/* ==========================================================================
   Sultan Rewards — App shell
   ========================================================================== */

* , *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font: inherit; }

html, body {
  height: 100%;
  overscroll-behavior-y: none;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-cream);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-brown-deep);
  font-weight: 700;
  line-height: 1.2;
}

#app {
  max-width: var(--container-w);
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-cream);
  position: relative;
}

/* ---- Top bar ---- */
.top-bar {
  height: calc(var(--top-bar-h) + var(--safe-top));
  padding-top: var(--safe-top);
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--color-brown-deep);
  color: var(--color-cream-text);
  box-shadow: var(--shadow-soft);
}
.top-bar h1 {
  font-size: 1.15rem;
  color: var(--color-cream-text);
  letter-spacing: 0.02em;
}
.top-bar .top-bar-action {
  position: absolute;
  right: 1rem;
  top: calc(var(--safe-top) + 50%);
  transform: translateY(-50%);
  color: var(--color-gold-light);
  font-size: 0.85rem;
}
.top-bar .top-bar-back {
  position: absolute;
  left: 0.6rem;
  top: calc(var(--safe-top) + 50%);
  transform: translateY(-50%);
  color: var(--color-cream-text);
  padding: 0.5rem;
}

/* ---- Main scroll area ---- */
main.view {
  flex: 1;
  padding: 1.25rem 1rem calc(var(--tab-bar-h) + var(--safe-bottom) + 2rem);
  overflow-y: auto;
}

/* ---- Bottom tab bar ---- */
.tab-bar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 100%;
  max-width: var(--container-w);
  height: calc(var(--tab-bar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  display: flex;
  background: var(--color-paper);
  border-top: 1px solid var(--color-border);
  z-index: 30;
}
.tab-bar a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
}
.tab-bar a svg { width: 22px; height: 22px; }
.tab-bar a.active { color: var(--color-gold); }
.tab-bar a.active svg { color: var(--color-gold); }

/* ---- Cards ---- */
.card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 1.25rem;
}
.card + .card { margin-top: 1rem; }

/* ---- Points / tier hero ---- */
.points-hero {
  background: linear-gradient(135deg, var(--color-brown-deep), var(--color-brown));
  color: var(--color-cream-text);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-deep);
}
.points-hero .points-value {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1;
}
.points-hero .points-label {
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-cream-text);
  opacity: 0.75;
  margin-top: 0.5rem;
}

.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 1rem;
}
.tier-badge.tier-bronze { background: rgba(169, 116, 79, 0.2); color: var(--color-tier-bronze); }
.tier-badge.tier-silver { background: rgba(154, 161, 168, 0.2); color: var(--color-tier-silver); }
.tier-badge.tier-gold { background: rgba(212, 175, 55, 0.22); color: var(--color-tier-gold); }

.progress-track {
  height: 8px;
  border-radius: 999px;
  background: rgba(247, 239, 224, 0.15);
  overflow: hidden;
  margin-top: 1rem;
}
.progress-track .progress-fill {
  height: 100%;
  background: var(--color-gold-light);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.progress-note {
  font-size: 0.78rem;
  color: var(--color-cream-text);
  opacity: 0.75;
  margin-top: 0.6rem;
}

/* ---- Reward list ---- */
.reward-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}
.reward-card h4 { font-size: 1.02rem; }
.reward-card p { color: var(--color-text-muted); font-size: 0.88rem; margin-top: 0.2rem; }
.reward-cost {
  flex-shrink: 0;
  text-align: center;
  min-width: 64px;
}
.reward-cost .n { font-family: var(--font-display); font-size: 1.3rem; color: var(--color-gold); font-weight: 700; }
.reward-cost .u { display: block; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-muted); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--color-brown-deep); color: var(--color-cream-text); }
.btn-gold { background: var(--color-gold); color: var(--color-brown-deep); }
.btn-outline { background: transparent; border: 1px solid var(--color-brown-deep); color: var(--color-brown-deep); }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.45; pointer-events: none; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.82rem; }

/* ---- Forms ---- */
.field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
.field label { font-size: 0.82rem; color: var(--color-text-muted); }
.field input, .field select, .field textarea {
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-text);
  font-family: inherit;
}
.field textarea { resize: vertical; min-height: 90px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--color-gold-light); outline-offset: 1px; }

.form-error {
  background: rgba(160, 43, 58, 0.1);
  color: var(--color-red-deep);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.form-success {
  background: rgba(184, 134, 63, 0.12);
  color: var(--color-brown-deep);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

/* ---- Member card ---- */
.member-card {
  background: linear-gradient(135deg, var(--color-brown-deep), var(--color-ink));
  color: var(--color-cream-text);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-deep);
  text-align: center;
}
.member-card .qr-wrap {
  background: var(--color-paper);
  border-radius: var(--radius);
  padding: 1rem;
  display: inline-block;
  margin: 1rem 0;
}
.member-card .member-code {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.1em;
  color: var(--color-gold-light);
}
.member-card .member-name { font-size: 0.95rem; opacity: 0.85; margin-top: 0.3rem; }

/* ---- History / inbox feed ---- */
.feed-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--color-border);
}
.feed-item:last-child { border-bottom: none; }
.feed-item .feed-title { font-size: 0.92rem; font-weight: 500; }
.feed-item .feed-meta { font-size: 0.78rem; color: var(--color-text-muted); margin-top: 0.15rem; }
.feed-item .feed-amount { font-family: var(--font-display); font-weight: 700; font-size: 1rem; white-space: nowrap; }
.feed-amount.positive { color: var(--color-gold); }
.feed-amount.negative { color: var(--color-red); }

/* ---- Misc ---- */
.center { text-align: center; }
.muted { color: var(--color-text-muted); font-size: 0.88rem; }
.section-title {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 500;
  margin: 1.5rem 0 0.75rem;
}
.section-title:first-child { margin-top: 0; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--color-text-muted); }

.auth-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 1.5rem;
  max-width: var(--container-w);
  margin: 0 auto;
}
.auth-screen .brand-mark { text-align: center; margin-bottom: 2rem; }
.auth-screen .brand-mark img { width: 96px; margin: 0 auto; }
.auth-screen .switch-link { text-align: center; margin-top: 1.25rem; font-size: 0.88rem; color: var(--color-text-muted); }
.auth-screen .switch-link a { color: var(--color-gold); font-weight: 500; }

.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.install-banner {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(var(--tab-bar-h) + var(--safe-bottom) + 0.6rem);
  width: calc(100% - 1.6rem);
  max-width: calc(var(--container-w) - 1.6rem);
  background: var(--color-brown-deep);
  color: var(--color-cream-text);
  border-radius: var(--radius-lg);
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-deep);
  z-index: 40;
}
.install-banner p { font-size: 0.82rem; color: var(--color-cream-text); flex: 1; }
.install-banner button.dismiss { color: var(--color-gold-light); font-size: 1.1rem; padding: 0.2rem 0.4rem; }

/* ---- Reservations booking ---- */
.slot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 0.5rem;
}
.slot-btn {
  padding: 0.55rem 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-paper);
  color: var(--color-text);
  font-size: 0.82rem;
  font-weight: 500;
}
.slot-btn.is-selected { background: var(--color-brown-deep); border-color: var(--color-brown-deep); color: var(--color-gold-light); }
.slot-btn:disabled { opacity: 0.4; }
.slot-full { display: block; font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 0.1rem; }

@media (prefers-color-scheme: dark) {
  body { background: #1a120b; }
  #app { background: #1a120b; }
  .card, .field input, .field select, .field textarea, .slot-btn, .member-card .qr-wrap { background: #241810; color: var(--color-cream-text); }
  .tab-bar { background: #241810; border-top-color: rgba(247,239,224,0.1); }
  .tab-bar a { color: rgba(247,239,224,0.55); }
  h1, h2, h3, h4 { color: var(--color-cream-text); }
  p { color: rgba(247,239,224,0.65); }
  .field label { color: rgba(247,239,224,0.6); }
}