/* EA Toolkit — design system per ea-toolkit-tool1-spec.md §6
   + portfolio-master-state.md (locked design system). */

:root {
  /* Palette */
  --paper: #F5F2EA;
  --paper-warm: #EDE8DA;
  --jade: #373C2B;
  --jade-deep: #262a1e;
  --ink: #1a1d14;
  --jasper: #DAFF00;
  --jasper-dim: #b8d600;
  --amber: #d4892b;

  /* Derived */
  --line: rgba(55, 60, 43, 0.18);
  --line-soft: rgba(55, 60, 43, 0.08);
  --muted: rgba(55, 60, 43, 0.62);

  /* Surfaces */
  --surface: #FFFFFF;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.04);

  /* Type */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter Tight', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button { font-family: inherit; }

/* Layout */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Eyebrow (shared) */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--jade);
  margin: 0;
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jade);
  display: inline-block;
}

/* Header */
.site-header {
  max-width: 880px;
  margin: 0 auto;
  padding: 28px 32px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.repo-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.repo-link:hover {
  color: var(--jade-deep);
  border-color: var(--jade);
}

/* Tabs */
.tabs {
  max-width: 880px;
  margin: 36px auto 0;
  padding: 0 32px;
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  appearance: none;
  background: transparent;
  border: none;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.tab:hover:not(:disabled) { color: var(--jade-deep); }
.tab.active {
  color: var(--jade-deep);
  border-bottom-color: var(--jade);
}
.tab:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

/* Intro */
.intro {
  padding: 64px 0 40px;
}
.intro .eyebrow { margin-bottom: 20px; }
.intro h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--jade-deep);
  margin: 0 0 24px;
}
.intro h1 em {
  font-style: italic;
  color: var(--jade);
}
.lede {
  font-size: 18px;
  line-height: 1.55;
  color: var(--jade-deep);
  max-width: 56ch;
  margin: 0;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.card + .card {
  margin-top: 24px;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--jade);
}
.helper {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  margin: 0 0 6px;
}
textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  resize: vertical;
  min-height: 120px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
textarea:focus {
  outline: none;
  border-color: var(--jade);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(55, 60, 43, 0.08);
}
textarea::placeholder { color: var(--muted); }

/* Actions */
.actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
  padding-top: 4px;
}
.btn-primary {
  appearance: none;
  background: var(--jade);
  color: var(--paper);
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s ease, transform 0.05s ease;
}
.btn-primary:hover { background: var(--jade-deep); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled {
  background: var(--muted);
  cursor: wait;
}
.btn-primary .spinner {
  display: none;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(245, 242, 234, 0.3);
  border-top-color: var(--paper);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-primary.loading .spinner { display: inline-block; }
.btn-primary.loading .btn-label::after { content: '…'; }
@keyframes spin { to { transform: rotate(360deg); } }

.privacy-note {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  margin: 0;
}

/* Output */
.output-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 24px;
}
.output-meta {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  font-style: italic;
}

/* Brief content */
.brief {
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
}
.brief h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--jade-deep);
  margin: 28px 0 10px;
}
.brief h2:first-child { margin-top: 0; }
.brief p {
  margin: 0 0 12px;
  color: var(--ink);
}
.brief ul {
  margin: 0 0 12px;
  padding-left: 20px;
}
.brief li {
  margin-bottom: 6px;
  padding-left: 4px;
}
.brief li::marker {
  color: var(--jade);
}

/* Brief states */
.loading-text {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  font-style: italic;
}
.error-text {
  font-size: 15px;
  color: #8a2c1f;
  background: #f8ece8;
  border: 1px solid #e7c5bc;
  border-radius: 8px;
  padding: 14px 16px;
  margin: 0;
  line-height: 1.55;
}

/* Footer */
.site-footer {
  max-width: 880px;
  margin: 64px auto 0;
  padding: 32px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-align: center;
}
.site-footer a {
  color: var(--jade);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.site-footer a:hover { color: var(--jade-deep); }

/* Responsive */
@media (max-width: 600px) {
  .container, .site-header, .tabs, .site-footer { padding-left: 20px; padding-right: 20px; }
  .intro { padding: 40px 0 28px; }
  .card { padding: 22px; }
  .tab { padding: 12px 14px; font-size: 11px; }
}