/* Gmail Sorter – Dark modern mobile-first UI */

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --success: #22c55e;
  --warning: #f59e0b;
  --border: rgba(148, 163, 184, 0.12);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 100px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-width: 320px;
  padding-bottom: env(safe-area-inset-bottom, 2rem);
  -webkit-font-smoothing: antialiased;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  padding-top: calc(env(safe-area-inset-top, 0px) + 12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.logo-icon { color: var(--accent); }
header h1 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 16px var(--accent-glow);
}
.btn-accent:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn-accent:disabled { opacity: 0.35; cursor: default; box-shadow: none; }
.btn-ghost {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); }
.btn-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.btn-circle:hover { background: var(--surface-hover); color: var(--text); }

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: rgba(255,255,255,0.2);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0 5px;
}

/* Status bar */
.status-bar {
  padding: 10px 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: none;
  letter-spacing: 0.01em;
}
.status-bar.visible { display: block; }

/* Settings */
.settings-panel {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 16px;
}
.settings-panel.open {
  max-height: 200px;
  padding: 16px;
}
.settings-panel.collapsed { max-height: 0; padding: 0 16px; }
.settings-content {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}
.settings-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 140px;
}
.settings-field label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.settings-field input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
}
.settings-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Cards */
main {
  padding: 12px;
  max-width: 640px;
  margin: 0 auto;
}

.sender-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 18px;
  margin-bottom: 10px;
  transition: all 0.25s ease;
  position: relative;
}
.sender-card:hover {
  border-color: rgba(148, 163, 184, 0.2);
}
.sender-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}
.sender-card.selected::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius) var(--radius) 0 0;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.sender-name {
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: -0.01em;
}
.mail-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 5px;
}
.badge-recurring {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
}

.sender-email {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
}
.sender-summary {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  line-height: 1.5;
  padding: 8px 12px;
  background: rgba(99, 102, 241, 0.06);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}
.recent-subjects {
  font-size: 0.73rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.4;
}

/* Label buttons */
.label-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.label-btn {
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 0.73rem;
  font-weight: 500;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.label-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.25);
}
.label-btn:active { transform: scale(0.96); }
.label-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.label-btn.suggested {
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--accent-hover);
}
.label-btn.suggested::after {
  content: ' \2605';
  color: var(--warning);
  font-size: 0.65rem;
}
.label-btn.active.suggested::after { color: rgba(255,255,255,0.7); }
.label-btn.auto-delete {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.3);
}
.label-btn.auto-delete:hover {
  background: var(--danger-bg);
  border-color: rgba(239, 68, 68, 0.5);
}
.label-btn.auto-delete.active {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.25);
}
.label-btn.keep-inbox {
  color: var(--text-muted);
  border-color: rgba(100, 116, 139, 0.3);
}
.label-btn.keep-inbox:hover {
  background: rgba(100, 116, 139, 0.1);
}
.label-btn.keep-inbox.active {
  background: var(--text-muted);
  color: var(--bg);
  border-color: var(--text-muted);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}
.empty-state svg {
  color: var(--success);
  opacity: 0.5;
  margin-bottom: 16px;
}
.empty-state p {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.empty-state .hint {
  font-size: 0.82rem;
  margin-top: 6px;
  font-weight: 400;
  color: var(--text-muted);
}

/* Pull to refresh */
.ptr-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 12px;
  transition: opacity 0.2s;
  opacity: 0;
}
.ptr-indicator.visible { opacity: 1; }
.ptr-indicator.refreshing { color: var(--accent); }
.ptr-indicator.refreshing svg { animation: spin 0.8s linear infinite; }

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

/* Loading */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

/* Responsive */
@media (min-width: 480px) {
  main { padding: 16px; }
  .sender-card { padding: 22px; }
}

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