/* ═══════════════════════════════════════════════════════════
   P1-v2 — Vercel Geist–inspired design tokens
   Light mode, minimalist, for Context Grammar UI mockups
   ═══════════════════════════════════════════════════════════ */

:root {
  /* ── Geist Neutral Scale (light) ── */
  --gray-50:   #fafafa;
  --gray-100:  #f4f4f5;
  --gray-200:  #e4e4e7;
  --gray-300:  #d4d4d8;
  --gray-400:  #a1a1aa;
  --gray-500:  #71717a;
  --gray-600:  #52525b;
  --gray-700:  #3f3f46;
  --gray-800:  #27272a;
  --gray-900:  #18181b;
  --gray-950:  #09090b;

  /* ── Surface ── */
  --bg:        #ffffff;
  --bg-subtle: #fafafa;
  --bg-muted:  #f4f4f5;
  --fg:        #0a0a0a;
  --fg-muted:  #666666;
  --fg-subtle: #999999;
  --border:    #e5e5e5;
  --border-strong: #d4d4d8;

  /* ── Accent (functional; use sparingly) ── */
  --blue:    #0070f3;  /* primary action */
  --blue-bg: rgba(0,112,243,0.08);
  --green:   #17803d;  /* success/auto */
  --green-bg:rgba(23,128,61,0.08);
  --amber:   #c2410c;  /* warning/confirm */
  --amber-bg:rgba(194,65,12,0.08);
  --red:     #dc2626;  /* emergency/error */
  --red-bg:  rgba(220,38,38,0.08);
  --purple:  #7c3aed;  /* disclosure/brain */
  --purple-bg:rgba(124,58,237,0.08);

  /* ── Domain tint (muted, non-garish) ── */
  --agent-finance:  #0d7a7a;   /* teal */
  --agent-education:#5b4fb0;   /* indigo */
  --agent-calendar: #2563eb;   /* blue */
  --agent-home:     #c2671c;   /* warm orange */
  --agent-travel:   #17803d;   /* green */

  /* ── Typography ── */
  --font-sans: 'Geist', 'Geist Sans', -apple-system, 'SF Pro Text', 'Inter', 'Noto Sans JP', system-ui, sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', 'JetBrains Mono', ui-monospace, Menlo, monospace;

  /* Type scale (Geist-aligned) */
  --fs-xs:   11px;
  --fs-sm:   12px;
  --fs-base: 14px;
  --fs-md:   15px;
  --fs-lg:   17px;
  --fs-xl:   20px;
  --fs-2xl:  24px;
  --fs-3xl:  32px;
  --fs-4xl:  40px;

  /* Weights */
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;

  /* ── Radius (conservative) ── */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ── Shadows (subtle) ── */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 24px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);

  /* ── Spacing (8pt grid) ── */
  --sp-0: 0;
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
}

/* ═══ Base reset for UI screens ═══ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
}

/* ═══ Shared primitives (Geist-style) ═══ */

/* Pill button */
.g-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 8px 14px;
  background: var(--fg);
  color: #fff;
  border: 1px solid var(--fg);
  border-radius: var(--radius-md);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: opacity 120ms;
  text-decoration: none;
}
.g-btn:hover { opacity: 0.9; }
.g-btn--secondary {
  background: var(--bg);
  color: var(--fg);
  border-color: var(--border-strong);
}
.g-btn--ghost {
  background: transparent;
  color: var(--fg);
  border-color: transparent;
}

/* Card */
.g-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
}

/* Badge / chip */
.g-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.2px;
}
.g-badge--blue  { background: var(--blue-bg);   color: var(--blue);   border-color: transparent; }
.g-badge--green { background: var(--green-bg);  color: var(--green);  border-color: transparent; }
.g-badge--amber { background: var(--amber-bg);  color: var(--amber);  border-color: transparent; }
.g-badge--red   { background: var(--red-bg);    color: var(--red);    border-color: transparent; }
.g-badge--purple{ background: var(--purple-bg); color: var(--purple); border-color: transparent; }

/* Label (eyebrow) */
.g-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--fg-subtle);
}

/* Section title */
.g-h1 { font-size: var(--fs-3xl); font-weight: var(--fw-semibold); letter-spacing: -0.5px; color: var(--fg); }
.g-h2 { font-size: var(--fs-2xl); font-weight: var(--fw-semibold); letter-spacing: -0.3px; color: var(--fg); }
.g-h3 { font-size: var(--fs-xl);  font-weight: var(--fw-semibold); letter-spacing: -0.2px; color: var(--fg); }

/* Divider */
.g-divider {
  height: 1px;
  background: var(--border);
  margin: var(--sp-4) 0;
}

/* Avatar */
.g-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--gray-100);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  color: var(--gray-700);
  overflow: hidden;
  flex-shrink: 0;
}
.g-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* Stroke icon container (Lucide-sized; no emoji) */
.g-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke-width: 1.5;
  color: currentColor;
}

/* List row */
.g-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border);
}
.g-row:last-child { border-bottom: none; }

/* Scrollbar polish */
.g-scroll::-webkit-scrollbar { width: 6px; height: 6px; }
.g-scroll::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
.g-scroll::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }
.g-scroll::-webkit-scrollbar-track { background: transparent; }

/* Focus ring (a11y) */
*:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}