/* ============================================================
   Eric Ni Portfolio — styles.css
   Faithful Squarespace migration + modern enhancements
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f8f7f4;
  --fg: #111111;
  --fg-muted: #555555;
  --fg-subtle: #888888;
  --accent: #111111;
  --border: #e0ded9;
  --card-bg: #ffffff;
  --nav-bg: rgba(248, 247, 244, 0.88);
  --max-w: 1500px;
  --gutter: 4vw;
  --font: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 0px;
  --transition: 0.22s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── TYPOGRAPHY ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

p { max-width: 72ch; }

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

/* ── LAYOUT ────────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ── HEADER / NAV ──────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: 56px;
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  transition: opacity var(--transition);
}
.site-logo:hover { opacity: 0.6; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--fg-muted);
  transition: color var(--transition);
}
.site-nav a:hover { color: var(--fg); }

.site-nav .icon-link {
  display: flex;
  align-items: center;
  opacity: 0.65;
  transition: opacity var(--transition);
}
.site-nav .icon-link:hover { opacity: 1; }
.site-nav .icon-link svg { width: 18px; height: 18px; }

/* ── HERO / MARQUEE ────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: 56px; /* nav height */
  background: var(--bg);
}

/* WebGL shader canvas sits behind everything */
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.35;
  pointer-events: none;
}

.marquee-block {
  position: relative;
  z-index: 1;
  padding: 4vw 0 3vw;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 18s linear infinite;
}

.marquee-item {
  font-size: clamp(3.5rem, 8vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-right: 5vw;
  color: var(--fg);
  user-select: none;
}

/* Alternating accent color */
.marquee-item:nth-child(4n+2) { color: var(--fg-subtle); }
.marquee-item:nth-child(4n+3) { -webkit-text-stroke: 1.5px var(--fg); color: transparent; }

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ── INTRO SECTION ─────────────────────────────────────────── */
.intro-section {
  padding: 5vw var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

.intro-tagline {
  font-size: clamp(1.1rem, 2.2vw, 1.55rem);
  font-weight: 400;
  line-height: 1.5;
  max-width: 56ch;
  color: var(--fg);
}
.intro-tagline strong { font-weight: 700; }
.intro-tagline em {
  font-style: normal;
  border-bottom: 2px solid var(--fg);
  padding-bottom: 1px;
}

/* ── PROJECTS GRID ─────────────────────────────────────────── */
.projects-section {
  padding: 3vw var(--gutter) 6vw;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 2rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.project-card {
  position: relative;
  display: block;
  background: var(--card-bg);
  overflow: hidden;
  cursor: pointer;
  outline: none;
  border: 2px solid transparent;
  transition: border-color var(--transition);
}
.project-card:hover,
.project-card:focus-visible { border-color: var(--fg); }

.project-card-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #e8e6e1;
}

.project-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.project-card:hover .project-card-img img {
  transform: scale(1.04);
}

.project-card-info {
  padding: 1rem 1rem 1.2rem;
  border-top: 1px solid var(--border);
}

.project-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.2rem;
}

.project-card-sub {
  font-size: 0.78rem;
  color: var(--fg-subtle);
  font-weight: 400;
}

/* card hover underline */
.project-card-title::after {
  content: '';
  display: block;
  width: 0;
  height: 1.5px;
  background: var(--fg);
  transition: width 0.3s ease;
  margin-top: 3px;
}
.project-card:hover .project-card-title::after { width: 100%; }

/* ── FOOTER ────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem var(--gutter) 2.5rem;
  background: var(--bg);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.footer-contact a { font-size: 0.9rem; }
.footer-contact a:hover { text-decoration: underline; }
.footer-location { font-size: 0.82rem; color: var(--fg-muted); }

.footer-social {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.footer-social a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--fg-muted);
  transition: color var(--transition);
}
.footer-social a:hover { color: var(--fg); }
.footer-social svg { width: 16px; height: 16px; }

.footer-copy {
  width: 100%;
  margin-top: 2rem;
  font-size: 0.75rem;
  color: var(--fg-subtle);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

/* ── PROJECT / GAME PAGE LAYOUT ────────────────────────────── */
.page-main {
  padding-top: 56px;
}

.page-hero {
  padding: 4vw var(--gutter) 3vw;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.page-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-bottom: 2.5rem;
  transition: color var(--transition), gap var(--transition);
}
.page-back:hover { color: var(--fg); gap: 0.6rem; }
.page-back svg { width: 14px; height: 14px; }

.page-title {
  font-size: clamp(2.6rem, 6vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  line-height: 1;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  margin-bottom: 2rem;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.meta-pill span { color: var(--fg); font-weight: 600; }

.page-tagline {
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  max-width: 64ch;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ── PROJECT CONTENT ───────────────────────────────────────── */
.project-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.project-section {
  padding: 4vw 0;
  border-bottom: 1px solid var(--border);
}
.project-section:last-child { border-bottom: none; }

.project-section h2 {
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.project-section h3 {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  margin-bottom: 0.5rem;
}

.project-section p {
  font-size: 0.98rem;
  line-height: 1.72;
  margin-bottom: 1rem;
  color: var(--fg);
}

.project-section p:last-child { margin-bottom: 0; }

/* Two-col layout inside project sections */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Stat block */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.stat-item {
  padding: 1.2rem;
  border: 1px solid var(--border);
  background: var(--card-bg);
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 0.4rem;
}

.stat-value {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

/* ── GALLERY / IMAGE GRID ──────────────────────────────────── */
.gallery-grid {
  display: grid;
  gap: 2px;
}
.gallery-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.gallery-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.gallery-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.gallery-img-wrap {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #e8e6e1;
  cursor: zoom-in;
}
.gallery-img-wrap:hover img { transform: scale(1.03); }

.gallery-img-wrap.tall { aspect-ratio: 4 / 5; }
.gallery-img-wrap.wide { aspect-ratio: 21 / 9; grid-column: span 2; }

/* ── TABLE ─────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1rem 0;
}
th {
  text-align: left;
  padding: 0.6rem 0.8rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  border-bottom: 1.5px solid var(--border);
}
td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
tr:last-child td { border-bottom: none; }
td:first-child { font-weight: 600; }

/* ── LIST ──────────────────────────────────────────────────── */
ul.bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
ul.bullet-list li {
  padding-left: 1.2rem;
  position: relative;
  font-size: 0.95rem;
  line-height: 1.6;
}
ul.bullet-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--fg-subtle);
  font-weight: 300;
}

/* ── PLAY LINK BUTTON ──────────────────────────────────────── */
.play-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  background: var(--fg);
  color: var(--bg);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 1.5rem;
  transition: background var(--transition), color var(--transition);
}
.play-btn:hover { background: var(--fg-muted); }
.play-btn svg { width: 14px; height: 14px; }

/* ── ABOUT PAGE ────────────────────────────────────────────── */
.about-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5vw var(--gutter);
}

.about-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-body p {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.about-sidebar {
  position: sticky;
  top: 80px;
}

.about-sidebar h3 {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 0.8rem;
  margin-top: 2rem;
}
.about-sidebar h3:first-child { margin-top: 0; }

.about-sidebar p, .about-sidebar a {
  font-size: 0.88rem;
  line-height: 1.6;
}
.about-sidebar a:hover { text-decoration: underline; }

/* ── SHADER OVERLAY EFFECT ─────────────────────────────────── */
/* subtle noise texture overlay on hero */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: multiply;
  z-index: 2;
}

/* ── MOBILE HAMBURGER ──────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--fg);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 56px; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem var(--gutter);
  z-index: 99;
  flex-direction: column;
  gap: 1.2rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--fg);
  padding: 0.3rem 0;
}

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --gutter: 6vw; }

  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: 2rem; }
  .three-col { grid-template-columns: repeat(2, 1fr); }
  .about-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-sidebar { position: static; }
  .gallery-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .projects-grid { grid-template-columns: 1fr; }
  .three-col { grid-template-columns: 1fr; }
  .gallery-grid.cols-2,
  .gallery-grid.cols-3 { grid-template-columns: 1fr; }
  .gallery-img-wrap.wide { grid-column: span 1; aspect-ratio: 16 / 10; }

  .site-nav { display: none; }
  .hamburger { display: flex; }

  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { flex-direction: column; }
}

/* ── SCROLL REVEAL ANIMATION ───────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── PAGE TRANSITION ───────────────────────────────────────── */
.page-fade-in {
  animation: pageFadeIn 0.4s ease forwards;
}
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

/* ── LIGHTBOX ──────────────────────────────────────────────── */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
.lightbox-overlay.open { display: flex; }
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}
.lightbox-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.lightbox-close:hover { opacity: 1; }