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

:root {
  --bg:          #0d0f12;
  --surface:     #161a1f;
  --surface-2:   #1e242c;
  --border:      #252c36;
  --accent:      #4f8ef7;
  --accent-dim:  #2a4a8a;
  --green:       #34d399;
  --yellow:      #fbbf24;
  --red:         #f87171;
  --text:        #e2e8f0;
  --text-dim:    #64748b;
  --text-muted:  #3f4d5e;
  --radius:      14px;
  --radius-sm:   8px;
  --shadow:      0 4px 24px rgba(0,0,0,.45);
  --transition:  .18s ease;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,15,18,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  max-width: 900px;
  margin: 0 auto;
}

.app-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -.3px;
  color: var(--text);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Period select ── */
.period-select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: .82rem;
  font-weight: 600;
  font-family: inherit;
  padding: 7px 30px 7px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  appearance: none;
  -webkit-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='%2364748b' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition);
  color-scheme: dark;
}

.period-select:focus {
  outline: none;
  border-color: var(--accent);
}

.period-select option, .period-select optgroup {
  background: var(--surface-2);
  color: var(--text);
}

/* ── Refresh button ── */
.refresh-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}

.refresh-btn:hover { color: var(--text); border-color: var(--accent); }
.refresh-btn.spinning svg { animation: spin .7s linear infinite; }

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

/* ── Status bar ── */
.status-bar {
  margin: 12px 16px 0;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-bar.hidden { display: none; }
.status-bar.error   { background: rgba(248,113,113,.12); color: var(--red);   border: 1px solid rgba(248,113,113,.25); }
.status-bar.info    { background: rgba(79,142,247,.1);   color: var(--accent); border: 1px solid rgba(79,142,247,.2); }
.status-bar.success { background: rgba(52,211,153,.1);   color: var(--green);  border: 1px solid rgba(52,211,153,.2); }

/* ── Main grid ── */
.main {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 16px 32px;
}

.stores-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media (min-width: 640px) {
  .stores-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 880px) {
  .stores-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Store card ── */
.store-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.store-card:hover { border-color: var(--accent-dim); }

.store-card.loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(13,15,18,.6);
  border-radius: var(--radius);
  z-index: 2;
}

.store-card.error-state { border-color: rgba(248,113,113,.3); }

/* Card header */
.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.store-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.store-url {
  font-size: .72rem;
  color: var(--text-muted);
  margin-top: 3px;
  word-break: break-all;
}

.card-badge {
  font-size: .65rem;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 20px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.card-badge.cached {
  background: rgba(100,116,139,.15);
  color: var(--text-dim);
  border: 1px solid rgba(100,116,139,.2);
}

.card-badge.live {
  background: rgba(52,211,153,.12);
  color: var(--green);
  border: 1px solid rgba(52,211,153,.2);
}

/* Metrics grid */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.metric-label {
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
  letter-spacing: -1px;
}

.metric-value.highlight { color: var(--green); }
.metric-value.dim       { color: var(--yellow); }

.metric-sub {
  font-size: .72rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Error in card */
.card-error {
  font-size: .82rem;
  color: var(--red);
  background: rgba(248,113,113,.08);
  border: 1px solid rgba(248,113,113,.2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

/* Card footer */
.card-footer {
  font-size: .72rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 6px;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-value { height: 2rem; width: 70%; margin-bottom: 4px; }
.skeleton-label { height: .7rem; width: 50%; }

/* ── Loading overlay (initial) ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-dim);
  font-size: .9rem;
  transition: opacity .3s;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

/* ── Custom date range bar ── */
.custom-range-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.custom-range-bar.hidden { display: none; }

.range-label {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}

.date-input {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: .85rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--transition);
  color-scheme: dark;
}

.date-input:focus {
  outline: none;
  border-color: var(--accent);
}

.range-sep {
  color: var(--text-muted);
  margin-top: 14px;
  font-size: 1rem;
}

.range-apply-btn {
  margin-top: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition);
}

.range-apply-btn:hover { opacity: .85; }
.range-apply-btn:active { opacity: .7; }

/* ── Next refresh countdown ── */
.next-refresh {
  font-size: .72rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 8px;
}

/* ── GA4 section ── */
.ga4-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.ga4-title {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.ga4-note {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
}

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