── */
.cta-coral {background: var(--primary);padding: var(--sp-xxl) 0;}
.cta-coral .container {text-align: center;}
.cta-coral h2 {font-family: var(--font-display);font-size: clamp(26px, 3vw, 38px);color: #fff;margin-bottom: var(--sp-md);letter-spacing: -.5px;}
.cta-coral p {font-size: 16px;color: rgba(255, 255, 255, .8);margin-bottom: var(--sp-xl);max-width: 520px;margin-left: auto;margin-right: auto;}
/* ─── FOOTER (copyright only) ──────────────────────────────────── */
.footer {background: var(--surface-dark);border-top: 1px solid var(--hairline);padding: var(--sp-lg) 0;}
.footer-copy-only {text-align: center;}
.footer-copy {font-family: var(--font-mono);font-size: 12px;color: var(--muted);}
/* ─── LIGHTBOX ────────────────────────────────────────────────── */
.lightbox {display: none;position: fixed;inset: 0;z-index: 9999;background: rgba(0, 0, 0, .88);backdrop-filter: blur(6px);align-items: center;justify-content: center;padding: var(--sp-lg);}
.lightbox.open {display: flex;}
.lightbox img {max-width: 90vw;max-height: 88vh;border-radius: var(--r-lg);object-fit: contain;}
.lb-close {position: absolute;top: var(--sp-lg);right: var(--sp-lg);width: 40px;height: 40px;border-radius: 50%;background: rgba(255, 255, 255, .12);border: none;color: #fff;font-size: 18px;cursor: pointer;display: flex;align-items: center;justify-content: center;transition: background .2s;}
.lb-close:hover {background: rgba(255, 255, 255, .2);}
/* ─── REVEAL ANIMATION ────────────────────────────────────────── */
.reveal {opacity: 0;transform: translateY(20px);transition: opacity .55s ease, transform .55s ease;}
.reveal.visible {opacity: 1;transform: none;}
.rd1 {transition-delay: .08s;}
.rd2 {transition-delay: .16s;}
.rd3 {transition-delay: .24s;}
.rd4 {transition-delay: .32s;}
/* ─── SCROLLBAR ───────────────────────────────────────────────── */
::-webkit-scrollbar {width: 5px;}
::-webkit-scrollbar-track {background: var(--canvas);}
::-webkit-scrollbar-thumb {background: var(--hairline);border-radius: 3px;}
::-webkit-scrollbar-thumb:hover {background: var(--muted-soft);}
/* ─── UTILITIES ───────────────────────────────────────────────── */
.sr-only {position: absolute;width: 1px;height: 1px;padding: 0;margin: -1px;overflow: hidden;clip: rect(0, 0, 0, 0);white-space: nowrap;border: 0;}
.d-flex {display: flex;}
.d-grid {display: grid;}
.gap-sm {gap: var(--sp-sm);}
.gap-md {gap: var(--sp-md);}
/* ─── BOTTOM NAV (mobile) ─────────────────────────────────────── */
.bottom-nav {display: none;position: fixed;bottom: 0;left: 0;right: 0;z-index: 99;background: var(--nav-bg);backdrop-filter: blur(12px);-webkit-backdrop-filter: blur(12px);border-top: 1px solid var(--hairline);height: 56px;padding: 0 4px;justify-content: space-around;align-items: stretch;}
.bn-item {display: flex;flex-direction: column;align-items: center;justify-content: center;gap: 3px;flex: 1;padding: 4px 2px;color: var(--muted);font-size: 9px;letter-spacing: .5px;text-transform: uppercase;font-family: var(--font-mono);transition: color .2s;text-decoration: none;border-top: 2px solid transparent;transition: color .2s, border-color .2s;}
.bn-item svg {width: 20px;height: 20px;flex-shrink: 0;}
.bn-item:hover, .bn-item.active {color: var(--primary);border-top-color: var(--primary);}
[data-theme="retro"] .bn-item.active {border-top-color: var(--primary);}
/* ══════════════════════════════════════════════════════════════
 RETRO THEME — VISUAL OVERRIDES
 ══════════════════════════════════════════════════════════════ */
/* Subtle dark grain texture */
[data-theme="retro"] body {background-image: radial-gradient(ellipse at 20% 50%, rgba(212, 102, 26, .04) 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, rgba(212, 102, 26, .03) 0%, transparent 50%);}
/* Nav */
[data-theme="retro"] .nav.scrolled {border-bottom: 2px solid var(--hairline);box-shadow: 0 2px 8px rgba(0, 0, 0, .5);}
[data-theme="retro"] .nav-brand {font-size: 20px;letter-spacing: 3px;text-transform: uppercase;}
[data-theme="retro"] .nav-links a:hover,
[data-theme="retro"] .nav-links a.active {background: rgba(212, 102, 26, .15);color: var(--primary);}
[data-theme="retro"] .theme-cycle-btn {border: 2px solid var(--hairline);box-shadow: 2px 2px 0 rgba(0, 0, 0, .3);font-family: var(--font-mono);}
/* Buttons — letterpress / hot-metal press effect */
[data-theme="retro"] .btn-primary {box-shadow: 3px 3px 0 var(--primary-h);border: 1px solid var(--primary-h);text-transform: uppercase;letter-spacing: 1.5px;font-family: var(--font-mono);font-size: 12px;border-radius: 2px;}
[data-theme="retro"] .btn-primary:hover {background: var(--primary-h);transform: translate(1px, 1px);box-shadow: 2px 2px 0 var(--primary-h);}
[data-theme="retro"] .btn-secondary {box-shadow: 3px 3px 0 var(--hairline);border: 1px solid var(--hairline);text-transform: uppercase;letter-spacing: 1.5px;font-family: var(--font-mono);font-size: 12px;border-radius: 2px;}
[data-theme="retro"] .btn-secondary:hover {box-shadow: 2px 2px 0 var(--primary);border-color: var(--primary);transform: translate(1px, 1px);}
[data-theme="retro"] .btn-ghost {box-shadow: 2px 2px 0 rgba(255, 255, 255, .12);text-transform: uppercase;letter-spacing: 1.5px;font-family: var(--font-mono);font-size: 12px;border-radius: 2px;}
[data-theme="retro"] .btn-ghost:hover {transform: translate(1px, 1px);box-shadow: 1px 1px 0 rgba(255, 255, 255, .1);}
[data-theme="retro"] .btn-cream {box-shadow: 3px 3px 0 rgba(160, 72, 16, .3);border-radius: 2px;text-transform: uppercase;letter-spacing: 1px;font-family: var(--font-mono);font-size: 12px;}
/* Badges — newspaper tag style */
[data-theme="retro"] .badge {border: 1px solid currentColor;text-transform: uppercase;letter-spacing: 1px;font-size: 10px;background: rgba(212, 102, 26, .08);}
/* Tags */
[data-theme="retro"] .tag {border: 1px solid var(--hairline);background: transparent;color: var(--muted);}
/* Cards — thick borders + offset shadow */
[data-theme="retro"] .exp-card {border: 2px solid var(--hairline);box-shadow: 4px 4px 0 rgba(0, 0, 0, .4);}
[data-theme="retro"] .exp-card:hover {border-color: var(--primary);box-shadow: 4px 4px 0 rgba(212, 102, 26, .25);transform: translate(-2px, -2px);}
[data-theme="retro"] .cert-card {border: 2px solid var(--hairline);box-shadow: 3px 3px 0 rgba(0, 0, 0, .4);}
[data-theme="retro"] .cert-card:hover {border-color: var(--primary);box-shadow: 3px 3px 0 rgba(212, 102, 26, .25);transform: translate(-2px, -2px);}
[data-theme="retro"] .research-card {border: 2px solid var(--hairline);box-shadow: 4px 4px 0 rgba(0, 0, 0, .4);}
[data-theme="retro"] .research-card:hover {border-color: var(--primary);box-shadow: 4px 4px 0 rgba(212, 102, 26, .3);}
[data-theme="retro"] .proj-vis {border: 2px solid var(--hairline);box-shadow: 4px 4px 0 rgba(0, 0, 0, .3);}
[data-theme="retro"] .proj-vis:hover {border-color: var(--primary);}
[data-theme="retro"] .contact-row {border: 2px solid var(--hairline);box-shadow: 2px 2px 0 rgba(0, 0, 0, .3);}
/* Cert tabs — old newspaper tag style */
[data-theme="retro"] .cert-tab {border: 2px solid var(--hairline);text-transform: uppercase;letter-spacing: 1px;font-size: 11px;font-family: var(--font-mono);}
[data-theme="retro"] .cert-tab.active {box-shadow: 2px 2px 0 var(--primary-h);}
[data-theme="retro"] .cert-tab:hover:not(.active) {box-shadow: 2px 2px 0 rgba(140, 88, 28, .2);}
/* Timeline — dashed vintage line, square dot */
[data-theme="retro"] .tl-line {background: transparent;border-left: 2px dashed var(--hairline);width: 0;}
[data-theme="retro"] .tl-line::before {background: var(--primary);border-radius: 0;width: 8px;height: 8px;left: -5px;transform: none;box-shadow: 0 0 0 2px var(--surface-soft);}
/* Status dot — static square stamp feel */
[data-theme="retro"] .status-dot {border-radius: 0;animation: none;}
/* Form inputs */
[data-theme="retro"] .form-field input,
[data-theme="retro"] .form-field textarea {border: 2px solid var(--hairline);border-radius: 2px;background: rgba(255, 255, 255, .25);}
[data-theme="retro"] .form-field input:focus,
[data-theme="retro"] .form-field textarea:focus {border-color: var(--primary);box-shadow: 3px 3px 0 rgba(200, 92, 20, .12);}
/* Stack pills */
[data-theme="retro"] .stack-pill {border: 2px solid var(--hairline);box-shadow: 2px 2px 0 rgba(140, 88, 28, .08);}
[data-theme="retro"] .stack-pill:hover {border-color: var(--primary);box-shadow: 2px 2px 0 rgba(200, 92, 20, .15);}
/* Section top dividers */
[data-theme="retro"] .section {border-top: 1px solid var(--hairline-soft);}
/* Hero card — give lined paper feel */
[data-theme="retro"] .hero-card {border: 2px solid rgba(200, 168, 112, .35);box-shadow: 6px 6px 0 rgba(140, 88, 28, .12);}
/* ─── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 1024px) {.hero .container { grid-template-columns: 1fr;}
.hero-card { display: none;}
.expertise-grid { grid-template-columns: repeat(2, 1fr);}
.proj-alt-item { grid-template-columns: 1fr;}
.proj-alt-item:nth-child(even) .proj-vis { order: 0;}
.proj-alt-item:nth-child(even) .proj-info { order: 0;}
.qudslab-grid { grid-template-columns: 1fr;}
.contact-grid { grid-template-columns: 1fr;}
/* Org/repo cards responsive */.org-header { flex-direction: column; gap: var(--sp-sm);}.repo-grid { grid-template-columns: 1fr 1fr;}.cert-carousel .cert-card { flex: 0 0 clamp(200px, 70vw, 260px);}.cert-carousel-btn { display: none; }
.research-card { grid-template-columns: 1fr;}
.research-right { align-items: flex-start; flex-direction: row; flex-wrap: wrap;}
.tl-alt-item { grid-template-columns: 1fr 36px 1fr;}}
/* Tablet (481px – 900px): icon-only nav */
@media (max-width: 900px) {.nav-link-item .nav-icon { display: flex; align-items: center; justify-content: center;}
.nav-link-item .nav-txt { display: none;}
.nav-links a { padding: 6px 8px;}}
@media (max-width: 768px) {:root { --sp-sec: 64px;}
.nav-right .btn { display: none;}
.expertise-grid { grid-template-columns: 1fr;}
.form-row { grid-template-columns: 1fr;}
.cert-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));}
/* Timeline collapse: single column, hide gained side */.tl-alt-item { grid-template-columns: 28px 1fr;}
.tl-alt-item:nth-child(odd) .tl-gained,.tl-alt-item:nth-child(even) .tl-gained { display: none;}
.tl-alt-item:nth-child(odd) .tl-event { order: 2; text-align: left;}
.tl-alt-item:nth-child(even) .tl-event { order: 2; text-align: left;}
.tl-alt-item:nth-child(odd) .tl-mid { order: 1;}
.tl-alt-item:nth-child(even) .tl-mid { order: 1;}
.tl-alt::before { left: 14px; transform: none;}}
/* Mobile (<481px): bottom nav replaces hamburger */
@media (max-width: 480px) {:root { --sp-sec: 48px;}
.nav-links { display: none;}
.nav-ham { display: none;}
.theme-cycle-btn { display: none;}
.nav { height: 48px;}
.bottom-nav { display: flex;}
body { padding-bottom: 60px;}
.hero-cta { flex-direction: column; align-items: flex-start;}
.hero-sub { font-size: 15px;}
.disp-xl { font-size: 32px;}
.tl-alt::before { display: none;}}