:root {
  --bg: #fdf6e3;
  --card-bg: #ffffff;
  --text: #3e2723;
  --muted: #795548;
  --accent: #6f4e37;
  --accent-light: #a1887f;
  --danger: #c62828;
  --danger-light: #e57373;
  --success: #2e7d32;
  --chip-inactive: #efebe9;
  --chip-active: #d7ccc8;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.75rem;

  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-pill: 999px;

  --shadow: 0 4px 16px rgba(62, 39, 35, 0.12);
  --shadow-lg: 0 -4px 20px rgba(62, 39, 35, 0.15);
  --shadow-fab: 0 6px 0 hsla(23, 57%, 19%, 0.23);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body {
  padding: var(--space-lg) var(--space-lg) 7rem;
  max-width: 720px;
  margin: 0 auto;
}

.topbar {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.topbar h1 {
  margin: 0;
  font-size: 1.8rem;
}

.topbar p {
  margin: var(--space-sm) 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.card-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  min-width: 0;
}

.cup {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.cup-sm {
  width: 52px;
  height: 52px;
}

.cup-lg {
  width: 68px;
  height: 68px;
}

.flying-cup {
  position: fixed;
  pointer-events: none;
  z-index: 50;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.6s ease;
}

.cup-container {
  width: 70px;
  height: 50px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
  flex: 1;
  min-width: 0;
}

.card-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.variant-label {
  font-size: 1rem;
  color: var(--muted);
  font-weight: 500;
  margin-top: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.chips {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

/* Unified button system */
.btn {
  --btn-bg: var(--chip-inactive);
  --btn-color: var(--text);

  border: none;
  border-radius: var(--radius-xl);
  padding: var(--space-sm) var(--space-md);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: var(--btn-bg);
  color: var(--btn-color);
  touch-action: manipulation;
  transition: transform 0.08s ease, box-shadow 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  --btn-bg: var(--accent);
  --btn-color: #fff;
}

.btn-secondary {
  --btn-bg: var(--chip-active);
  --btn-color: var(--text);
}

.btn-danger {
  --btn-bg: var(--danger);
  --btn-color: #fff;
}

.btn-ghost {
  --btn-bg: var(--chip-inactive);
  --btn-color: var(--text);
}

.btn-primary:hover:not(:disabled) { --btn-bg: #5d4037; }
.btn-secondary:hover:not(:disabled) { --btn-bg: #bcaaa4; }
.btn-danger:hover:not(:disabled) { --btn-bg: #b71c1c; }
.btn-ghost:hover:not(:disabled) { --btn-bg: #d7ccc8; }

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.btn-pill {
  border-radius: var(--radius-pill);
}

.btn-square {
  aspect-ratio: 1;
  min-width: 2.75rem;
  padding: var(--space-sm);
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: 1rem;
}

.btn-square.btn-sm {
  font-size: 1.4rem;
}

.btn-lg {
  padding: var(--space-md) var(--space-lg);
  font-size: 1.35rem;
}

.btn-icon {
  font-size: 1.5rem;
}

.chip[aria-pressed="true"] {
  --btn-bg: var(--chip-active);
  box-shadow: inset 0 0 0 2px var(--accent);
}

.pressed {
  animation: press-pop 0.25s ease;
}

@keyframes press-pop {
  0% { transform: scale(1); }
  40% { transform: scale(0.9); }
  75% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.card-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.custom-input {
  width: 100%;
  border: 2px solid var(--chip-active);
  border-radius: var(--radius-xl);
  padding: var(--space-sm) var(--space-md);
  font-size: 1.1rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.custom-input:focus {
  border-color: var(--accent);
}

.summary {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100%;
  max-width: 720px;
  background: var(--card-bg);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  transform: translateX(-50%) translateY(100%);
  transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-xl) var(--space-lg);
  z-index: 20;
  display: flex;
  flex-direction: column;
}

.summary.open {
  transform: translateX(-50%) translateY(0);
}

.close-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  font-size: 1.3rem;
}

.fab {
  position: fixed;
  bottom: var(--space-lg);
  left: 0;
  right: 0;
  margin: 0 auto;
  width: fit-content;
  padding: var(--space-md) var(--space-xl);
  font-size: 1.3rem;
  gap: var(--space-sm);
  box-shadow: var(--shadow-fab);
  z-index: 15;
}

.fab:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 hsla(23, 57%, 19%, 0.23);
}

.fab-icon {
  font-size: 1.6rem;
}

.fab-count {
  min-width: 1.5ch;
  font-size: 1.4rem;
  text-align: center;
}

.onboarding {
  position: fixed;
  bottom: 6.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100% - var(--space-lg) * 2);
  background: var(--accent);
  color: #fff;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-xl);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  box-shadow: var(--shadow);
  z-index: 16;
  opacity: 1;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.onboarding.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(12px);
  pointer-events: none;
}

.onboarding-arrow {
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid var(--accent);
}

.summary h2 {
  margin: 0 0 var(--space-md);
  font-size: 1.5rem;
}

.total-line {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--chip-active);
}

#summary-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

#summary-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--chip-inactive);
  font-size: 1.1rem;
}

#summary-list li:last-child {
  border-bottom: none;
}

#summary-list .empty {
  color: var(--muted);
  font-style: italic;
  text-align: center;
  display: block;
  width: 100%;
  font-size: 1.05rem;
}

.order-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1.15rem;
}

.order-count {
  font-weight: 700;
  min-width: 2.5ch;
  font-size: 1.5rem;
  text-align: right;
}

.summary-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.summary-actions .btn {
  flex: 1;
}

.pay-btn {
  width: 100%;
  margin-top: var(--space-lg);
}

.pay-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(62, 39, 35, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.pay-modal.hidden {
  display: none;
}

.pay-card {
  position: relative;
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: var(--space-xl) var(--space-lg);
  width: 100%;
  max-width: 420px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.pay-card h2 {
  margin: 0;
  font-size: 1.5rem;
}

.pay-cup {
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pay-cup .cup {
  width: 84px;
  height: 84px;
}

.pay-drink {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  min-height: 1.4em;
}

.pay-drink.revealed {
  animation: press-pop 0.35s ease;
}

.pay-tiebreak {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  min-height: 1.3em;
}

.feedback {
  margin: var(--space-sm) 0 0;
  font-size: 1rem;
  color: var(--success);
  min-height: 1.3em;
  text-align: center;
}

@media (max-width: 360px) {
  .cup {
    width: 48px;
    height: 48px;
  }

  .cup-lg {
    width: 56px;
    height: 56px;
  }

  .card-title {
    font-size: 1.2rem;
  }

  .btn-lg {
    padding: var(--space-sm) var(--space-md);
    font-size: 1.2rem;
  }
}