:root {
  --bg: #0A192F;
  --fg: #FFFFFF;
  --opacity-hover: 0.7;
  --opacity-active: 0.15;
  --border: 1px solid rgba(255, 255, 255, 0.2);
  --scroll-pad: 80px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--scroll-pad); }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Fixed Header */
header#top-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-scroll {
  flex: 1;
  display: flex;
  overflow-x: auto;
  gap: 6px;
  scrollbar-width: none;
}
.nav-scroll::-webkit-scrollbar { display: none; }

.nav-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--fg);
  padding: 6px 10px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s, background 0.2s;
}
.nav-btn:hover { opacity: var(--opacity-hover); }
.nav-btn.active { background: var(--opacity-active); border-color: var(--fg); }

.future-btn {
  border: 1px solid var(--fg);
  color: var(--fg);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  transition: opacity 0.2s;
}
.future-btn:hover { opacity: var(--opacity-hover); }

/* Main Content */
main#cards-container {
  flex: 1;
  padding: 100px 20px 120px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.city-card {
  border: var(--border);
  padding: 20px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  transition: background 0.2s;
}
.city-card:hover { background: rgba(255, 255, 255, 0.06); }

.city-name { font-size: 1.4rem; font-weight: 600; margin-bottom: 4px; }
.city-region { font-size: 0.85rem; opacity: 0.8; margin-bottom: 16px; }

.countdown {
  font-size: 1.1rem;
  margin-bottom: 12px;
  padding: 8px 0;
  border-top: var(--border);
  border-bottom: var(--border);
}
.countdown-label { font-size: 0.85rem; opacity: 0.7; display: block; margin-bottom: 4px; }
.countdown-time { font-family: monospace; font-size: 1.3rem; letter-spacing: 1px; }

.prayer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin: 12px 0;
}
.prayer-item { text-align: center; font-size: 0.85rem; }
.prayer-name { opacity: 0.7; display: block; margin-bottom: 2px; }
.prayer-time { font-weight: 500; }

.meta { font-size: 0.75rem; opacity: 0.6; margin-top: 8px; }

/* Fixed Footer */
footer#trust-footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(8px);
  border-top: var(--border);
  padding: 10px 16px;
  text-align: center;
  font-size: 0.75rem;
  line-height: 1.6;
  opacity: 0.85;
}
footer p { margin: 0; }

@media (max-width: 600px) {
  main#cards-container { grid-template-columns: 1fr; padding-top: 90px; padding-bottom: 110px; }
  .future-btn { font-size: 12px; padding: 5px 8px; }
}