/* 研发调研报告生成器 — 设计系统对齐「每日讯息」 */

:root {
  --color-surface: #F6F4F0;
  --color-surface-elevated: #FFFFFF;
  --color-surface-accent: #F0ECE6;
  --color-text-primary: #1A1714;
  --color-text-secondary: #5C5650;
  --color-text-muted: #9A958F;
  --color-border: #E4DFD8;
  --color-border-light: #EDEAE5;
  --color-accent: #C25A42;
  --color-accent-hover: #A94A36;
  --color-success: #2D8A6E;
  --color-danger: #C0392B;
  --color-tag-red: #DC4A3A;
  --color-tag-blue: #3B7DD8;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
}

*, *::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; }

/* ===== Layout ===== */
.app-container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

/* ===== Header ===== */
.app-header {
  padding: 2.5rem 0 0;
  margin-bottom: 2rem;
}

.app-header h1 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 0.3rem;
}

.app-header p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== Steps ===== */
.steps-bar {
  display: flex;
  gap: 2px;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border-light);
  overflow-x: auto;
  scrollbar-width: none;
}

.steps-bar::-webkit-scrollbar { display: none; }

.step-badge {
  flex-shrink: 0;
  padding: 0.6rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 2.5px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  margin-bottom: -1px;
  white-space: nowrap;
  user-select: none;
}

.step-badge:hover { color: var(--color-text-secondary); }

.step-badge.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

.step-badge.completed { color: var(--color-success); }

/* ===== Card ===== */
.card {
  background: var(--color-surface-elevated);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-primary);
}

.card-title .count {
  margin-left: auto;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background: var(--color-surface-accent);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  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;
}

.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: 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;
}

.btn-danger {
  background: var(--color-surface-elevated);
  color: var(--color-danger);
  border-color: var(--color-danger);
}
.btn-danger:hover:not(:disabled) { background: #fdf2f2; }

.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

/* ===== Forms ===== */
.form-group { margin-bottom: 1rem; }

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text-primary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  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-text-muted);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.04);
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--color-text-muted); }
.form-textarea { min-height: 80px; resize: vertical; }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }

/* ===== Category Cards ===== */
.category-card {
  display: block;
  text-align: left;
  padding: 1.125rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.category-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.category-card h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.35rem;
}

.category-card p {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 0.375rem;
}

.category-card .meta {
  font-size: 0.7rem;
  color: var(--color-accent);
  font-weight: 500;
}

/* ===== Keyword Tags ===== */
.keyword-category {
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border-light);
  border-radius: 10px;
  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;
}

.keyword-category-header h4 {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.keyword-category-body { padding: 0.75rem; }

.keyword-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.78rem;
  margin: 0.2rem;
  border: 1px solid;
  line-height: 1.5;
  background: var(--color-surface);
}

.keyword-tag.high { border-color: #e8c4c4; color: #8b3a3a; }
.keyword-tag.medium { border-color: #e0d8c8; color: #6b5d42; }
.keyword-tag.low { border-color: #c4d8c8; color: #3a6b42; }

.keyword-tag .remove-btn {
  cursor: pointer;
  opacity: 0.3;
  font-size: 0.9rem;
  line-height: 1;
  margin-left: 0.125rem;
  transition: opacity var(--transition-fast);
}
.keyword-tag .remove-btn:hover { opacity: 1; color: var(--color-danger); }

.priority-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.priority-dot.high { background: var(--color-tag-red); }
.priority-dot.medium { background: #b8860b; }
.priority-dot.low { background: var(--color-success); }

/* ===== Empty State ===== */
.empty-guide {
  padding: 2.5rem 1rem;
  text-align: center;
}

.empty-guide p.hint {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.empty-guide .suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.empty-guide .suggestion-chip {
  padding: 0.3rem 0.75rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.empty-guide .suggestion-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.empty-guide .tip {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ===== Progress ===== */
.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: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

/* ===== Log ===== */
.log-area {
  background: var(--color-surface-accent);
  border: 1px solid var(--color-border-light);
  border-radius: 8px;
  padding: 1rem;
  font-family: "SF Mono", "Menlo", monospace;
  font-size: 0.78rem;
  max-height: 280px;
  overflow-y: auto;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.log-area .log-success { color: var(--color-success); }
.log-area .log-warning { color: #b8860b; }
.log-area .log-error { color: var(--color-danger); }
.log-area .log-info { color: var(--color-tag-blue); }

/* ===== Report Preview ===== */
.report-preview {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: 10px;
  padding: 2rem;
  line-height: 1.8;
  font-size: 0.9rem;
  max-height: 70vh;
  overflow-y: auto;
}

.report-preview h1 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  text-align: center;
  margin-bottom: 0.5rem;
}
.report-preview h2 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--color-border-light);
}
.report-preview h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  margin-top: 1.25rem;
  margin-bottom: 0.375rem;
  color: var(--color-text-primary);
}
.report-preview h4 {
  font-size: 0.9375rem;
  margin-top: 1rem;
  margin-bottom: 0.375rem;
  color: var(--color-text-secondary);
}
.report-preview ul { padding-left: 1.5rem; margin: 0.5rem 0; }
.report-preview li { margin-bottom: 0.25rem; }
.report-preview blockquote {
  border-left: 2px solid var(--color-border);
  padding-left: 1rem;
  margin: 0.75rem 0;
  color: var(--color-text-muted);
  font-style: italic;
}
.report-preview strong { color: var(--color-text-primary); }

/* ===== Summary Box ===== */
.summary-box {
  background: var(--color-surface-accent);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.summary-box h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  color: var(--color-text-primary);
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.375rem 1.5rem;
  font-size: 0.825rem;
  color: var(--color-text-secondary);
}
.summary-grid strong { color: var(--color-text-primary); font-weight: 600; }

/* ===== Settings ===== */
.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;
  font-family: var(--font-serif);
}
details.card summary::-webkit-details-marker { display: none; }
details.card summary::before { content: '+ '; color: var(--color-text-muted); }
details.card[open] summary::before { content: '\2212  '; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }

/* ===== Utilities ===== */
.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; } to { opacity: 1; } }
.fade-in { animation: fadeIn 0.2s ease-out; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.pulse { animation: pulse 1.5s ease-in-out infinite; }

/* ===== Footer ===== */
.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border-light);
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}