/* ── Reset & Base ─────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ── Header ──────────────────────────────────────────────────────── */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}

#header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--color-text);
}

#header nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  flex: 1;
}

#client-select,
#search-input {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  background: var(--color-surface);
  color: var(--color-text);
}

#client-select {
  min-width: 140px;
}

#search-input {
  flex: 1;
  min-width: 150px;
  max-width: 400px;
}

#user-info {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-left: auto;
  white-space: nowrap;
}

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn,
#header button,
#search-btn,
#create-btn,
#logout-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text);
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover,
#header button:hover {
  background: var(--color-bg);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary) !important;
  color: #fff !important;
  border-color: var(--color-primary) !important;
}
.btn-primary:hover {
  background: var(--color-primary-hover) !important;
}

.btn-secondary {
  background: var(--color-surface) !important;
}

.btn-danger {
  background: var(--color-danger) !important;
  color: #fff !important;
  border-color: var(--color-danger) !important;
}
.btn-danger:hover {
  background: var(--color-danger-hover) !important;
}

/* ── Main Content ────────────────────────────────────────────────── */
#main-content {
  max-width: 1200px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
}

.loading {
  text-align: center;
  color: var(--color-text-secondary);
  padding: 3rem;
}

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--color-text-secondary);
}
.empty-state h2 {
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

/* ── Entry Grid ──────────────────────────────────────────────────── */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

.entry-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: box-shadow 0.15s, border-color 0.15s;
  color: var(--color-text);
  text-decoration: none;
}
.entry-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  text-decoration: none;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-repo {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-family: monospace;
}

.entry-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.card-preview {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.card-meta {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ── Badges ──────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-review_guideline { background: #dbeafe; color: #1d4ed8; }
.badge-artifact { background: #ede9fe; color: #7c3aed; }
.badge-implementation_context { background: #fef3c7; color: #b45309; }
.badge-client_config { background: #fce7f3; color: #be185d; }
.badge-learning { background: #d1fae5; color: #059669; }

/* ── Entry Detail ────────────────────────────────────────────────── */
.entry-detail {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.entry-actions {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.entry-detail h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.meta-item {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  background: #e0e7ff;
  color: #3730a3;
}

/* ── Markdown Content ────────────────────────────────────────────── */
.entry-content {
  line-height: 1.8;
  font-size: 0.95rem;
}

.entry-content h1,
.entry-content h2,
.entry-content h3,
.entry-content h4 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.entry-content h1 { font-size: 1.5rem; }
.entry-content h2 { font-size: 1.3rem; }
.entry-content h3 { font-size: 1.15rem; }

.entry-content p {
  margin-bottom: 1rem;
}

.entry-content ul,
.entry-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.entry-content li {
  margin-bottom: 0.25rem;
}

.entry-content code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85em;
  background: #f1f5f9;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

.entry-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 1rem;
}

.entry-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.entry-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 0.5rem 1rem;
  margin-bottom: 1rem;
  background: #f0f9ff;
  color: var(--color-text-secondary);
}

.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}

.entry-content th,
.entry-content td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.entry-content th {
  background: var(--color-bg);
  font-weight: 600;
}

.entry-content mark {
  background: #fef08a;
  padding: 0.1rem 0.2rem;
  border-radius: 2px;
}

/* ── Mermaid ─────────────────────────────────────────────────────── */
.mermaid {
  display: flex;
  justify-content: center;
  overflow-x: auto;
  margin: 1.5rem 0;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

/* ── Forms ────────────────────────────────────────────────────────── */
.form-container {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-container h2 {
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group textarea {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* ── Loading Screen ──────────────────────────────────────────────── */
#loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: var(--color-text-secondary);
  gap: 1rem;
}

#loading-screen p {
  font-size: 0.9rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Login Page ─────────────────────────────────────────────────── */
#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-bg);
}

.login-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.login-brand {
  margin-bottom: 2rem;
}

.login-brand h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.login-brand p {
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.login-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  text-align: left;
}

.btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.7rem 1.25rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
}

.btn-google:hover {
  background: var(--color-bg);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.btn-google svg {
  flex-shrink: 0;
}

.login-footer {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  #header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }

  #header nav {
    width: 100%;
  }

  #search-input {
    max-width: none;
  }

  #user-info {
    margin-left: 0;
  }

  #main-content {
    padding: 0 1rem;
    margin: 1rem auto;
  }

  .entry-grid {
    grid-template-columns: 1fr;
  }

  .entry-detail {
    padding: 1.25rem;
  }

  .form-container {
    padding: 1.25rem;
  }

  .entry-actions {
    flex-wrap: wrap;
  }
}