:root {
  --teal: #2a7a82;
  --teal-dark: #1e5b61;
  --bg: #f4f6f6;
  --card-bg: #ffffff;
  --border: #d9e0e0;
  --text: #2c3333;
  --text-muted: #6b7677;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.topbar {
  background: var(--teal);
  color: white;
  display: flex;
  align-items: center;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top));
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-logo {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: cover;
}

.topbar-title {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.topbar-title strong { font-size: 16px; }
.topbar-title span { font-size: 11px; opacity: 0.85; }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px;
  padding-bottom: 96px;
}

.intro {
  font-size: 15px;
  color: var(--text-muted);
  margin: 4px 4px 16px;
}

.cards {
  display: grid;
  gap: 14px;
}

.card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  transition: box-shadow 0.15s, transform 0.15s, border-color 0.15s;
}

.card:hover {
  box-shadow: 0 6px 16px rgba(42,122,130,0.18);
  transform: translateY(-2px);
}

.card:active { transform: translateY(0); }

.card-icon {
  font-size: 30px;
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eef7f7;
  border-radius: 10px;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--teal-dark);
}

.card-desc {
  font-size: 14px;
  color: var(--text-muted);
}

.card-links {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.card-open {
  font-size: 14px;
  font-weight: 600;
  color: var(--teal);
}

.card-sub {
  font-size: 13px;
  color: var(--teal-dark);
  background: #eef7f7;
  padding: 4px 10px;
  border-radius: 12px;
  cursor: pointer;
}

.card-sub:hover { background: #ddeeee; }

.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid var(--border);
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  gap: 10px;
}

.app-footer button {
  background: var(--teal);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}