/* Strategic Insight Report Generator — "Frost & Amber" Design System v3 */

:root {
  --color-surface: #F4F5F7;
  --color-surface-elevated: #FFFFFF;
  --color-surface-accent: #EAECF0;
  --color-text-primary: #1B1E24;
  --color-text-secondary: #5A5F6A;
  --color-text-muted: #9AA0AB;
  --color-border: #D8DCE2;
  --color-border-light: #E8EBF0;

  --color-accent: #A67C3D;
  --color-accent-hover: #8D6830;
  --color-accent-light: #FAF3E8;

  --color-success: #2D8A6E;
  --color-success-light: #E8F5F0;
  --color-danger: #C4392B;
  --color-danger-light: #FDECEA;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", Georgia, serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;

  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(27, 30, 36, 0.04);
  --shadow-md: 0 2px 8px rgba(27, 30, 36, 0.06);
  --shadow-hover: 0 6px 20px rgba(27, 30, 36, 0.08);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-family: var(--font-sans);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

body::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #D4A54A, var(--color-accent));
}

.app-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
@media (min-width: 768px) {
  .app-container { padding: 0 2rem; }
}

.app-header {
  padding: 2rem 0 1.25rem;
  margin-bottom: 0;
}
.header-rule { display: none; }
.app-header h1 {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}
.app-header p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

.wizard-nav {
  display: flex;
  gap: 0.5rem;
  padding: 1.25rem 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-light);
  overflow-x: auto;
  scrollbar-width: none;
}
.wizard-nav::-webkit-scrollbar { display: none; }

.wizard-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: var(--font-sans);
  line-height: 1.5;
}
.wizard-pill:hover { border-color: var(--color-accent); color: var(--color-text-secondary); }
.wizard-pill:active { transform: scale(0.97); }

.wizard-pill.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
}
.wizard-pill.done { border-color: var(--color-success); color: var(--color-success); }

.wizard-num {
  width: 18px; height: 18px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--color-border-light);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}
.wizard-pill.active .wizard-num { background: rgba(255,255,255,0.25); color: #fff; }
.wizard-pill.done .wizard-num { background: var(--color-success); color: #fff; }

.card {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-primary);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
}
.card-title .count {
  margin-left: auto;
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-surface-accent);
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.5;
  font-family: var(--font-sans);
}
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn:active:not(:disabled) { transform: scale(0.97); }

.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover:not(:disabled) { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn-secondary { background: var(--color-surface-elevated); color: var(--color-text-primary); border-color: var(--color-border); }
.btn-secondary:hover:not(:disabled) { border-color: #bbb; }
.btn-success { background: var(--color-success); color: #fff; border-color: var(--color-success); }
.btn-success:hover:not(:disabled) { background: #247a5e; border-color: #247a5e; }
.btn-danger { background: var(--color-surface-elevated); color: var(--color-danger); border-color: var(--color-danger); }
.btn-danger:hover:not(:disabled) { background: var(--color-danger-light); }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

.form-group { margin-bottom: 1rem; }
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text-primary);
  background: var(--color-surface-elevated);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  line-height: 1.5;
  font-family: var(--font-sans);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--color-text-muted); }
.form-textarea { min-height: 80px; resize: vertical; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.category-card {
  display: block;
  text-align: left;
  padding: 1.25rem 1.25rem 1rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}
.category-card:hover {
  border-color: var(--color-accent);
  border-top-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}
.category-card:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
.category-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}
.category-card p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin-bottom: 0.5rem;
}
.category-card .meta {
  font-size: 0.7rem;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.keyword-category {
  margin-bottom: 0.875rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.keyword-category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 1rem;
  background: var(--color-surface-accent);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}
.keyword-category-header:hover { background: var(--color-border-light); }
.keyword-category-header h4 { font-size: 0.9rem; font-weight: 600; color: var(--color-text-primary); }
.keyword-category-body { padding: 0.75rem 0.875rem; }

.keyword-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  margin: 0.2rem;
  border: 1px solid;
  line-height: 1.5;
  background: var(--color-surface-elevated);
  transition: box-shadow var(--transition-fast);
}
.keyword-tag:hover { box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.keyword-tag.high { border-color: #e0c8b0; color: #8a6530; }
.keyword-tag.medium { border-color: #d5d8dc; color: #5a5f6a; }
.keyword-tag.low { border-color: #c0d4c8; color: #3a6b42; }

.keyword-tag .remove-btn {
  cursor: pointer;
  opacity: 0.25;
  font-size: 1rem;
  line-height: 1;
  margin-left: 0.125rem;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}
.keyword-tag .remove-btn:hover { opacity: 1; color: var(--color-danger); }

.priority-dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.priority-dot.high { background: var(--color-accent); }
.priority-dot.medium { background: var(--color-text-muted); }
.priority-dot.low { background: var(--color-success); }

.empty-state { padding: 3rem 1rem 2rem; text-align: center; }
.empty-state p.hint { font-size: 1rem; color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.empty-state .suggestions { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin-bottom: 1.5rem; }
.empty-state .chip {
  padding: 0.35rem 0.85rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.empty-state .chip:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-light); }
.empty-state .tip { font-size: 0.78rem; color: var(--color-text-muted); }

.progress-bar { width: 100%; height: 3px; background: var(--color-border-light); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--color-accent); border-radius: 2px; transition: width 0.3s ease; }
.progress-text { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 0.75rem; font-style: italic; }

.log-area {
  background: #1E2028;
  border: none;
  border-radius: var(--radius-md);
  padding: 1.125rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  max-height: 280px;
  overflow-y: auto;
  line-height: 1.75;
  color: #A8AEB8;
}
.log-area .log-success { color: #5ABF9E; }
.log-area .log-warning { color: #D4A74A; }
.log-area .log-error { color: #E07A6E; }
.log-area .log-info { color: #6BA4D4; }

.report-preview {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 2.25rem 2rem;
  line-height: 1.85;
  font-size: 0.9rem;
  max-height: 70vh;
  overflow-y: auto;
  font-family: var(--font-serif);
}
.report-preview h1 { font-size: 1.45rem; text-align: center; margin-bottom: 0.75rem; color: var(--color-text-primary); letter-spacing: -0.01em; }
.report-preview h2 { font-size: 1.15rem; margin-top: 1.75rem; margin-bottom: 0.6rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--color-border-light); color: var(--color-text-primary); }
.report-preview h3 { font-size: 1rem; margin-top: 1.35rem; margin-bottom: 0.4rem; color: var(--color-text-primary); }
.report-preview h4 { font-size: 0.9375rem; margin-top: 1rem; margin-bottom: 0.4rem; color: var(--color-text-secondary); }
.report-preview ul { padding-left: 1.5rem; margin: 0.5rem 0; }
.report-preview li { margin-bottom: 0.3rem; }
.report-preview blockquote { border-left: 2px solid var(--color-accent); padding-left: 1rem; margin: 0.85rem 0; color: var(--color-text-muted); font-style: italic; }
.report-preview strong { color: var(--color-text-primary); }
.report-preview hr { border: none; border-top: 1px solid var(--color-border-light); margin: 1.25rem 0; }
.report-preview table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; font-size: 0.85rem; }
.report-preview th, .report-preview td { border: 1px solid var(--color-border); padding: 0.5rem 0.75rem; text-align: left; }
.report-preview th { background: var(--color-surface-accent); font-weight: 600; }

.summary-box {
  background: var(--color-surface-accent);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 1.125rem 1.25rem;
}
.summary-box h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--color-text-primary); }
.summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 1.5rem; font-size: 0.825rem; color: var(--color-text-secondary); }
.summary-grid strong { color: var(--color-text-primary); font-weight: 600; }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .settings-grid { grid-template-columns: 1fr; } }
details.card { cursor: default; }
details.card summary { cursor: pointer; list-style: none; }
details.card summary::-webkit-details-marker { display: none; }
details.card summary::before { content: '+ '; color: var(--color-text-muted); font-weight: 400; }
details.card[open] summary::before { content: '\2212  '; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-sm { font-size: 0.825rem; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.hidden { display: none !important; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.3s ease-out; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.pulse { animation: pulse 1.5s ease-in-out infinite; }

.site-footer {
  margin-top: 4rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}