/* ─────────────────────────────────────────────────────────────────────────────
   ASCII CAM WEB — style.css
   Palette: terminal green on black, cyan accents, amber active, red recording.
   Font stack: VT323 (headers) + Share Tech Mono (body/code).
   ───────────────────────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=VT323&family=Share+Tech+Mono&display=swap');

/* ── Reset & Base ───────────────────────────────────────────────────────────── */

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

:root {
  --black:      #000000;
  --green:      #00ff41;
  --green-dim:  #00aa2b;
  --green-dark: #003311;
  --cyan:       #00ffff;
  --cyan-dim:   #00aaaa;
  --amber:      #ffb000;
  --amber-dim:  #996800;
  --red:        #ff0040;
  --white:      #e8ffe8;
  --grey:       #1a1a1a;
  --border:     #00ff41;
  --glow:       0 0 6px #00ff41, 0 0 12px #00ff4199, 0 0 20px #00ff4144;
  --glow-cyan:  0 0 6px #00ffff, 0 0 12px #00ffff88;
  --glow-amber: 0 0 6px #ffb000, 0 0 12px #ffb00088;
  --glow-red:   0 0 8px #ff0040, 0 0 16px #ff004088;
  --font-display: 'VT323', 'Courier New', monospace;
  --font-mono:    'Share Tech Mono', 'Courier New', monospace;
  --transition: 0.15s linear;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Scanline overlay (applied to sections that want the CRT effect) ─────────── */

.scanlines::after {
  content: '';
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.18) 2px,
    rgba(0, 0, 0, 0.18) 4px
  );
  z-index: 10;
}

/* ── Typography ──────────────────────────────────────────────────────────────── */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.1;
}

h1 { font-size: clamp(3rem, 8vw, 7rem); text-shadow: var(--glow); color: var(--green); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); text-shadow: var(--glow); color: var(--green); }
h3 { font-size: 1.6rem; color: var(--cyan); text-shadow: var(--glow-cyan); }

a { color: var(--cyan); text-decoration: none; text-shadow: var(--glow-cyan); transition: color var(--transition); }
a:hover { color: var(--amber); text-shadow: var(--glow-amber); }

code, pre {
  font-family: var(--font-mono);
  background: var(--green-dark);
  color: var(--green);
  padding: 2px 6px;
  border-radius: 2px;
}

/* ── Section wrapper ─────────────────────────────────────────────────────────── */

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px;
}

/* ASCII divider */
.ascii-divider {
  text-align: center;
  color: var(--green-dim);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  overflow: hidden;
  white-space: pre;
  user-select: none;
  padding: 4px 0;
  opacity: 0.6;
}

/* ── Navigation ──────────────────────────────────────────────────────────────── */

#top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0,0,0,0.92);
  border-bottom: 1px solid var(--green-dim);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 28px;
}

#top-nav .nav-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--green);
  text-shadow: var(--glow);
  letter-spacing: 0.12em;
}

#top-nav ul {
  display: flex;
  gap: 24px;
  list-style: none;
}

#top-nav ul a {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  text-shadow: none;
  transition: color var(--transition), text-shadow var(--transition);
}
#top-nav ul a:hover { color: var(--cyan); text-shadow: var(--glow-cyan); }

/* ── Hero ────────────────────────────────────────────────────────────────────── */

#hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 80px 24px 60px;
  border-bottom: 1px solid var(--green-dim);
}

#hero .hero-pre {
  font-family: var(--font-mono);
  font-size: clamp(0.5rem, 1.3vw, 0.9rem);
  color: var(--green-dim);
  white-space: pre;
  line-height: 1.2;
  user-select: none;
  margin-bottom: 16px;
  opacity: 0.7;
}

#hero h1 {
  letter-spacing: 0.25em;
  margin-bottom: 16px;
}

#hero .tagline {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 36px;
}

#hero .tagline::after {
  content: '_';
  animation: blink 1s step-end infinite;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.hero-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 32px;
}

.badge {
  border: 1px solid var(--green-dim);
  padding: 4px 12px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-dim);
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */

.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
  padding: 8px 20px;
  text-transform: uppercase;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  user-select: none;
}

.btn:hover {
  background: var(--green);
  color: var(--black);
  box-shadow: var(--glow);
}

.btn-primary {
  border-color: var(--cyan);
  color: var(--cyan);
}
.btn-primary:hover {
  background: var(--cyan);
  color: var(--black);
  box-shadow: var(--glow-cyan);
}

.btn.recording {
  border-color: var(--red);
  color: var(--red);
  animation: rec-pulse 1.2s ease-in-out infinite;
}
.btn.recording:hover {
  background: var(--red);
  color: var(--black);
  box-shadow: var(--glow-red);
}

@keyframes rec-pulse {
  0%, 100% { box-shadow: none; }
  50%       { box-shadow: var(--glow-red); }
}

/* ── Demo section ────────────────────────────────────────────────────────────── */

#demo {
  padding: 40px 0;
  border-bottom: 1px solid var(--green-dim);
  background: #020d02;
}

#demo .section-header {
  max-width: 1100px;
  margin: 0 auto 24px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

#demo .section-header h2 {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Terminal window chrome */
.terminal-window {
  max-width: 1100px;
  margin: 0 auto;
  border: 1px solid var(--green);
  box-shadow: var(--glow);
  position: relative;
  background: var(--black);
}

.terminal-titlebar {
  background: var(--green-dark);
  border-bottom: 1px solid var(--green-dim);
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--green-dim);
  user-select: none;
}

.term-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid currentColor;
}
.term-dot.red    { color: #ff5f57; background: #ff5f57; }
.term-dot.yellow { color: #febc2e; background: #febc2e; }
.term-dot.green  { color: #28c840; background: #28c840; }

.term-title {
  flex: 1;
  text-align: center;
}

/* Demo body — canvas + sidebar */
.demo-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  min-height: 420px;
}

/* Canvas area */
.canvas-wrap {
  position: relative;
  overflow: hidden;
  background: var(--black);
  aspect-ratio: 16 / 9;
}

#ascii-canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}

#feed-video { display: none; }

/* Camera permission overlay */
#cam-permission {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--green-dim);
  font-size: 0.9rem;
  gap: 12px;
  letter-spacing: 0.1em;
}

/* Status bar overlay on canvas */
#status-bar {
  position: absolute;
  bottom: 8px;
  left: 8px;
  font-size: 0.7rem;
  color: var(--green);
  background: rgba(0,0,0,0.7);
  padding: 4px 8px;
  letter-spacing: 0.06em;
  pointer-events: none;
}

#fps-display {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 0.7rem;
  color: var(--amber);
  background: rgba(0,0,0,0.7);
  padding: 4px 8px;
  pointer-events: none;
  text-shadow: var(--glow-amber);
}

#mode-label {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 0.7rem;
  color: var(--cyan);
  background: rgba(0,0,0,0.7);
  padding: 4px 8px;
  pointer-events: none;
  text-shadow: var(--glow-cyan);
}

/* ── Settings sidebar ────────────────────────────────────────────────────────── */

#settings-panel {
  border-left: 1px solid var(--green-dark);
  padding: 16px;
  overflow-y: auto;
  max-height: 560px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-group label,
.setting-group .group-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--green-dim);
}

/* Mode radio buttons */
.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.mode-btn {
  cursor: pointer;
}

.mode-btn input[type="radio"] { display: none; }

.mode-btn span {
  display: block;
  border: 1px solid var(--green-dark);
  padding: 6px 4px;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--green-dim);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.mode-btn input:checked + span {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 255, 255, 0.07);
  text-shadow: var(--glow-cyan);
}

.mode-btn span:hover {
  border-color: var(--green);
  color: var(--green);
}

/* Sliders */
.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-row input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  height: 2px;
}

.slider-row input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--green-dark);
  border: 1px solid var(--green-dim);
}
.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  background: var(--green);
  border-radius: 0;
  margin-top: -6px;
  box-shadow: 0 0 4px var(--green);
  cursor: pointer;
}
.slider-row input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--green-dark);
  border: 1px solid var(--green-dim);
}
.slider-row input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  background: var(--green);
  border-radius: 0;
  border: none;
  box-shadow: 0 0 4px var(--green);
  cursor: pointer;
}

.slider-value {
  font-size: 0.72rem;
  color: var(--amber);
  min-width: 50px;
  text-align: right;
  text-shadow: var(--glow-amber);
}

/* Select */
select {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--black);
  color: var(--green);
  border: 1px solid var(--green-dim);
  padding: 4px 8px;
  width: 100%;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  letter-spacing: 0.06em;
}

select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 6px var(--cyan);
}

/* Color pickers */
.color-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.color-pick {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.color-pick label {
  font-size: 0.65rem;
  color: var(--green-dim);
  letter-spacing: 0.1em;
}

.color-pick input[type="color"] {
  width: 100%;
  height: 30px;
  border: 1px solid var(--green-dim);
  background: var(--black);
  cursor: pointer;
  padding: 2px;
}

.color-pick input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-pick input[type="color"]::-webkit-color-swatch { border: none; }

/* Action buttons in panel */
.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.action-buttons .btn {
  width: 100%;
  text-align: center;
  font-size: 0.78rem;
  padding: 7px 10px;
}

/* Mobile settings toggle */
#settings-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--green-dim);
  color: var(--green-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 5px 12px;
  cursor: pointer;
  letter-spacing: 0.08em;
}

/* ── About section ───────────────────────────────────────────────────────────── */

#about { position: relative; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 32px;
}

.about-text p {
  color: var(--white);
  line-height: 1.8;
  margin-bottom: 14px;
  font-size: 0.92rem;
}

.about-ascii {
  font-family: var(--font-mono);
  font-size: clamp(0.4rem, 1vw, 0.65rem);
  color: var(--green-dim);
  line-height: 1.1;
  white-space: pre;
  user-select: none;
  text-align: center;
  padding-top: 8px;
  opacity: 0.8;
}

/* ── How It Works ────────────────────────────────────────────────────────────── */

#how-it-works { background: #020d02; padding: 60px 0; }
#how-it-works .section { padding-top: 0; padding-bottom: 0; }

.pipeline {
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.pipe-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  min-width: 110px;
}

.pipe-icon {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
  line-height: 1;
}

.pipe-label {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-dim);
}

.pipe-arrow {
  font-size: 1.2rem;
  color: var(--green-dim);
  margin: 0 4px;
  padding-bottom: 20px;
  user-select: none;
}

.steps-list {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.step-card {
  border: 1px solid var(--green-dark);
  padding: 18px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.step-card:hover {
  border-color: var(--green);
  box-shadow: var(--glow);
}

.step-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--green-dark);
  position: absolute;
  top: 8px;
  right: 12px;
  line-height: 1;
  user-select: none;
}

.step-card h4 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.82rem;
  color: var(--white);
  line-height: 1.7;
}

/* ── Modes ───────────────────────────────────────────────────────────────────── */

#modes { padding-bottom: 0; }

.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.mode-card {
  border: 1px solid var(--green-dark);
  padding: 0;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
  cursor: default;
}

.mode-card:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.mode-card-preview {
  background: var(--green-dark);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: clamp(0.38rem, 0.9vw, 0.6rem);
  line-height: 1.1;
  color: var(--green);
  white-space: pre;
  overflow: hidden;
  max-height: 130px;
  user-select: none;
}

.mode-card:nth-child(2) .mode-card-preview { color: #00ffff44; }
.mode-card:nth-child(2) .mode-card-preview span { color: var(--cyan); }
.mode-card:nth-child(3) .mode-card-preview { color: #00ff4144; }
.mode-card:nth-child(3) .mode-card-preview span { color: var(--green); }
.mode-card:nth-child(4) .mode-card-preview { color: transparent; }
.mode-card:nth-child(4) .mode-card-preview span { color: var(--amber); }

.mode-card-info {
  padding: 14px;
}

.mode-card-info h3 {
  font-size: 1rem;
  font-family: var(--font-mono);
  margin-bottom: 6px;
  color: var(--green);
  text-shadow: none;
}

.mode-card-info p {
  font-size: 0.78rem;
  color: var(--white);
  line-height: 1.6;
}

/* ── Tech Stack ──────────────────────────────────────────────────────────────── */

#tech-stack { background: #020d02; padding: 60px 0; }
#tech-stack .section { padding-top: 0; padding-bottom: 0; }

.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 32px;
}

.tech-col h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
  color: var(--cyan);
  text-shadow: var(--glow-cyan);
}

.tech-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--green-dark);
  transition: border-color var(--transition);
}

.tech-item:hover { border-color: var(--green); }

.tech-icon {
  font-size: 1.3rem;
  line-height: 1;
  flex-shrink: 0;
  color: var(--green);
  text-shadow: var(--glow);
}

.tech-name {
  font-size: 0.82rem;
  color: var(--green);
  margin-bottom: 2px;
  letter-spacing: 0.06em;
}

.tech-desc {
  font-size: 0.73rem;
  color: var(--white);
  line-height: 1.5;
}

/* ── Source / GitHub ─────────────────────────────────────────────────────────── */

#source { padding-bottom: 60px; }

.source-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}

.repo-card {
  border: 1px solid var(--green);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.repo-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.repo-card:hover { box-shadow: var(--glow); }

.repo-card.new-repo { border-color: var(--cyan); }
.repo-card.new-repo::before { background: linear-gradient(90deg, transparent, var(--cyan), transparent); }
.repo-card.new-repo:hover { box-shadow: var(--glow-cyan); }

.repo-lang {
  display: inline-block;
  border: 1px solid currentColor;
  padding: 2px 8px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--green-dim);
}

.repo-card.new-repo .repo-lang { color: var(--cyan-dim); }

.repo-card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--green);
  text-shadow: none;
}

.repo-card.new-repo h3 { color: var(--cyan); }

.repo-card p {
  font-size: 0.8rem;
  color: var(--white);
  line-height: 1.6;
  margin-bottom: 16px;
}

.repo-link {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--green);
  text-shadow: var(--glow);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.repo-card.new-repo .repo-link { color: var(--cyan); text-shadow: var(--glow-cyan); }

/* ── Footer ──────────────────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--green-dark);
  padding: 32px 24px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--green-dim);
  letter-spacing: 0.08em;
}

footer a { color: var(--green-dim); }
footer a:hover { color: var(--green); }

/* ── Toast notification ──────────────────────────────────────────────────────── */

#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--green-dark);
  color: var(--green);
  border: 1px solid var(--green);
  padding: 10px 20px;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 9999;
  transition: transform 0.25s ease, opacity 0.25s ease;
  opacity: 0;
  box-shadow: var(--glow);
  pointer-events: none;
}

#toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ── Glitch effect on section titles ─────────────────────────────────────────── */

.glitch {
  position: relative;
  display: inline-block;
}

.glitch:hover::before,
.glitch:hover::after {
  content: attr(data-text);
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.glitch:hover::before {
  color: var(--cyan);
  animation: glitch-1 0.35s steps(2) infinite;
  clip-path: polygon(0 20%, 100% 20%, 100% 40%, 0 40%);
}

.glitch:hover::after {
  color: var(--red);
  animation: glitch-2 0.35s steps(2) infinite;
  clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%);
}

@keyframes glitch-1 {
  0%   { transform: translateX(-3px); }
  50%  { transform: translateX(3px); }
  100% { transform: translateX(-1px); }
}

@keyframes glitch-2 {
  0%   { transform: translateX(3px); }
  50%  { transform: translateX(-3px); }
  100% { transform: translateX(1px); }
}

/* Section title decorators */
.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}

.section-title::before {
  content: '▶';
  color: var(--amber);
  text-shadow: var(--glow-amber);
  font-size: 0.9em;
  flex-shrink: 0;
}

.section-sub {
  color: var(--green-dim);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */

@media (max-width: 820px) {
  .demo-body {
    grid-template-columns: 1fr;
  }

  #settings-panel {
    border-left: none;
    border-top: 1px solid var(--green-dark);
    max-height: 0;
    overflow: hidden;
    padding: 0 16px;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }

  #settings-panel.open {
    max-height: 600px;
    padding: 16px;
  }

  #settings-toggle { display: flex; }

  .about-grid,
  .tech-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .steps-list {
    grid-template-columns: 1fr;
  }

  .pipeline {
    gap: 4px;
  }

  .pipe-arrow { display: none; }

  #top-nav ul { gap: 12px; }

  #top-nav ul li:nth-child(n+5) { display: none; }
}

@media (max-width: 480px) {
  .modes-grid { grid-template-columns: 1fr 1fr; }
  .mode-card-preview { font-size: 0.32rem; }
  #top-nav ul { display: none; }
}