/* THE TEA — design tokens (tea.energy)
 * Mirrored light/dark. All colors from handoff-v3.10.
 * Page is never pure white. No gradients, no metallic.
 */

:root {
  /* Brand */
  --steep:   #3a6b45;
  --steep-2: #2f5638;
  --steep-3: #244229;
  --cream:   #f5f1e8;
  --cream-2: #ebe5d4;
  --stone:   #9a958a;

  /* Tea categories */
  --tea-green:  #4a7c59;
  --tea-red:    #8b2500;
  --tea-yellow: #c5a63d;
  --tea-oolong: #b87333;
  --tea-white:  #b0a18c;
  --tea-dark:   #3e2723;
  --tea-puerh:  #4e342e;

  /* Light surface */
  --bg:        #f5f1e8;
  --bg-raised: #fafaf3;
  --bg-sunk:   #ece6d6;
  --fg-1:      #1f1d18;
  --fg-2:      #5a554a;
  --fg-3:      #8a857a;
  --hair:      rgba(31,29,24,0.08);
  --hair-2:    rgba(31,29,24,0.14);
  --grid:      rgba(31,29,24,0.05);
  --highlight: rgba(197,166,61,0.18);

  /* Type */
  --font-sans: 'IBM Plex Sans','SF Pro Text',Inter,system-ui,sans-serif;
  --font-serif: 'Noto Serif SC','Songti SC',serif;
  --font-mono: 'JetBrains Mono','SF Mono',ui-monospace,monospace;

  /* Type scale ×1.6 */
  --t-large: 26px;
  --t-title: 22px;
  --t-title2: 19px;
  --t-title3: 18px;
  --t-headline: 16px;
  --t-body: 14px;
  --t-foot: 12px;
  --t-caption: 11px;
  --t-micro: 10px;

  /* Spacing ×2 */
  --s-xs: 4px;
  --s-sm: 6px;
  --s-md: 10px;
  --s-lg: 12px;
  --s-xl: 18px;
  --s-xxl: 24px;
  --s-xxxl: 32px;
  --s-xxxxl: 48px;

  /* Radii */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-pill: 999px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --d-fast: 100ms;
  --d-med: 200ms;
  --d-slow: 400ms;
  --d-vslow: 800ms;
}

[data-theme='dark'] {
  --bg:        #1a1814;
  --bg-raised: #252220;
  --bg-sunk:   #14120f;
  --fg-1:      #f0ebe0;
  --fg-2:      #9a958a;
  --fg-3:      #6a655a;
  --hair:      rgba(240,235,224,0.10);
  --hair-2:    rgba(240,235,224,0.16);
  --grid:      rgba(240,235,224,0.05);
  --highlight: rgba(197,166,61,0.18);

  --steep:   #5a8d65;
  --steep-2: #6f9d78;
  --cream:   #1a1814;
  --cream-2: #252220;
}

/* Base */
.tt-root {
  background: var(--bg);
  color: var(--fg-1);
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: 1.55;
  font-feature-settings: "ss01","cv02","cv11";
  -webkit-font-smoothing: antialiased;
}
.tt-root * { box-sizing: border-box; }
.tt-mono { font-family: var(--font-mono); font-feature-settings: "zero","ss02"; }
.tt-serif { font-family: var(--font-serif); }
.tt-pinyin { font-style: italic; }

/* Grid paper bg */
.tt-paper {
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -1px -1px;
}

/* Hairline rules */
.tt-hair { border-bottom: 1px solid var(--hair); }
.tt-hair-top { border-top: 1px solid var(--hair); }
.tt-hair-l { border-left: 1px solid var(--hair); }
.tt-hair-r { border-right: 1px solid var(--hair); }

/* Eyebrow / specimen labels */
.tt-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tt-eyebrow::before {
  content: '';
  width: 16px; height: 1px;
  background: var(--fg-2);
}

/* Measurement annotation pill */
.tt-meas {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  color: var(--fg-2);
  background: var(--bg-raised);
  border: 1px solid var(--hair);
  padding: 2px 6px;
  border-radius: var(--r-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  line-height: 1.2;
}

/* Big number readout */
.tt-readout {
  font-family: var(--font-mono);
  font-feature-settings: "tnum","zero";
  letter-spacing: -0.02em;
  line-height: 1;
}

/* Buttons */
.tt-btn {
  font: 500 var(--t-body)/1 var(--font-sans);
  border: 1px solid var(--fg-1);
  background: var(--fg-1);
  color: var(--bg);
  padding: 12px 18px;
  border-radius: var(--r-pill);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--d-med) var(--ease);
}
.tt-btn:hover { transform: translateY(-1px); }
.tt-btn--ghost {
  background: transparent;
  color: var(--fg-1);
  border-color: var(--hair-2);
}
.tt-btn--steep {
  background: var(--steep);
  border-color: var(--steep);
  color: var(--cream);
}
[data-theme='dark'] .tt-btn--steep { color: #f0ebe0; }

/* Card */
.tt-card {
  background: var(--bg-raised);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
}

/* Tea chip */
.tt-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  color: var(--fg-2);
  padding: 3px 10px 3px 7px;
  background: var(--bg-raised);
  border: 1px solid var(--hair);
  border-radius: var(--r-pill);
}
.tt-chip::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--dot, var(--steep));
}

/* Annotation w/ arrow */
.tt-annot {
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  color: var(--fg-2);
  font-style: italic;
  line-height: 1.4;
}

/* Image slot — striped */
.tt-slot {
  background:
    repeating-linear-gradient(135deg,
      var(--hair) 0 1px,
      transparent 1px 8px),
    var(--bg-sunk);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: var(--t-caption);
  text-transform: lowercase;
  position: relative;
  overflow: hidden;
}
.tt-slot::after {
  content: attr(data-label);
  padding: 4px 8px;
  background: var(--bg);
  border: 1px solid var(--hair);
  border-radius: var(--r-sm);
}

/* Solid tile (tea-color) — for less-important imagery */
.tt-tile {
  border-radius: var(--r-md);
  background: var(--fill, var(--tea-green));
  position: relative;
  overflow: hidden;
}
.tt-tile::before {
  content: '';
  position: absolute; inset: 0;
  background: repeating-linear-gradient(135deg,
    rgba(0,0,0,0.04) 0 1px, transparent 1px 16px);
}

/* Focus ring */
*:focus-visible {
  outline: 2px solid var(--steep);
  outline-offset: 2px;
}