/* ── Design Tokens ── */
:root {
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-6: 1.5rem; --space-8: 2rem;
  --space-10: 2.5rem; --space-12: 3rem; --space-16: 4rem;
  --space-20: 5rem; --space-24: 6rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem; --radius-xl: 1rem;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-default: 960px; --content-wide: 1200px;

  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* EMCTees brand palette — dark-first */
  --color-bg: #0D0D0D;
  --color-surface: #141414;
  --color-surface-2: #1A1A1A;
  --color-border: #2A2A2A;
  --color-text: #F0EDE5;
  --color-text-muted: #888888;
  --color-text-faint: #555555;
  --color-primary: #20808D;
  --color-primary-hover: #2A9DAD;
  --color-gold: #D4A853;
  --color-gold-hover: #E0BA6A;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3 { text-wrap: balance; line-height: 1.15; }
p { text-wrap: pretty; max-width: 72ch; }
a, button, input, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive);
}
button { cursor: pointer; background: none; border: none; }

/* ── Header ── */
.site-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.logo svg { color: var(--color-primary); flex-shrink: 0; }
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}
.logo-sub {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: var(--space-20) var(--space-6) var(--space-12);
  max-width: var(--content-default);
  margin: 0 auto;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Section prompt */
.section-prompt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-4);
}

/* Panel label */
.panel-label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  margin-bottom: calc(-1 * var(--space-2));
}

/* ── Generator ── */
.generator {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-16);
}

/* Controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: flex-end;
  margin-bottom: var(--space-8);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
  min-width: 140px;
}
.input-group label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}
.input-group input,
.input-group select {
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  color: var(--color-text);
}
.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(32, 128, 141, 0.2);
}
.input-group select {
  font-family: var(--font-body);
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23888' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: var(--space-8);
}
.btn-generate {
  padding: var(--space-2) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  min-width: 120px;
}
.btn-generate:hover { background: var(--color-primary-hover); }

/* Donate button */
.donate-btn {
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-md);
  background: transparent;
  transition: background var(--transition-interactive),
              color var(--transition-interactive);
}
.donate-btn:hover {
  background: rgba(212, 168, 83, 0.1);
}
.donate-btn.unlocked {
  color: var(--color-text-muted);
  border-color: var(--color-border);
  cursor: default;
  opacity: 0.6;
}
.donate-btn.unlocked:hover {
  background: transparent;
}

/* ── Toggle Panel (always visible) ── */
.toggle-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* Unlock row spans full width under sliders */
.toggle-row-unlock {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

/* Render controls — indicator + Rendered/Reset buttons */
.render-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.render-indicator {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* Rendered button — teal outline, fills on active */
.btn-rendered {
  padding: var(--space-1) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: transparent;
  transition: background var(--transition-interactive),
              color var(--transition-interactive);
}
.btn-rendered:hover {
  background: rgba(32, 128, 141, 0.1);
}
.btn-rendered.active {
  background: var(--color-primary);
  color: var(--color-text);
}

.toggle-row label {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.toggle-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.lock-icon {
  font-size: 12px;
  opacity: 0.5;
}

/* Range slider base */
.toggle-panel input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--color-surface-2);
  outline: none;
  transition: opacity var(--transition-interactive);
}
.toggle-panel input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--color-primary);
  transition: background var(--transition-interactive);
}
.toggle-panel input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--color-primary);
}
.toggle-panel input[type="range"]:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 2px rgba(32, 128, 141, 0.3);
}

/* Locked state */
.toggle-panel input[type="range"].locked {
  opacity: 0.3;
  pointer-events: none;
}
.toggle-panel input[type="range"].locked::-webkit-slider-thumb {
  background: var(--color-text-faint);
  box-shadow: none;
  cursor: not-allowed;
}
.toggle-panel input[type="range"].locked::-moz-range-thumb {
  background: var(--color-text-faint);
  box-shadow: none;
  cursor: not-allowed;
}

/* Canvas area */
.canvas-container {
  margin-bottom: var(--space-8);
}
.canvas-frame {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1;
}
.canvas-frame canvas {
  width: 100%;
  height: 100%;
}
.canvas-label {
  position: absolute;
  bottom: 12px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.callout {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: rgba(240, 237, 229, 0.5);
  letter-spacing: 0.04em;
}

/* Shirt preview */
.shirt-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.shirt-silhouette {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.shirt-silhouette canvas {
  width: 300px;
  height: 360px;
}
.shirt-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Planet data readout */
.planet-data {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.planet-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-2) var(--space-3);
}
.planet-name {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.planet-pos {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
}
.planet-sign {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ── Explainer ── */
.explainer {
  max-width: var(--content-default);
  margin: 0 auto;
  padding: var(--space-16) var(--space-6);
  border-top: 1px solid var(--color-border);
}
.explainer h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-8);
  text-align: center;
  letter-spacing: -0.02em;
}
.explainer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.explainer-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.card-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-weight: 500;
}
.explainer-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}
.explainer-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Materials Note ── */
.materials-note {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-6) var(--space-16);
  border-top: 1px solid var(--color-border);
}
.materials-note p {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.8;
  color: var(--color-text-faint);
  letter-spacing: 0.01em;
}
.materials-closing {
  margin-top: var(--space-4);
  color: var(--color-text-muted) !important;
  font-weight: 500;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}
.footer-mark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.footer-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}
footer a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  opacity: 0.5;
}
footer a:hover { color: var(--color-text-muted); opacity: 1; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .shirt-silhouette canvas { width: 240px; height: 288px; }

  .explainer-grid { grid-template-columns: 1fr; }
  .controls { flex-direction: column; }
  .input-group { min-width: 100%; }
  .toggle-panel {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  /* Bigger touch targets on mobile */
  .toggle-panel input[type="range"] {
    height: 6px;
  }
  .toggle-panel input[type="range"]::-webkit-slider-thumb {
    width: 22px;
    height: 22px;
  }
  .toggle-panel input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
  }
  .toggle-row-unlock {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
    text-align: center;
  }
  .render-controls {
    justify-content: center;
    flex-wrap: wrap;
  }
}