:root {
  --primary: #00b894;
  --primary-dark: #008f72;
  --accent: #f39c12;
  --danger: #d63031;
  --bg-dark: #ffffff;
  /* 白色背景 */
  --bg-card: #f8f9fa;
  /* 极浅灰卡片背景 */
  --text-main: #2d3436;
  /* 深灰色主文字 */
  --text-muted: #636e72;
  /* 灰色次要文字 */
  --border: #edf2f7;
  /* 浅灰色边框 */
  --glass-bg: rgba(0, 0, 0, 0.02);
  --glass-blur: 15px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0);
}

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

body {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans SC', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-user-select: none;
  user-select: none;
  overflow-x: hidden;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
}

/* ===== View Management ===== */
.view {
  display: none;
  min-height: 100vh;
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease-out;
}

.view.active {
  display: flex;
  flex-direction: column;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0 20px 0;
  position: sticky;
  top: 0;
  background: var(--bg-dark);
  z-index: 10;
}

.view-header h2 {
  font-size: 1.25rem;
  flex: 1;
  text-align: center;
}

/* ===== Buttons & Inputs ===== */
.btn {
  border: none;
  border-radius: 12px;
  padding: 12px 20px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #d4ac0d);
  color: #000;
}

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

.btn-lg {
  padding: 16px 24px;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn:active {
  transform: scale(0.98);
  opacity: 0.9;
}

.btn-back {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  padding: 5px 10px;
  cursor: pointer;
}

.btn-icon-only {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
}

.input-room {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 1rem;
  width: 100%;
}

/* ===== Home View ===== */
.home-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.logo-section {
  text-align: center;
}

.logo-icon {
  font-size: 4rem;
  margin-bottom: 10px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.home-actions {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.join-section {
  display: flex;
  gap: 10px;
}

/* ===== Setup View ===== */
.setup-container {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group label {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-card);
  padding: 4px;
  border-radius: 12px;
}

.toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 10px;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.2s;
}

.toggle-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 10px rgba(0, 184, 148, 0.3);
}

.stepper {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border-radius: 12px;
  padding: 4px;
}

.stepper-btn {
  background: var(--border);
  border: none;
  color: var(--text-main);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  font-size: 1.2rem;
}

.stepper-value {
  flex: 1;
  text-align: center;
  font-weight: 700;
  font-size: 1.1rem;
}

/* ===== Game View ===== */
.room-code-badge {
  background: var(--primary);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.8rem;
  margin-left: 5px;
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-bottom: 30px;
}

.scoreboard.four-players {
  grid-template-columns: repeat(2, 1fr);
}

.player-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 15px;
  text-align: center;
  transition: transform 0.2s;
  box-shadow: var(--shadow);
}

.player-card.is-active {
  border-color: var(--primary);
  background: rgba(0, 184, 148, 0.1);
}

.player-score {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 5px;
}

.player-name {
  color: var(--text-muted);
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.game-actions {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto;
  gap: 12px;
  margin-bottom: 30px;
}

#btn-record-round {
  grid-column: 1 / 2;
  grid-row: 1 / 3;
}

#btn-record-kong {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
}

#btn-undo {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.history-item {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
  cursor: pointer;
}

.history-item:hover {
  border-color: var(--primary);
  background: white;
}

.history-item:active {
  background: #f0f0f0;
  transform: scale(0.99);
}

.history-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.history-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.history-type {
  font-weight: 700;
  font-size: 0.95rem;
}

.history-detail {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.history-score {
  font-weight: 700;
  color: var(--primary);
}

.history-score.negative {
  color: var(--danger);
}

/* 退出房间按钮 */
.btn-logout {
  background: none;
  border: none;
  font-size: 1.2rem;
  padding: 8px;
  cursor: pointer;
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s;
}

.btn-logout:hover {
  background: rgba(214, 48, 49, 0.1);
}

/* 玩法模式切换开关 */
.mode-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked+.slider {
  background-color: var(--primary);
}

input:checked+.slider:before {
  transform: translateX(20px);
}

.history-details {
  display: none;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  gap: 12px;
  flex-direction: column;
}

.history-item.expanded .history-details {
  display: flex;
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.detail-pay-chip {
  display: flex;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.03);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.detail-pay-chip .val.plus {
  color: var(--primary);
  font-weight: 700;
}

.detail-pay-chip .val.minus {
  color: var(--danger);
  font-weight: 700;
}

.history-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.h-tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ===== Modals ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  display: none;
  align-items: flex-end;
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 24px 24px 0 0;
  padding: 20px;
  max-height: 90vh;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.1);
  overflow-y: auto;
  padding-bottom: calc(20px + var(--safe-area-inset-bottom));
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }

  to {
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.player-select {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

.select-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
}

.select-btn.active {
  background: rgba(0, 184, 148, 0.2);
  border-color: var(--primary);
  color: var(--primary);
}

.select-btn.disabled {
  background: #f1f2f6;
  border-color: #dfe6e9;
  color: #b2bec3;
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

.hand-type-grid,
.modifier-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modifier-grid {
  grid-template-columns: 1fr 1fr 1fr;
}

.score-preview {
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 15px;
  margin-top: 10px;
}

.preview-breakdown {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 5px;
}

.preview-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.preview-multiplier {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
}

.preview-payments {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.payment-chip {
  background: var(--bg-card);
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
}

.chip-val {
  font-weight: 700;
  color: var(--primary);
}

.chip-val.minus {
  color: var(--danger);
}