:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --border: #e2e2e5;
  --accent: #2563eb;
  --danger: #dc2626;
  --success: #16a34a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --card-bg: #1e1f26;
    --text: #f0f0f2;
    --muted: #9aa0ab;
    --border: #2c2d35;
  }
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--card-bg);
  flex-wrap: wrap;
}

.topbar .brand {
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  font-size: 1.1rem;
}

.topbar nav { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.topbar nav a { color: var(--text); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }
.topbar .who { margin-left: auto; font-size: 0.9rem; color: var(--muted); }
.topbar .who a { color: var(--muted); }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card.narrow { max-width: 420px; margin: 2rem auto; }

h1, h2, h3 { margin-top: 0; }

.stack { display: flex; flex-direction: column; gap: 0.9rem; }
.row { display: flex; gap: 0.9rem; flex-wrap: wrap; align-items: flex-end; }
.row > label { flex: 1; min-width: 140px; }

label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--muted); }

input, select, button {
  font-size: 1rem;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
}

button, .btn-secondary {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

.btn-secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.link-btn {
  background: none;
  border: none;
  color: var(--danger);
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  font-size: 0.85rem;
}

fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem; }
legend { color: var(--muted); font-size: 0.85rem; padding: 0 0.3rem; }

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.5rem;
}

.member-choice {
  flex-direction: row;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem;
  cursor: pointer;
}

.hint { color: var(--muted); font-size: 0.85rem; }
.muted { color: var(--muted); font-size: 0.85rem; margin-left: 0.4rem; }

.activity-list, .suggestion-list, .admin-member-list { list-style: none; padding: 0; margin: 0; }

.activity-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.activity-row:last-child { border-bottom: none; }
.amount { font-weight: 600; }
.row-actions { display: flex; gap: 0.6rem; font-size: 0.85rem; }
.row-actions form { display: inline; }

.balances-table { width: 100%; border-collapse: collapse; }
.balances-table td, .balances-table th { padding: 0.5rem 0.3rem; border-bottom: 1px solid var(--border); text-align: left; }
.balances-table tr.positive td:last-child { color: var(--success); }
.balances-table tr.negative td:last-child { color: var(--danger); }

.suggestion-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.5rem 0; border-bottom: 1px solid var(--border); gap: 0.5rem; flex-wrap: wrap;
}
.suggestion-list li:last-child { border-bottom: none; }

.admin-member-list li { display: flex; align-items: center; gap: 0.6rem; padding: 0.4rem 0; flex-wrap: wrap; }
.inline { display: inline-flex; gap: 0.4rem; align-items: center; }

.badge { font-size: 0.7rem; background: var(--border); border-radius: 6px; padding: 0.1rem 0.4rem; color: var(--muted); }
.badge.active { color: var(--success); }
.badge.inactive { color: var(--danger); }

.flash { padding: 0.6rem 0.9rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; }
.flash-success { background: #16a34a22; color: var(--success); }
.flash-error { background: #dc262622; color: var(--danger); }
.flash-info { background: #2563eb22; color: var(--accent); }