/* ============================================================
   p5.waves Showcase – Sober B&W, Oswald titles
   ============================================================ */

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

:root {
  --bg:          #f5f5f5;
  --bg2:         #eeeeee;
  --bg3:         #e4e4e4;
  --surface:     #ffffff;
  --border:      rgba(0, 0, 0, 0.1);
  --border-mid:  rgba(0, 0, 0, 0.2);
  --border-hard: rgba(0, 0, 0, 0.7);
  --text:        #111111;
  --text-muted:  #666666;
  --text-faint:  #999999;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ── TYPOGRAPHY ── */
h1, h2, h3, .nav-logo, .stat-num, .cta-btn, .hero-badge {
  font-family: 'Oswald', sans-serif;
}

/* ── NAV ── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 2.5rem;
  background: rgba(245, 245, 245, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-mid);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}

.nav-logo span { color: #000; border-bottom: 2px solid #000; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
  transition: color 0.15s;
}

.nav-links a:hover { color: #000; }

/* All content above the fixed bg-canvas */
#hero, .section, .showcase-section, footer {
  position: relative;
  z-index: 1;
}

/* ── HERO ── */
#hero {
  position: relative;
  z-index: 1;
  height: 100vh;
  min-height: 580px;
  overflow: hidden;
}

/* (bg-canvas removed) */

#hero-canvas {
  position: absolute;
  inset: 0;
}

#hero-canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center,
    rgba(245,245,245,0.15) 0%,
    rgba(245,245,245,0.75) 100%);
  pointer-events: none;
}

.hero-text {
  text-align: center;
  pointer-events: auto;
}

.hero-badge {
  display: inline-block;
  padding: 0.3rem 1rem;
  border: 1px solid var(--border-hard);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.hero-text h1 {
  font-size: clamp(3.5rem, 11vw, 8rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: none;
  color: #000;
  margin-bottom: 1.2rem;
}

.hero-sub {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3.5rem;
  margin-bottom: 2.5rem;
}

.stat { display: flex; flex-direction: column; align-items: center; gap: 0.2rem; }

.stat-num {
  font-size: 2.4rem;
  font-weight: 700;
  color: #000;
  letter-spacing: 0.02em;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
}

.cta-btn {
  display: inline-block;
  padding: 0.8rem 2.5rem;
  background: #000;
  color: #fff;
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  transition: background 0.15s;
}

.cta-btn:hover { background: #333; }

/* ── SECTIONS ── */
.section {
  padding: 6rem 2rem;
}

.section-dark {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border: 1px solid var(--border-mid);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: 'Consolas', monospace;
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #000;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.97rem;
}

.accent { color: #000; }

/* ── GALLERY ── */
#gallery-canvas {
  max-width: 1200px;
  margin: 0 auto;
  border: 1px solid var(--border-mid);
  overflow: hidden;
}

#gallery-canvas canvas {
  display: block;
  width: 100% !important;
}

/* ── INTERACTIVE ── */
.interactive-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  align-items: stretch;
}

.controls-panel {
  background: var(--surface);
  border: 1px solid var(--border-mid);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  position: sticky;
  top: 70px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.control-group label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
}

.control-group label span {
  color: #000;
  font-family: 'Consolas', monospace;
  font-size: 0.75rem;
}

.control-group select,
.control-group input[type="range"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-mid);
  color: var(--text);
  padding: 0.45rem 0.65rem;
  font-size: 0.85rem;
  border-radius: 0;
  appearance: auto;
}

.control-group input[type="range"] {
  padding: 0;
  cursor: pointer;
  accent-color: #000;
}

.checkbox-group { gap: 0.5rem; }

.check-label {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem !important;
  color: var(--text-muted);
  cursor: pointer;
  justify-content: flex-start !important;
  font-family: 'Inter', sans-serif !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
}

.check-label input[type="checkbox"] {
  accent-color: #000;
  width: 14px;
  height: 14px;
}

.code-preview {
  background: #111;
  padding: 0.75rem;
  margin-top: 0.25rem;
}

.code-preview code {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.7rem;
  color: #ccc;
  white-space: pre-wrap;
  line-height: 1.65;
}

#interactive-canvas {
  border: 1px solid var(--border-mid);
  overflow: hidden;
}

#interactive-canvas canvas {
  display: block;
  width: 100% !important;
}

/* (grid section removed) */

/* ── SHIFT ── */
.shift-layout {
  max-width: 1200px;
  margin: 0 auto;
}

#shift-canvas {
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-mid);
  overflow: hidden;
}

#shift-canvas canvas {
  display: block;
  width: 100% !important;
}

.shift-controls {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.shift-controls label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.shift-controls input[type="range"] {
  accent-color: #fff;
  cursor: pointer;
}

.shift-code-preview {
  margin-top: 1rem;
}

/* (poster section removed) */

/* (wild section removed) */

/* ── TERRAIN ── */
.terrain-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

#terrain-canvas {
  border: 1px solid var(--border-mid);
  overflow: hidden;
}

#terrain-canvas canvas {
  display: block;
  width: 100% !important;
}

.terrain-controls {
  background: var(--surface);
  border: 1px solid var(--border-mid);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: sticky;
  top: 70px;
}

.terrain-code-preview {
  margin-top: 0.25rem;
}

.terrain-code-preview code {
  font-size: 0.66rem;
}

/* ── FOOTER ── */
footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-mid);
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.9;
}

footer a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

footer a:hover { color: #000; }

.footer-sub {
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #aaa; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ── NAV ANCHOR FIX (scroll-margin-top) ── */
/* Prevents the fixed nav bar from covering section titles on anchor navigation */
section[id] {
  scroll-margin-top: 62px;
}


/* ── GUIDE ── */
.guide-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 6rem 2rem 5rem;
}

.guide-wrap h1 { font-family: 'Oswald', sans-serif; font-size: 2.8rem; margin-bottom: 0.3rem; }
.guide-wrap h2 { font-family: 'Oswald', sans-serif; font-size: 1.5rem; margin: 3rem 0 0.7rem; text-transform: uppercase; letter-spacing: .05em; border-bottom: 2px solid #000; padding-bottom: 0.3rem; }
.guide-wrap h3 { font-family: 'Oswald', sans-serif; font-size: 1.1rem; margin: 1.8rem 0 0.4rem; text-transform: uppercase; letter-spacing: .04em; }
.guide-wrap p  { line-height: 1.7; margin-bottom: 0.8rem; color: var(--text-muted); }
.guide-wrap a  { color: #000; text-decoration: underline; }
.guide-wrap a:hover { color: #555; }
.guide-wrap code { font-family: 'Courier New', monospace; font-size: 0.88em; background: #ebebeb; padding: 0.1em 0.35em; }
.guide-intro { font-size: 1.1rem; color: var(--text); margin-bottom: 2rem; }

.callout {
  border-left: 3px solid #000;
  background: #f5f5f5;
  padding: 0.9rem 1.2rem;
  margin: 1.2rem 0;
}
.callout p { margin: 0; }
.callout code { background: #e2e2e2; }

.code-block {
  background: #1a1a1a;
  color: #e8e8e8;
  padding: 1.2rem 1.4rem;
  margin: 0.8rem 0 1.4rem;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.84rem;
  line-height: 1.6;
  white-space: pre;
}
.code-block .cm { color: #777; }
.code-block .kw { color: #c792ea; }
.code-block .fn { color: #82aaff; }
.code-block .st { color: #c3e88d; }
.code-block .nb { color: #f78c6c; }
.code-block .op { color: #89ddff; }

.opts-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.8rem 0 1.4rem;
  font-size: 0.84rem;
}
.opts-table th {
  text-align: left;
  font-family: 'Oswald', sans-serif;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 0.4rem 0.8rem;
  background: #000;
  color: #fff;
}
.opts-table td {
  padding: 0.45rem 0.8rem;
  border-bottom: 1px solid #e8e8e8;
  color: var(--text);
  vertical-align: top;
}
.opts-table tr:last-child td { border-bottom: none; }
.opts-table td:first-child { font-family: 'Courier New', monospace; white-space: nowrap; }
.opts-table td:nth-child(3) { color: var(--text-muted); }
.compliance-table td:first-child { font-family: inherit; white-space: normal; }
.compliance-table td:nth-child(2) { color: #3a7a3a; }

.wave-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.4rem;
  margin: 0.8rem 0 1.4rem;
}
.wave-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.4rem 0.7rem;
  background: #f5f5f5;
  font-size: 0.84rem;
  color: var(--text);
}
.wave-item .wi { color: var(--text-faint); font-family: 'Courier New', monospace; min-width: 1.6rem; }

.step-list { list-style: none; padding: 0; margin: 0.5rem 0 1.4rem; counter-reset: steps; }
.step-list li { counter-increment: steps; display: flex; gap: 1rem; margin-bottom: 0.9rem; }
.step-list li::before { content: counter(steps); font-family: 'Oswald', sans-serif; font-size: 1.1rem; background: #000; color: #fff; min-width: 1.8rem; height: 1.8rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 0.1rem; }
.step-list li p { margin: 0; line-height: 1.6; }

.note { display: inline-block; font-size: 0.72rem; font-family: 'Oswald', sans-serif; text-transform: uppercase; letter-spacing: .08em; background: #000; color: #fff; padding: 0.15em 0.5em; margin-right: 0.4rem; vertical-align: middle; }

/* ── EXAMPLES PAGE ── */
.ex-page-header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 7rem 2rem 3rem;
  text-align: center;
}
.ex-page-header h1 { font-family: 'Oswald', sans-serif; font-size: 2.8rem; margin-bottom: 0.6rem; }
.ex-page-header > p { max-width: 620px; margin-left: auto; margin-right: auto; line-height: 1.7; color: var(--text-muted); margin-bottom: 2rem; }

.ex-lab-card {
  display: inline-block;
  text-align: left;
  text-decoration: none;
  border: 1px solid var(--border-hard);
  background: #000;
  color: #fff;
  padding: 1.2rem 1.6rem;
  max-width: 400px;
  transition: background 0.15s;
}
.ex-lab-card:hover { background: #1a1a1a; }
.ex-lab-card .section-tag { color: #777; border-color: #444; margin-bottom: 0.4rem; }
.ex-lab-card strong { display: block; font-family: 'Oswald', sans-serif; font-size: 1.15rem; letter-spacing: .04em; margin-bottom: 0.35rem; color: #fff; }
.ex-lab-card p { font-size: 0.84rem; color: #999; margin: 0; line-height: 1.5; }

.ex-preview {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  max-width: 360px;
  margin: 0 auto;
}

.ex-full-link {
  display: inline-block;
  font-family: 'Oswald', sans-serif;
  font-size: 0.72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border-mid);
  transition: color 0.15s, border-color 0.15s;
}
.ex-full-link:hover { color: #000; border-color: #000; }

.ex-canvas { overflow: hidden; background: var(--bg); border: 1px solid var(--border-mid); width: 100%; }
.ex-canvas canvas { display: block !important; width: 100% !important; }
.section-dark .ex-canvas { background: var(--bg2); }

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 101;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
#navbar.nav-open .nav-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#navbar.nav-open .nav-hamburger span:nth-child(2) { opacity: 0; }
#navbar.nav-open .nav-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .interactive-layout { grid-template-columns: 1fr; }
  .controls-panel { position: static; }
  .grid-layout { grid-template-columns: 1fr; }
  .terrain-layout { grid-template-columns: 1fr; }
  .terrain-controls { position: static; }

  .nav-hamburger { display: flex; }

  .nav-links {
    display: none;
    position: fixed;
    top: 52px;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(245, 245, 245, 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-mid);
    padding: 0.5rem 0 1rem;
  }
  #navbar.nav-open .nav-links { display: flex; }
  .nav-links li { padding: 0; }
  .nav-links a { display: block; padding: 0.75rem 2rem; font-size: 0.9rem; }
}