*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --surface2: #0f3460;
  --accent: #e94560;
  --accent2: #533483;
  --text: #eaeaea;
  --text-muted: #8892a4;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.5;
}

/* ---- Layout ---- */
#app { display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: var(--surface);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar h1 { font-size: 1.3rem; font-weight: 700; color: var(--accent); }

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

.main { flex: 1; padding: 20px; max-width: 600px; width: 100%; margin: 0 auto; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.card h2 { font-size: 1.1rem; margin-bottom: 16px; color: var(--text); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--surface2); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }
.btn-full { width: 100%; }

/* ---- Inputs ---- */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 0.9rem; color: var(--text-muted); }

input, select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1.5px solid var(--surface2);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, select:focus { border-color: var(--accent); }

/* ---- Member-Toggle-Chips ---- */
.member-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }

.chip {
  padding: 8px 14px;
  border-radius: 20px;
  background: var(--surface2);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  border: 2px solid transparent;
  transition: all 0.15s;
  user-select: none;
}
.chip.active { background: var(--accent2); color: var(--text); border-color: var(--accent); }

/* ---- Ausgaben-Liste ---- */
.expense-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--surface2);
}
.expense-item:last-child { border-bottom: none; }
.expense-desc { font-weight: 600; }
.expense-meta { font-size: 0.82rem; color: var(--text-muted); margin-top: 3px; }
.expense-amount { font-size: 1.1rem; font-weight: 700; color: var(--accent); white-space: nowrap; }
.expense-pending { opacity: 0.5; }
.pending-badge {
  font-size: 0.72rem;
  background: var(--warning);
  color: #000;
  padding: 2px 7px;
  border-radius: 10px;
  margin-left: 6px;
}

/* ---- Saldo-Karten ---- */
.balance-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--surface2);
}
.balance-row:last-child { border-bottom: none; }
.balance-pos { color: var(--success); font-weight: 700; }
.balance-neg { color: var(--danger); font-weight: 700; }
.balance-zero { color: var(--text-muted); }

.settle-item {
  padding: 10px 14px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.settle-arrow { color: var(--accent); margin: 0 6px; }

/* ---- Tabs ---- */
.tabs { display: flex; gap: 4px; margin-bottom: 20px; }
.tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  border-radius: 8px;
  cursor: pointer;
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  transition: all 0.15s;
}
.tab.active { background: var(--accent); color: #fff; }

/* ---- Login ---- */
#login-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
#login-screen .card { width: 100%; max-width: 400px; }
#login-screen h1 { font-size: 2rem; color: var(--accent); margin-bottom: 8px; text-align: center; }
#login-screen p { color: var(--text-muted); text-align: center; margin-bottom: 24px; }

/* ---- Passwort-Änderung ---- */
#pw-change-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
#pw-change-screen .card { width: 100%; max-width: 400px; }

/* ---- Admin-Panel ---- */
.admin-section { margin-bottom: 24px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.admin-table th { text-align: left; color: var(--text-muted); padding: 8px 0; border-bottom: 1px solid var(--surface2); }
.admin-table td { padding: 10px 0; border-bottom: 1px solid var(--surface2); }
.admin-table tr:last-child td { border-bottom: none; }

/* ---- Gruppen-Auswahl ---- */
.group-list { display: flex; flex-direction: column; gap: 10px; }
.group-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px 20px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.15s;
}
.group-card:hover { border-color: var(--accent); }
.group-card h3 { font-size: 1rem; }
.group-card p { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ---- Toast ---- */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--surface2);
  color: var(--text);
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
  z-index: 999;
  white-space: nowrap;
}
#toast.show { transform: translateX(-50%) translateY(0); }
#toast.error { background: var(--danger); }
#toast.success { background: var(--success); color: #000; }

/* ---- Shares-Eingabe ---- */
.share-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.share-row label { flex: 1; font-size: 0.9rem; }
.share-row input { width: 100px; flex: none; }

@media (max-width: 480px) {
  .main { padding: 12px; }
  .topbar { padding: 12px 16px; }
}