/* ============================================
   SELLO — Design tokens
   Concept: rubber-stamp ink on paper. The card
   itself is the product, so it looks handled,
   slightly imperfect, warm — never a cold SaaS
   dashboard.
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* Primitive */
  --paper-50: #FBF8F2;
  --paper-100: #F5EFE3;
  --paper-200: #E9DFCC;
  --paper-line: #D8CBAE;
  --ink-900: #201C17;
  --ink-700: #423B31;
  --ink-500: #756A5A;
  --stamp-600: #21468C;
  --stamp-700: #17335E;
  --stamp-100: #DCE4F5;
  --moss-600: #2F6B4F;
  --moss-100: #DCEBE2;
  --red-600: #B3271E;
  --white: #FFFFFF;
  --brand-yellow: #FEF4AF;
  --brand-blue: #21468C;
  --brand-yellow-bar: #F8EBA1;
  --brand-soft: #FBF3D1;

  /* Semantic */
  --color-bg: var(--paper-50);
  --color-surface: var(--white);
  --color-border: var(--paper-line);
  --color-text: var(--ink-900);
  --color-text-muted: var(--ink-500);
  --color-accent: var(--stamp-600);
  --color-accent-hover: var(--stamp-700);
  --color-accent-soft: var(--stamp-100);
  --color-detail-yellow: var(--brand-yellow);
  --color-success: var(--moss-600);
  --color-success-soft: var(--moss-100);
  --color-danger: var(--red-600);

  /* Type */
  --font-display: 'IBM Plex Serif', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Space (8px scale) */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-card: 0 1px 2px rgba(32,28,23,0.06), 0 8px 24px -8px rgba(32,28,23,0.14);
  --ease-stamp: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { box-sizing: border-box; touch-action: manipulation; }
html { -webkit-text-size-adjust: 100%; touch-action: manipulation; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.15; margin: 0; }
p { margin: 0; }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 48px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: transform 180ms var(--ease-stamp), background 180ms ease, border-color 180ms ease;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-accent);
  color: var(--white);
}
.btn-primary:hover { background: var(--color-accent-hover); }

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--space-2); text-align: left; }
.field label { font-size: 13px; font-weight: 600; color: var(--color-text-muted); }
.field input, .field select {
  min-height: 48px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
}
.field input:focus, .field select:focus { border-color: var(--color-accent); }
.field-error { font-size: 13px; color: var(--color-danger); min-height: 1em; }

.card-surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-detail-yellow);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-detail-yellow);
  color: var(--ink-700);
}

.text-link-muted {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  background: none;
  border: none;
  text-decoration: underline;
  cursor: pointer;
  display: block;
  margin: 0 auto;
}
.text-link-muted:hover { color: var(--color-accent); }

/* ============================================
   Stamp mark — the signature element.
   Two offset ink rings + a hand-set glyph,
   like a rubber stamp pressed slightly crooked.
   ============================================ */
.stamp-slot {
  position: relative;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1.5px dashed var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
}
.stamp-slot .stamp-mark {
  position: absolute;
  inset: 0;
  opacity: 0;
}
.stamp-slot.filled .stamp-mark { opacity: 1; }
.stamp-slot.filled { border-style: solid; border-color: transparent; }
.stamp-mark svg { width: 100%; height: 100%; overflow: visible; }
.stamp-mark .ring-ghost { opacity: 0.55; }
.stamp-mark .ring-ghost.ring-main { stroke: var(--color-detail-yellow); }
.stamp-mark .ring-main { fill: none; stroke: var(--color-accent); }
.stamp-mark .glyph { fill: var(--color-accent); }

.stamp-slot.empty-index { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-muted); }

/* Responsive helpers */
@media (max-width: 640px) {
  .container { padding: 0 var(--space-2); }
}