/* ============================================================
   THW Kasse — Liquid Glass Design System
   ============================================================ */

/* --- Reset ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; overscroll-behavior: none; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
  min-height: 100dvh;
  overflow: hidden;
  position: fixed;
  inset: 0;
  -webkit-font-smoothing: antialiased;
  color: var(--text-primary);
}
button, input, select { font-family: inherit; font-size: inherit; }

/* --- Tokens ----------------------------------------------- */
:root {
  --bg-base: #f2f4f8;
  --text-primary: #0d1117;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --accent: #0066ff;
  --accent-light: rgba(0,102,255,0.12);
  --accent-glow: rgba(0,102,255,0.35);
  --success: #16a34a;
  --success-light: rgba(22, 163, 74, 0.12);
  --danger: #dc2626;
  --danger-light: rgba(220, 38, 38, 0.12);
  --warning: #d97706;
  --glass-bg: rgba(255,255,255,0.55);
  --glass-border: rgba(255,255,255,0.45);
  --glass-shadow: rgba(0,0,0,0.06);
  --glass-blur: blur(20px);
  --card-bg: #ffffff;
  --radius-sm: 12px; --radius-md: 18px; --radius-lg: 24px; --radius-xl: 32px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --tab-bar-h: 68px;
  --ease: cubic-bezier(0.22,1,0.36,1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-base: #0a0e1a;
    --text-primary: #edf0f7;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --glass-bg: rgba(15,22,40,0.6);
    --glass-border: rgba(255,255,255,0.08);
    --glass-shadow: rgba(0,0,0,0.25);
    --accent: #3b82f6;
    --accent-light: rgba(59,130,246,0.18);
    --accent-glow: rgba(59,130,246,0.35);
    --success: #4ade80;
    --success-light: rgba(74, 222, 128, 0.16);
    --danger: #f87171;
    --danger-light: rgba(248, 113, 113, 0.16);
    --card-bg: #151e30;
  }
}

/* --- Utility ---------------------------------------------- */
.hidden { display: none !important; }

.shake {
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* --- Animated Background ---------------------------------- */
.app-bg {
  position: fixed; inset: 0; z-index: -1;
  background: var(--bg-base); overflow: hidden;
}
.blob {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.3; will-change: transform;
}
.blob-1 {
  width: 320px; height: 320px; background: var(--accent);
  top: -10%; left: -8%; animation: bf1 18s ease-in-out infinite alternate;
}
.blob-2 {
  width: 260px; height: 260px; background: var(--success);
  bottom: 10%; right: -12%; animation: bf2 22s ease-in-out infinite alternate;
}
.blob-3 {
  width: 240px; height: 240px; background: var(--warning);
  top: 50%; left: 45%; animation: bf3 26s ease-in-out infinite alternate;
}
@keyframes bf1 { 0%{transform:translate(0,0) scale(1)}50%{transform:translate(60px,80px) scale(1.15)}100%{transform:translate(-30px,120px) scale(.95)} }
@keyframes bf2 { 0%{transform:translate(0,0) scale(1)}50%{transform:translate(-70px,-60px) scale(1.1)}100%{transform:translate(40px,-100px) scale(1.05)} }
@keyframes bf3 { 0%{transform:translate(0,0) scale(1)}50%{transform:translate(50px,-70px) scale(.9)}100%{transform:translate(-60px,40px) scale(1.12)} }

/* --- Onboarding ------------------------------------------- */
.onboarding {
  position: fixed; inset: 0; z-index: 950;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.onboarding.hidden { display: none !important; }

.onboarding-card {
  width: 100%; max-width: 380px;
  padding: 40px 28px; text-align: center;
}
.onboarding-emoji { font-size: 3rem; margin-bottom: 12px; }
.onboarding-card h1 {
  font-size: 1.6rem; font-weight: 800; margin-bottom: 8px;
}
.onboarding-card p {
  font-size: 0.9rem; color: var(--text-secondary);
  margin-bottom: 20px; line-height: 1.5;
}
.org-input {
  width: 100%; padding: 14px 16px;
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass-bg); color: var(--text-primary);
  font-size: 1.2rem; font-weight: 700;
  text-align: center; letter-spacing: 0.15em;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.org-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.btn-primary {
  width: 100%; margin-top: 14px; padding: 14px;
  border: none; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff;
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
}
.btn-primary:active { transform: scale(0.97); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.onboarding-hint {
  font-size: 0.78rem; color: var(--text-tertiary);
  margin-top: 12px;
}

/* --- App Shell -------------------------------------------- */
.app {
  position: relative; height: 100dvh;
  display: flex; flex-direction: column;
}

.app-header {
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--safe-top) + 8px) 16px 8px;
  flex-shrink: 0; position: relative;
}
.app-title {
  font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em;
}
.header-btn {
  position: absolute; right: 16px; top: calc(var(--safe-top) + 8px);
  padding: 4px 10px; border-radius: 20px;
  background: var(--accent-light); color: var(--accent);
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.05em;
  border: none; cursor: pointer;
}

/* --- Tab Content ------------------------------------------ */
.tab-content {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 0 14px 14px;
  padding-bottom: calc(var(--tab-bar-h) + var(--safe-bottom) + 16px);
}
.tab-pane { display: none; }
.tab-pane.active {
  display: block;
  animation: fadeIn 0.25s var(--ease);
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Glass Card ------------------------------------------- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 24px var(--glass-shadow);
  padding: 16px;
}

/* --- Balance Card ----------------------------------------- */
.balance-card {
  position: relative; overflow: hidden;
  padding: 24px 16px; margin-bottom: 14px;
}
.balance-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6, var(--accent));
  background-size: 200% 100%;
  animation: shimmer 4s linear infinite;
}
@keyframes shimmer { 0%{background-position:100% 0}100%{background-position:-100% 0} }

.balance-label {
  display: block;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
  color: var(--text-tertiary); margin-bottom: 4px;
  text-transform: uppercase;
}
.balance-amount {
  font-size: 2.6rem; font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.1;
}
.balance-amount.negative { color: var(--danger); }
.balance-amount.positive { color: var(--success); }
.balance-sub {
  font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); margin-top: 4px;
}

/* Budget Bar */
.budget-bar { margin-top: 16px; }
.budget-info {
  display: flex; justify-content: space-between;
  font-size: 0.75rem; font-weight: 600; color: var(--text-secondary);
  margin-bottom: 6px;
}
.budget-pct-warn { color: var(--danger) !important; }
.progress-track {
  height: 8px; background: var(--glass-bg);
  border-radius: 4px; overflow: hidden;
}
.progress-fill {
  height: 100%; border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6);
  transition: width 0.5s var(--ease);
}
.progress-fill.over { background: linear-gradient(90deg, var(--danger), #f97316); }
.progress-fill.warn { background: linear-gradient(90deg, var(--warning), #f97316); }

/* KPI Row */
.kpi-row {
  display: flex; gap: 8px; margin-top: 16px;
}
.kpi-card {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; gap: 2px;
  background: rgba(0,0,0,0.04); border-radius: var(--radius-sm);
  padding: 10px 6px;
}
@media (prefers-color-scheme: dark) {
  .kpi-card { background: rgba(255,255,255,0.05); }
}
.kpi-title {
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.08em;
  color: var(--text-tertiary); text-transform: uppercase;
}
.kpi-value { font-size: 1.05rem; font-weight: 700; color: var(--accent); }
.kpi-purple { color: #8b5cf6; }

/* Balance Actions */
.balance-actions {
  display: flex; gap: 10px; margin-top: 16px;
}
.btn-pay {
  flex: 1; padding: 13px; border: none; border-radius: var(--radius-sm);
  background: rgba(34,197,94,0.15); color: var(--success);
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: transform 0.15s;
}
.btn-pay:active { transform: scale(0.96); }

.btn-undo {
  padding: 13px 20px; border: none; border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.06); color: var(--text-primary);
  font-size: 1.1rem; font-weight: 700; cursor: pointer;
}
@media (prefers-color-scheme: dark) {
  .btn-undo { background: rgba(255,255,255,0.08); }
}

/* --- Drink Grid ------------------------------------------- */
.drink-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.drink-btn {
  position: relative;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px; padding: 20px 8px;
  border: 1px solid var(--glass-border);
  cursor: pointer; user-select: none; -webkit-user-select: none;
  transition: transform 0.15s var(--ease), box-shadow 0.2s;
}
.drink-btn.pressed, .drink-btn:active {
  transform: scale(0.94);
  box-shadow: 0 2px 10px var(--glass-shadow);
}
.drink-emoji { font-size: 2.4rem; line-height: 1; }
.drink-name { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); }
.drink-price { font-size: 1.1rem; font-weight: 800; color: var(--accent); }

.drink-btn.top { border: 1.5px solid rgba(245,166,35,0.6); }
.top-badge {
  position: absolute; top: 6px; right: 6px;
  font-size: 0.6rem; font-weight: 800; letter-spacing: 0.05em;
  color: #f5a623; background: rgba(245,166,35,0.15);
  padding: 2px 6px; border-radius: 20px;
}

.safe-zone { height: 40px; pointer-events: none; }

/* --- Undo Toast ------------------------------------------- */
.undo-toast {
  position: fixed;
  bottom: calc(var(--tab-bar-h) + var(--safe-bottom) + 16px);
  left: 50%; transform: translateX(-50%) translateY(120%);
  z-index: 900;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: var(--accent); color: #fff;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px var(--accent-glow);
  font-size: 0.85rem; font-weight: 600;
  white-space: nowrap; opacity: 0;
  transition: transform 0.4s var(--ease), opacity 0.4s var(--ease);
  pointer-events: none;
  border: 2px solid transparent;
}
.undo-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1; pointer-events: auto;
}
.undo-toast-btn {
  background: rgba(255,255,255,0.22); border: none;
  color: #fff; font-weight: 700; padding: 5px 12px;
  border-radius: var(--radius-sm); cursor: pointer;
}
.undo-toast-btn:active { background: rgba(255,255,255,0.35); }

/* --- Tab Bar ---------------------------------------------- */
.tab-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 800;
  display: flex; justify-content: space-around; align-items: flex-start;
  height: calc(var(--tab-bar-h) + var(--safe-bottom));
  padding-top: 8px; padding-bottom: var(--safe-bottom);
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(1.6);
  -webkit-backdrop-filter: blur(28px) saturate(1.6);
  border-top: 1px solid var(--glass-border);
}
.tab-btn {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 6px 12px; border: none; background: none;
  color: var(--text-tertiary); font-size: 0.62rem; font-weight: 600;
  cursor: pointer; user-select: none; -webkit-user-select: none;
  position: relative; transition: color 0.2s;
}
.tab-icon { font-size: 1.3rem; line-height: 1; transition: transform 0.15s; }
.tab-label { }
.tab-btn.active { color: var(--accent); }
.tab-btn.active .tab-icon { transform: scale(1.12); }
.tab-btn.active::before {
  content: ''; position: absolute; top: -1px; left: 50%;
  transform: translateX(-50%); width: 24px; height: 3px;
  background: var(--accent); border-radius: 0 0 3px 3px;
}

/* --- Section Titles --------------------------------------- */
.section-title {
  font-size: 1.2rem; font-weight: 700; margin-bottom: 14px;
}
.section-subtitle {
  font-size: 0.95rem; font-weight: 700; margin: 20px 0 10px;
}

/* --- History List ----------------------------------------- */
.history-list {
  display: flex; flex-direction: column; gap: 8px;
}
.history-item {
  position: relative; border-radius: var(--radius-sm);
  overflow: hidden;
}
.history-item-delete {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: flex-end;
  padding-right: 20px; background: var(--danger);
  color: #fff; font-weight: 700; font-size: 0.85rem;
  border-radius: var(--radius-sm); cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}
.history-item.swiping .history-item-delete,
.history-item.swiped .history-item-delete {
  opacity: 1;
  pointer-events: auto;
}
.history-item-inner {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  will-change: transform;
}
.history-emoji { font-size: 1.4rem; }
.history-info { flex: 1; display: flex; flex-direction: column; }
.history-name { font-weight: 600; font-size: 0.88rem; }
.history-time { font-size: 0.7rem; color: var(--text-tertiary); }
.history-amount { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.amount-red { color: var(--danger); }
.amount-green { color: var(--success); }

.history-item.removing {
  animation: removeItem 0.3s var(--ease) forwards;
}
@keyframes removeItem {
  to { opacity: 0; max-height: 0; transform: translateX(100%); }
}

.empty-state {
  text-align: center; padding: 40px 16px; color: var(--text-tertiary);
}
.empty-emoji { font-size: 2.5rem; display: block; margin-bottom: 8px; }
.empty-hint { color: var(--text-tertiary); font-size: 0.85rem; text-align: center; padding: 20px; }

/* --- Stats ------------------------------------------------ */
.stats-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-bottom: 10px;
}
.stat-card {
  text-align: center; padding: 14px;
}
.stat-value { display: block; font-size: 1.2rem; font-weight: 800; }
.stat-label {
  display: block; font-size: 0.65rem; font-weight: 600;
  color: var(--text-tertiary); text-transform: uppercase;
  letter-spacing: 0.05em; margin-top: 2px;
}

/* Top Drinks */
.top-drink-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; margin-bottom: 8px;
}
.top-drink-row.first {
  border: 1.5px solid rgba(245,166,35,0.4);
}
.top-rank {
  font-size: 0.75rem; font-weight: 800;
  color: var(--accent); min-width: 24px;
}
.top-emoji { font-size: 1.3rem; }
.top-info { flex: 1; }
.top-name { font-weight: 600; font-size: 0.88rem; display: block; }
.top-bar-track {
  height: 6px; background: rgba(0,0,0,0.06); border-radius: 3px;
  margin-top: 4px; overflow: hidden;
}
@media (prefers-color-scheme: dark) {
  .top-bar-track { background: rgba(255,255,255,0.06); }
}
.top-bar-fill {
  height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6);
  transition: width 0.5s;
}
.top-count { font-weight: 700; font-size: 0.9rem; color: var(--text-secondary); }

/* --- Settings --------------------------------------------- */
.settings-section { margin-bottom: 24px; }
.settings-label {
  display: block; font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-tertiary); padding-left: 4px;
  margin-bottom: 8px;
}
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; min-height: 48px;
  font-size: 0.9rem;
}
.setting-row + .setting-row {
  margin-top: 6px;
}
.setting-input {
  width: 70px; padding: 8px 10px; border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); background: var(--glass-bg);
  color: var(--text-primary); font-weight: 600; text-align: right;
  outline: none;
}
.setting-input:focus { border-color: var(--accent); }
.setting-select {
  padding: 6px 28px 6px 10px; border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); background: var(--glass-bg);
  color: var(--text-primary); font-weight: 500;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center;
  cursor: pointer; outline: none;
}
.btn-small {
  padding: 6px 14px; border: none; border-radius: var(--radius-sm);
  background: var(--accent-light); color: var(--accent);
  font-weight: 700; font-size: 0.82rem; cursor: pointer;
}
.btn-small:active { opacity: 0.7; }
.btn-danger {
  background: var(--danger-light); color: var(--danger);
}
.danger-row { border: 1px solid rgba(239,68,68,0.2); }

/* --- Drink Editor ----------------------------------------- */
.drink-editor-row {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; margin-bottom: 6px;
}
.drink-editor-emoji {
  width: 42px; text-align: center; font-size: 1.3rem;
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  background: var(--glass-bg); padding: 6px 2px;
  outline: none;
}
.drink-editor-emoji:focus { border-color: var(--accent); }
.drink-editor-name {
  flex: 1; min-width: 0; padding: 8px 10px;
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  background: var(--glass-bg); color: var(--text-primary);
  font-weight: 500; outline: none;
}
.drink-editor-name:focus { border-color: var(--accent); }
.drink-editor-price-wrap {
  display: flex; align-items: center; gap: 2px;
  position: relative;
}
.drink-editor-price {
  width: 64px; padding: 8px 6px; text-align: right;
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  background: var(--glass-bg); color: var(--text-primary);
  font-weight: 700; outline: none;
}
.drink-editor-price:focus { border-color: var(--accent); }
.drink-editor-currency {
  font-weight: 700; font-size: 0.85rem; color: var(--text-tertiary);
}
.drink-editor-del {
  width: 32px; height: 32px; border: none;
  border-radius: 50%; background: var(--danger-light);
  color: var(--danger); font-weight: 700; font-size: 0.9rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: transform 0.15s;
}
.drink-editor-del:active { transform: scale(0.85); }

.drink-editor-actions {
  display: flex; gap: 8px; margin-top: 12px;
}
.btn-add-drink {
  flex: 1; padding: 12px; border: 2px dashed var(--accent);
  border-radius: var(--radius-sm); background: var(--accent-light);
  color: var(--accent); font-weight: 700; font-size: 0.85rem;
  cursor: pointer; text-align: center;
  transition: background 0.15s, transform 0.15s;
}
.btn-add-drink:active { transform: scale(0.97); }
.btn-reset-prices {
  padding: 12px 16px; border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); background: var(--glass-bg);
  color: var(--text-secondary); font-weight: 600; font-size: 0.82rem;
  cursor: pointer; white-space: nowrap;
}
.btn-reset-prices:active { opacity: 0.7; }

/* --- Tip Toggle ------------------------------------------- */
.tip-toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; padding: 14px 16px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
}
.tip-toggle-label {
  font-weight: 600; font-size: 0.88rem;
  color: var(--text-primary);
}
.tip-switch {
  position: relative; display: inline-block;
  width: 52px; height: 30px; flex-shrink: 0;
}
.tip-switch input { opacity: 0; width: 0; height: 0; }
.tip-switch-slider {
  position: absolute; inset: 0; cursor: pointer;
  background: var(--glass-border); border-radius: 30px;
  transition: background 0.25s;
}
.tip-switch-slider::before {
  content: ''; position: absolute;
  width: 24px; height: 24px; border-radius: 50%;
  left: 3px; bottom: 3px;
  background: white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  transition: transform 0.25s;
}
.tip-switch input:checked + .tip-switch-slider {
  background: var(--accent);
}
.tip-switch input:checked + .tip-switch-slider::before {
  transform: translateX(22px);
}

.settings-footer {
  text-align: center; font-size: 0.75rem; color: var(--text-tertiary);
  margin-top: 32px;
}


/* --- Payment Modal ---------------------------------------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: flex-end; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.modal-overlay.show { opacity: 1; pointer-events: auto; }
.modal-overlay.hidden { display: none; }

.payment-panel {
  width: 100%; max-width: 480px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: 28px 20px;
  padding-bottom: calc(28px + var(--safe-bottom));
  transform: translateY(100%);
  transition: transform 0.4s var(--ease);
  background: var(--bg-base);
  border: 1px solid var(--glass-border);
  border-bottom: none;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.15);
}
.modal-overlay.show .payment-panel { transform: translateY(0); }

.payment-panel h2 {
  font-size: 1.15rem; font-weight: 700; margin-bottom: 16px;
  text-align: center;
  color: var(--text-primary);
}

/* --- New Payment Design ---------------------------------- */
.pay-debt-status {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: -8px;
  margin-bottom: 20px;
}
.pay-debt-status strong {
  color: var(--text-primary);
  font-weight: 700;
}

.pay-amount-input-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 20px;
}
.pay-input-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.pay-input-wrapper {
  position: relative;
  width: 160px;
}
.pay-large-input {
  width: 100%;
  padding: 10px;
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
@media (prefers-color-scheme: dark) {
  .pay-large-input {
    background: #1e293b;
  }
}
.pay-large-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
/* remove spinner arrows */
.pay-large-input::-webkit-outer-spin-button,
.pay-large-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.pay-large-input[type=number] {
  -moz-appearance: textfield;
}

.pay-section { margin-top: 20px; }
.quick-pay-row { display: flex; gap: 6px; margin-top: 8px; }
.quick-btn {
  flex: 1; padding: 12px 6px; border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm); background: var(--glass-bg);
  color: var(--text-primary); font-weight: 700; font-size: 0.9rem;
  cursor: pointer; text-align: center;
  transition: background 0.15s, border-color 0.15s;
}
.quick-btn:active { background: var(--accent-light); border-color: var(--accent); }
.select-all-btn {
  border-color: rgba(0, 102, 255, 0.4);
  background: var(--accent-light);
  color: var(--accent);
}
.select-all-btn:active {
  background: var(--accent);
  color: white;
}

/* --- Step-by-Step Payment Styles -------------------------- */
.pay-step {
  animation: fadeInStep 0.25s var(--ease);
}
@keyframes fadeInStep {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.btn-pay-next {
  width: 100%; padding: 16px; border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  color: #fff; cursor: pointer;
  font-weight: 700; font-size: 1.05rem;
  box-shadow: 0 4px 15px var(--accent-glow);
  transition: transform 0.1s;
}
.btn-pay-next:active { transform: scale(0.97); }

.btn-pay-back {
  display: block; margin: 20px auto 0;
  background: none; border: none;
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 600;
  cursor: pointer; padding: 6px 12px;
  transition: opacity 0.15s;
}
.btn-pay-back:active { opacity: 0.6; }

.pay-selected-summary {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding: 12px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
}
.pay-selected-summary strong {
  color: var(--accent);
  font-weight: 800;
}

.pay-actions-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}
.btn-pay-action {
  width: 100%;
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  cursor: pointer;
  transition: transform 0.1s, opacity 0.1s, box-shadow 0.15s;
}
.btn-pay-action:active {
  transform: scale(0.97);
}

.btn-pay-no-tip {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}
.btn-pay-no-tip:active {
  background: rgba(255, 255, 255, 0.08);
}
.btn-pay-no-tip .pay-btn-title {
  color: var(--text-primary);
}
.btn-pay-no-tip .pay-btn-sub {
  color: var(--text-secondary);
}
.btn-pay-no-tip .pay-btn-amount {
  color: var(--accent);
}


.btn-pay-incl-tip {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  border: none;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.25);
}
.btn-pay-incl-tip:active {
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.15);
}
.btn-pay-incl-tip .pay-btn-title {
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.btn-pay-incl-tip .pay-btn-sub {
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}
.btn-pay-incl-tip .pay-btn-amount {
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.pay-question-box {
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 24px;
  padding: 12px;
  background: var(--glass-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
}
.pay-question-box strong {
  color: var(--accent);
  font-weight: 800;
}

.pay-btn-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}
.pay-btn-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  text-align: left;
}
.pay-btn-title {
  font-size: 0.95rem;
  font-weight: 700;
}
.pay-btn-sub {
  font-size: 0.72rem;
  opacity: 0.85;
  font-weight: 500;
}
.pay-btn-amount {
  font-size: 1.25rem;
  font-weight: 800;
}

/* --- Responsive ------------------------------------------- */
@media (min-width: 480px) {
  .tab-content { max-width: 480px; margin: 0 auto; }
  .tab-bar {
    max-width: 480px; left: 50%; transform: translateX(-50%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
  .undo-toast { max-width: 420px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}