/* ============================================================
   SIMRIN RAJANI PORTFOLIO — DESIGN SYSTEM
   Fonts: Instrument Serif (display) · Inter (sans)
   Themes: warm off-white (light) · deep warm dark (dark)
   Toggle: [data-theme="dark"] on <html>
   ============================================================ */

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

/* ── TOKENS ────────────────────────────────────────────────── */
:root {
  --bg:       #F9F8F5;
  --fg:       #1A1612;
  --muted:    #7A746E;
  --border:   #E4DDD5;
  --card:     #F2EFE9;
  --pill:     #EAE5DE;
  --pill-fg:  #3A342E;

  --serif:    'Inter', system-ui, sans-serif;
  --sans:     'Inter', system-ui, sans-serif;

  --nav-h:    64px;
  --max-w:    1200px;
  --ease:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --theme-t:  background-color 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
}

[data-theme="dark"] {
  --bg:      #141210;
  --fg:      #F5F2EE;
  --muted:   #8A8480;
  --border:  #2A2520;
  --card:    #1C1A17;
  --pill:    #242018;
  --pill-fg: #C8C2BA;
}

/* ── RESET + BASE ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: var(--theme-t);
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── CUSTOM CURSOR ─────────────────────────────────────────── */
.cursor-dot {
  position: fixed;
  width: 8px; height: 8px;
  background: var(--fg);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width .2s, height .2s, opacity .2s;
}
.cursor-dot.xl { width: 36px; height: 36px; opacity: .15; }

/* ── REVEAL ANIMATION ──────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .1s; }
.d2 { transition-delay: .2s; }
.d3 { transition-delay: .3s; }
.d4 { transition-delay: .4s; }

/* ── NAV ───────────────────────────────────────────────────── */
#nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: var(--theme-t), border-color .3s;
}
#nav.scrolled { border-bottom-color: var(--border); }

.nav-left { display: flex; align-items: center; gap: 10px; }
.nav-logo-img { height: 30px; width: auto; object-fit: contain; transition: filter .3s; }
/* In dark mode, invert the black logo to white */
[data-theme="dark"] .nav-logo-img { filter: invert(1) brightness(0.92); }
.nav-logo-name {
  font-size: 13px; font-weight: 500;
  letter-spacing: .03em; color: var(--fg);
}

.nav-right { display: flex; align-items: center; gap: 6px; }
.nav-links { display: flex; align-items: center; }
.nav-links a {
  font-size: 12px; font-weight: 500;
  letter-spacing: .07em; text-transform: uppercase;
  color: var(--muted); padding: 6px 14px; border-radius: 4px;
  transition: color .2s, background .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--fg); }

.nav-contact-btn {
  font-size: 12px; font-weight: 500;
  letter-spacing: .07em; text-transform: uppercase;
  color: var(--bg); background: var(--fg);
  padding: 8px 20px; border-radius: 100px;
  transition: opacity .2s, var(--theme-t);
  margin-left: 8px;
}
.nav-contact-btn:hover { opacity: .78; }

.nav-theme-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; color: var(--muted);
  transition: color .2s, background .2s;
  margin-left: 4px; flex-shrink: 0;
}
.nav-theme-btn:hover { color: var(--fg); background: var(--card); }
.nav-theme-btn svg { width: 15px; height: 15px; }

/* icon visibility */
.icon-moon { display: block; }
.icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun  { display: block; }

.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 4px; margin-left: 6px;
}
.nav-hamburger span {
  display: block; width: 22px; height: 1.5px;
  background: var(--fg); border-radius: 2px;
}

.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 99;
  background: var(--bg);
  flex-direction: column; align-items: flex-start;
  justify-content: center; padding: 60px 40px; gap: 4px;
  transition: var(--theme-t);
}
.mobile-nav.open { display: flex; }
.mobile-close-btn {
  position: absolute; top: 20px; right: 36px;
  font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.mob-main {
  font-family: var(--sans);
  font-size: clamp(36px, 8vw, 56px);
  color: var(--fg); line-height: 1.2; padding: 4px 0;
}
.mob-contact {
  font-family: var(--sans);
  font-size: clamp(28px, 6vw, 44px);
  color: var(--muted); padding: 4px 0; margin-top: 8px;
}

/* ── HERO ──────────────────────────────────────────────────── */
#hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; background: var(--bg);
  transition: var(--theme-t);
}

.hero-trail-layer {
  position: absolute; inset: 0;
  pointer-events: none; z-index: 0; overflow: hidden;
}

.trail-img {
  position: absolute; width: 220px; height: auto;
  object-fit: contain; border-radius: 0;
  opacity: 0; pointer-events: none;
  will-change: transform, opacity;
  transition: opacity .1s ease;
}
.trail-img.visible { opacity: 1; }
.trail-img.fading  { opacity: 0; transition: opacity .65s ease; }

.hero-content {
  position: relative; z-index: 1;
  text-align: center; padding: 0 24px;
  will-change: transform, opacity, filter;
}

.hero-name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(56px, 11vw, 148px);
  letter-spacing: -0.03em; line-height: 1;
  color: var(--fg); margin-bottom: 24px;
  pointer-events: none;
}

.hero-sub {
  font-size: clamp(13px, 1.6vw, 17px);
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--muted); font-weight: 400;
  display: flex; align-items: center; justify-content: center;
  gap: 12px; flex-wrap: wrap;
}
.hero-sub .star { opacity: .35; }

.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  z-index: 1; opacity: .4; pointer-events: none;
}
.hero-scroll-hint span { font-size: 9px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.scroll-line { width: 1px; height: 36px; background: var(--muted); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100%{opacity:.3} 50%{opacity:1} }

/* ── SECTION SHARED ────────────────────────────────────────── */
.section-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }

.section-label {
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; margin-bottom: 12px;
}

.section-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(32px, 5vw, 60px);
  letter-spacing: -0.02em; line-height: 1.05; color: var(--fg);
}

/* ── FEATURED WORK ─────────────────────────────────────────── */
#featured {
  padding: 112px 0 96px;
  border-top: 1px solid var(--border);
}

.featured-sub {
  font-family: var(--sans);
  font-size: clamp(16px, 2vw, 22px);
  color: var(--muted); margin: 14px 0 52px;
}

.work-duo {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 20px; margin-bottom: 48px;
}

.work-thumb {
  display: block; position: relative;
  overflow: hidden; border-radius: 10px;
  aspect-ratio: 1 / 1; background: var(--card);
}
.work-thumb img, .work-thumb video {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s var(--ease);
}
.work-thumb:hover img, .work-thumb:hover video { transform: scale(1.04); }
.work-thumb-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.36);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 8px;
  opacity: 0; transition: opacity .35s;
}
.work-thumb:hover .work-thumb-overlay { opacity: 1; }
.work-thumb-name {
  font-family: var(--sans);
  font-size: clamp(18px, 2.5vw, 28px); color: #fff;
}
.work-thumb-type {
  font-size: 10px; letter-spacing: .16em; text-transform: uppercase;
  color: rgba(255,255,255,.7);
}

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
  color: var(--fg); border: 1px solid var(--border);
  padding: 12px 28px; border-radius: 100px;
  transition: background .25s, border-color .25s, color .25s;
}
.btn-outline:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }

/* ── ABOUT ─────────────────────────────────────────────────── */
#about { padding: 112px 0 96px; border-top: 1px solid var(--border); }

.about-photos {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-bottom: 72px;
}
.about-photo {
  aspect-ratio: 3 / 4; overflow: hidden;
  border-radius: 8px; background: var(--card);
}
.about-photo img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s var(--ease);
}
.about-photo:hover img { transform: scale(1.03); }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.about-cell { padding: 40px 0; border-top: 1px solid var(--border); }
.about-cell:nth-child(odd) { padding-right: 52px; }
.about-cell:nth-child(even) { padding-left: 52px; border-left: 1px solid var(--border); }
.about-cell-label {
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; margin-bottom: 16px;
}
.about-cell p { font-size: 14px; line-height: 1.85; color: var(--fg); }

.skills-wrap { padding: 56px 0 0; border-top: 1px solid var(--border); margin-top: 8px; }
.skills-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.pill {
  font-size: 12px; color: var(--pill-fg); background: var(--pill);
  padding: 7px 16px; border-radius: 100px;
  border: 1px solid var(--border);
}

/* ── FOOTER ────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px 60px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px;
  position: relative; overflow: hidden;
}

/* Strider runner */
.footer-strider-wrap {
  position: absolute;
  bottom: 14px; left: 40px;
  opacity: 0; pointer-events: none;
  transform-origin: center bottom;
  transition: left 0.07s linear, opacity 0.2s;
  will-change: left, transform;
}
.footer-strider-wrap.visible { opacity: 0.75; }

.footer-strider {
  width: 44px; height: auto; display: block;
}
[data-theme="dark"] .footer-strider {
  filter: invert(1) brightness(0.92);
}

@keyframes strider-bounce {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25%       { transform: translateY(-7px) rotate(-3deg); }
  75%       { transform: translateY(-4px) rotate(2deg); }
}
.footer-strider-wrap.running .footer-strider {
  animation: strider-bounce 0.34s ease-in-out infinite;
}
.footer-left-wrap { display: flex; flex-direction: column; gap: 6px; }
.footer-left {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(18px, 2vw, 24px); color: var(--fg);
}
.footer-email { font-size: 12px; color: var(--muted); }
.footer-links { display: flex; align-items: center; gap: 20px; }
.footer-link {
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--fg); opacity: 1; transition: opacity .2s, transform .2s;
}
.footer-link:hover { opacity: .6; transform: translateY(-2px); }
.footer-link svg { width: 26px; height: 26px; display: block; }
.footer-copy { width: 100%; font-size: 11px; color: var(--muted); opacity: .55; }

/* ── WORK PAGE ─────────────────────────────────────────────── */
.page-header {
  padding: calc(var(--nav-h) + 60px) 40px 52px;
  border-bottom: 1px solid var(--border);
  max-width: var(--max-w); margin: 0 auto;
}
.page-header h1 {
  font-family: var(--sans);
  font-size: clamp(40px, 7vw, 88px);
  letter-spacing: -0.02em; line-height: 1; color: var(--fg);
}

.work-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  max-width: var(--max-w); margin: 0 auto;
  padding: 48px 40px 100px; gap: 20px;
}
.work-card {
  display: block; overflow: hidden;
  border-radius: 10px; background: var(--card); position: relative;
}
.work-card-img { aspect-ratio: 4/3; overflow: hidden; }
.work-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s var(--ease);
}
.work-card:hover .work-card-img img { transform: scale(1.04); }
.work-card-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.38);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 6px;
  opacity: 0; transition: opacity .3s;
}
.work-card:hover .work-card-overlay { opacity: 1; }
.work-card-name {
  font-family: var(--sans); font-size: 20px; color: #fff;
}
.work-card-type { font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.65); }
.work-card-info { padding: 14px 0 4px; text-align: center; }
.work-card-info-name { font-size: 14px; font-weight: 500; color: var(--fg); margin-bottom: 2px; }
.work-card-info-type { font-size: 12px; color: var(--muted); }

/* ── ART GALLERY ───────────────────────────────────────────── */
.gallery-grid {
  columns: 3; column-gap: 16px;
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 40px 100px;
}
.gallery-item {
  break-inside: avoid; margin-bottom: 16px;
  overflow: hidden; border-radius: 8px; background: var(--card);
}
.gallery-item img { width: 100%; display: block; transition: transform .6s var(--ease); }
.gallery-item:hover img { transform: scale(1.03); }

/* ── CASE STUDY ────────────────────────────────────────────── */
.cs-page { padding-top: var(--nav-h); }

.cs-hero-mockup {
  width: 100%; max-height: 68vh; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.cs-hero-mockup img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }

.cs-title-block {
  max-width: var(--max-w); margin: 0 auto;
  padding: 64px 40px 56px; border-bottom: 1px solid var(--border);
}
.cs-project-name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(36px, 6vw, 80px);
  letter-spacing: -0.03em; line-height: 1; color: var(--fg); margin-bottom: 14px;
}
.cs-project-tagline {
  font-family: var(--sans);
  font-weight: 400;
  font-size: clamp(15px, 1.6vw, 20px); color: var(--muted); margin-bottom: 20px;
}
.cs-project-summary {
  font-size: 15px; line-height: 1.8; color: var(--fg); max-width: 680px;
}

.cs-facts {
  max-width: var(--max-w); margin: 0 auto;
  padding: 48px 40px;
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 32px; border-bottom: 1px solid var(--border);
}
.cs-fact { display: flex; flex-direction: column; gap: 6px; }
.cs-fact-label {
  font-size: 9px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
}
.cs-fact-val { font-size: 13px; color: var(--fg); line-height: 1.5; }

.cs-section {
  max-width: var(--max-w); margin: 0 auto;
  padding: 72px 40px; border-bottom: 1px solid var(--border);
}
.cs-section-num {
  font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; margin-bottom: 8px;
}
.cs-section-heading {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(24px, 3.5vw, 42px);
  letter-spacing: -0.02em; color: var(--fg); margin-bottom: 32px; line-height: 1.1;
}
.cs-body-text { font-size: 15px; line-height: 1.85; color: var(--fg); max-width: 680px; }
.cs-body-text p { margin-bottom: 16px; }
.cs-body-text p:last-child { margin-bottom: 0; }

.cs-insights { display: flex; flex-direction: column; margin-top: 32px; border-top: 1px solid var(--border); }
.cs-insight {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 18px 0; border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--fg);
}
.cs-insight-num {
  font-family: var(--sans);
  font-size: 20px; color: var(--muted); min-width: 28px;
}

.cs-goals {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 12px; margin-top: 32px;
}
.cs-goal-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 24px 28px;
  display: flex; align-items: flex-start; gap: 12px;
}
.cs-goal-check { font-size: 16px; color: var(--fg); flex-shrink: 0; margin-top: 1px; }
.cs-goal-text { font-size: 14px; font-weight: 500; color: var(--fg); line-height: 1.5; }

.cs-full-img {
  width: 100%; overflow: hidden;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.cs-full-img img { width: 100%; display: block; }

.cs-two-col {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: start; margin-top: 32px;
}

.cs-visual-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.cs-visual-item {
  flex: 1; min-width: 150px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 20px;
}
.cs-visual-item-label {
  font-size: 9px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 10px;
}

.cs-challenges { display: flex; flex-direction: column; gap: 32px; margin-top: 32px; }
.cs-challenge-title {
  font-family: var(--sans);
  font-size: 18px; color: var(--fg); margin-bottom: 10px;
}
.cs-challenge-text { font-size: 14px; line-height: 1.8; color: var(--muted); }

.cs-reflection-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-top: 32px;
}
.cs-reflection-card {
  padding: 28px; background: var(--card);
  border: 1px solid var(--border); border-radius: 10px;
}
.cs-reflection-label {
  font-size: 10px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 14px;
}
.cs-reflection-text { font-size: 14px; line-height: 1.8; color: var(--fg); }

.cs-more {
  max-width: var(--max-w); margin: 0 auto;
  padding: 72px 40px; border-top: 1px solid var(--border);
}
.cs-more-header {
  display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 36px;
}
.cs-more-label {
  font-family: var(--sans); font-size: 28px; color: var(--fg);
}
.cs-more-link {
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); border-bottom: 1px solid var(--border); padding-bottom: 2px;
  transition: color .2s, border-color .2s;
}
.cs-more-link:hover { color: var(--fg); border-color: var(--fg); }
.cs-more-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cs-more-card {
  display: block; overflow: hidden;
  border-radius: 10px; background: var(--card); position: relative;
}
.cs-more-card-img { aspect-ratio: 4/3; overflow: hidden; }
.cs-more-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.cs-more-card:hover .cs-more-card-img img { transform: scale(1.04); }
.cs-more-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.35);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .3s;
}
.cs-more-card:hover .cs-more-overlay { opacity: 1; }
.cs-more-overlay-name {
  font-family: var(--sans); font-size: 18px; color: #fff;
}
.cs-more-card-title { padding: 12px 0 4px; font-size: 13px; font-weight: 500; color: var(--fg); }

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media (max-width: 900px) {
  #nav { padding: 0 24px; }
  .nav-links, .nav-contact-btn { display: none; }
  .nav-hamburger { display: flex; }
  .section-inner { padding: 0 24px; }
  .page-header { padding: calc(var(--nav-h) + 40px) 24px 40px; }
  #featured, #about { padding: 80px 0 60px; }
  .work-duo { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-cell:nth-child(odd) { padding-right: 0; }
  .about-cell:nth-child(even) { padding-left: 0; border-left: none; }
  footer { padding: 40px 24px; }
  .work-grid { grid-template-columns: 1fr 1fr; padding: 40px 24px 60px; }
  .gallery-grid { columns: 2; padding: 0 24px 60px; }
  .cs-facts { grid-template-columns: repeat(3, 1fr); padding: 36px 24px; }
  .cs-section, .cs-title-block, .cs-more { padding-left: 24px; padding-right: 24px; }
  .cs-goals { grid-template-columns: 1fr; }
  .cs-two-col { grid-template-columns: 1fr; }
  .cs-reflection-grid { grid-template-columns: 1fr; }
  .cs-more-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .about-photos { grid-template-columns: 1fr 1fr; }
  .about-photos .about-photo:last-child { display: none; }
  .work-grid { grid-template-columns: 1fr; }
  .gallery-grid { columns: 1; }
  .cs-facts { grid-template-columns: repeat(2, 1fr); }
  .cs-more-grid { grid-template-columns: 1fr; }
}
