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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #222536;
  --border: #2e3248;
  --accent: #6c6ef7;
  --accent-hover: #5a5ce6;
  --green: #22c55e;
  --red: #ef4444;
  --text: #e2e8f0;
  --muted: #8892a4;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

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

/* ---- Layout ---- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header h1 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.app-header h1 span { color: var(--accent); }

.container { max-width: 1100px; margin: 0 auto; padding: 2rem; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover:not(:disabled) { background: var(--surface2); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #dc2626; }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.8rem; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

/* ---- Tracker grid ---- */
.tracker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.tracker-card { position: relative; }
.tracker-card .tracker-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; }
.tracker-card .tracker-name { font-weight: 700; font-size: 1rem; }
.tracker-card .tracker-url { font-size: 0.78rem; color: var(--muted); margin-top: 0.25rem; word-break: break-all; }
.tracker-card .tracker-meta { display: flex; gap: 1rem; margin-top: 0.75rem; flex-wrap: wrap; }
.tracker-card .meta-item { font-size: 0.8rem; color: var(--muted); }
.tracker-card .meta-item strong { color: var(--text); }
.tracker-card .tracker-actions { display: flex; gap: 0.5rem; margin-top: 1rem; flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.badge-green { background: #14532d; color: #4ade80; }
.badge-red   { background: #450a0a; color: #fca5a5; }
.badge-muted { background: var(--surface2); color: var(--muted); }

/* ---- Toggle ---- */
.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 22px;
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: "";
  position: absolute;
  left: 3px; top: 3px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(18px); }

/* ---- Alerts feed ---- */
.alerts-section { margin-top: 2.5rem; }
.alerts-section h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; }

.alert-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.alert-table th {
  text-align: left;
  padding: 0.6rem 0.75rem;
  color: var(--muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.alert-table td {
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.alert-table tr:hover td { background: var(--surface2); }
.discount-badge {
  font-weight: 700;
  color: var(--green);
}

/* ---- Empty state ---- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}
.empty-state p { margin-top: 0.5rem; font-size: 0.9rem; }

/* ---- Modal ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  width: min(560px, 95vw);
  max-height: 90vh;
  overflow-y: auto;
}
.modal h2 { font-size: 1.15rem; font-weight: 700; margin-bottom: 1.25rem; }
.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; margin-top: 1.5rem; }

/* ---- Forms ---- */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--muted); margin-bottom: 0.35rem; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  font-family: var(--font);
  transition: border-color 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 90px; }

/* ---- Preview card ---- */
.preview-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  font-size: 0.875rem;
}
.preview-card .preview-row { display: flex; gap: 0.5rem; margin-bottom: 0.4rem; }
.preview-card .preview-label { color: var(--muted); min-width: 110px; }
.preview-card .preview-value { color: var(--text); font-weight: 600; word-break: break-all; }

/* ---- Setup page ---- */
.setup-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.setup-card {
  width: min(560px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 2.25rem;
}
.setup-card h1 { font-size: 1.4rem; font-weight: 800; margin-bottom: 0.25rem; }
.setup-card .subtitle { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.75rem; }

.step-indicator { display: flex; gap: 0.5rem; margin-bottom: 2rem; }
.step-dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--surface2);
  border: 2px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.step-dot.active { border-color: var(--accent); color: var(--accent); }
.step-dot.done { background: var(--accent); border-color: var(--accent); color: #fff; }
.step-line { flex: 1; height: 2px; background: var(--border); align-self: center; }

.step-panel { display: none; }
.step-panel.active { display: block; }

.notifier-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.notifier-row:last-child { border-bottom: none; }
.notifier-row label { flex: 1; font-size: 0.9rem; }

.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  z-index: 999;
  transform: translateY(0);
  transition: opacity 0.3s, transform 0.3s;
}
.toast.hidden { opacity: 0; transform: translateY(1rem); pointer-events: none; }
.toast.success { border-color: var(--green); }
.toast.error { border-color: var(--red); }

@media (max-width: 600px) {
  .container { padding: 1rem; }
  .app-header { padding: 0.75rem 1rem; }
  .tracker-grid { grid-template-columns: 1fr; }
  .alert-table { font-size: 0.8rem; }
}