/* ColdToClose App — Design System */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-hover: #18182a;
  --border: #1e1e2e;
  --border-focus: #2e2e4e;
  --text: #e8e8ed;
  --text-muted: #8888a0;
  --text-dim: #5a5a70;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-glow: rgba(245, 158, 11, 0.15);
  --cold: #3b82f6;
  --warm: #f59e0b;
  --hot: #ef4444;
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, 0.15);
  --red-dim: rgba(239, 68, 68, 0.15);
  --blue-dim: rgba(59, 130, 246, 0.15);
  --amber-dim: rgba(245, 158, 11, 0.15);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 150ms ease;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* LAYOUT */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 50;
}

.sidebar-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  padding: 0 1.5rem;
  margin-bottom: 2rem;
  color: var(--text);
}
.sidebar-logo span { color: var(--accent); }
.sidebar-logo small {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 0.75rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
}
.sidebar-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.sidebar-link.active {
  color: var(--accent);
  background: var(--accent-glow);
}
.sidebar-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.sidebar-footer a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sidebar-footer a:hover { color: var(--text-muted); }

/* MAIN CONTENT */
.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 2rem;
  max-width: 1200px;
}

/* PAGE HEADER */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}
.page-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.page-header p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* STAT CARDS */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.stat-card .stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}
.stat-card.blue .stat-value { color: var(--cold); }
.stat-card.green .stat-value { color: var(--green); }
.stat-card.red .stat-value { color: var(--hot); }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  line-height: 1;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--border-focus);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 0.5rem 0.75rem;
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.btn-danger {
  background: transparent;
  color: var(--hot);
  border-color: rgba(239, 68, 68, 0.3);
}
.btn-danger:hover:not(:disabled) {
  background: var(--red-dim);
}
.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
}
.btn-icon {
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

/* FORMS */
.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.875rem;
  font-family: 'Inter', sans-serif;
  transition: border-color var(--transition);
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dim);
}
.form-textarea {
  min-height: 100px;
  resize: vertical;
}
.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

/* TAGS INPUT */
.tags-input {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.4rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 42px;
  align-items: center;
  cursor: text;
}
.tags-input:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.tags-input .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.5rem;
  background: var(--accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 4px;
  font-size: 0.78rem;
  color: var(--accent);
}
.tags-input .tag button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  padding: 0;
  opacity: 0.6;
}
.tags-input .tag button:hover { opacity: 1; }
.tags-input input {
  flex: 1;
  min-width: 100px;
  border: none;
  background: none;
  color: var(--text);
  font-size: 0.85rem;
  padding: 0.25rem;
  outline: none;
}
.tags-input input::placeholder { color: var(--text-dim); }

/* TABLES */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
table {
  width: 100%;
  border-collapse: collapse;
}
thead th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.01);
}
tbody td {
  padding: 0.85rem 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover {
  background: rgba(255, 255, 255, 0.015);
}
tbody tr.clickable {
  cursor: pointer;
}

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-pending {
  background: rgba(136, 136, 160, 0.12);
  color: var(--text-muted);
}
.badge-researching {
  background: var(--blue-dim);
  color: var(--cold);
}
.badge-completed {
  background: var(--green-dim);
  color: var(--green);
}
.badge-failed {
  background: var(--red-dim);
  color: var(--hot);
}
.badge-draft {
  background: var(--amber-dim);
  color: var(--warm);
}
.badge-approved {
  background: var(--green-dim);
  color: var(--green);
}

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
}
.card + .card { margin-top: 1rem; }

/* RESEARCH PANEL */
.research-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.research-section {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.research-section h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.65rem;
}
.research-section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.research-section li {
  font-size: 0.84rem;
  color: var(--text-muted);
  padding-left: 1.1rem;
  position: relative;
  line-height: 1.5;
}
.research-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}
.research-section p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* EMAIL PREVIEW */
.email-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.email-preview-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
}
.email-preview-header .subject {
  font-weight: 600;
  font-size: 0.95rem;
}
.email-preview-header .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}
.email-preview-body {
  padding: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
}

/* MODALS */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(4px);
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 90%;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
}
.modal h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* EMPTY STATES */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}
.empty-state h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.empty-state p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* LOADING */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-bar {
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.loading-bar::after {
  content: '';
  position: absolute;
  left: -40%;
  width: 40%;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  animation: loading-slide 1s ease infinite;
}
@keyframes loading-slide {
  0% { left: -40%; }
  100% { left: 100%; }
}

/* TOAST */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  padding: 0.85rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  animation: toast-in 0.2s ease;
  max-width: 380px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.toast.success { border-color: var(--green); color: var(--green); }
.toast.error { border-color: var(--hot); color: var(--hot); }
.toast.info { border-color: var(--cold); color: var(--cold); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* UTILITY */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.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; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.84rem; }
.hidden { display: none !important; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .research-panel { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}