/* ==================== 全局变量 & 重置 ==================== */
:root {
  --primary: #4da6ff;
  --primary-dark: #2b8aeb;
  --bg: #f0f4f8;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #666;
  --text-muted: #999;
  --border: #e8ecf1;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 14px;
  --radius-sm: 8px;
  --success: #4caf50;
  --danger: #f44336;
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  /* PWA 安全区域 */
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* ==================== 布局 ==================== */
.app-container {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: 32px;
}

/* ==================== 头部 ==================== */
.app-header {
  text-align: center;
  padding: 20px 0 12px;
  position: relative;
}

.app-header h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.date-display {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.btn-settings {
  position: absolute;
  right: 0;
  top: 22px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: 18px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
  text-decoration: none;
}
.btn-settings:hover { background: #f0f4f8; border-color: #bbb; }

/* ==================== 概览卡片 ==================== */
.overview-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  text-align: center;
}

.overview-main { margin-bottom: 16px; }
.total-water { display: flex; align-items: baseline; justify-content: center; gap: 4px; }
.total-number { font-size: 48px; font-weight: 800; color: var(--primary); line-height: 1; transition: color var(--transition); }
.total-unit { font-size: 18px; color: var(--text-secondary); font-weight: 500; }
.total-label { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.progress-bar-wrapper { height: 10px; background: #e8f0fe; border-radius: 5px; overflow: hidden; margin-bottom: 8px; }
.progress-bar {
  height: 100%; background: var(--primary); border-radius: 5px;
  transition: width 0.5s ease, background 0.5s ease; width: 0%;
}
.progress-bar.goal-complete { background: linear-gradient(90deg, #4caf50, #8bc34a); }
/* 进度条样式变体 */
.progress-bar.style-stripe {
  background: repeating-linear-gradient(-45deg, var(--primary), var(--primary) 4px, #fff6 4px, #fff6 8px);
}
.progress-bar.style-glow {
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}
.progress-bar.style-dot {
  background: repeating-linear-gradient(90deg, var(--primary) 0%, var(--primary) 6px, transparent 6px, transparent 12px);
}
.progress-bar.style-wave {
  background: var(--primary);
  animation: waveShine 1.5s ease-in-out infinite;
}
@keyframes waveShine {
  0% { filter: brightness(1); } 50% { filter: brightness(1.3); } 100% { filter: brightness(1); }
}
.progress-text { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }

.category-badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.category-badge { display: flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 20px; font-size: 12px; color: #fff; font-weight: 500; }
.category-badge .badge-icon { font-size: 14px; }

/* ==================== 快速记录 ==================== */
.quick-record {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.quick-record h2 { font-size: 16px; margin-bottom: 14px; font-weight: 600; }

/* 分类标签 */
.category-tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
  overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar { display: none; }

.cat-tab {
  flex-shrink: 0; padding: 8px 16px; border-radius: 20px;
  border: 2px solid var(--border); background: #fff;
  font-size: 14px; cursor: pointer; transition: all var(--transition);
  white-space: nowrap; font-weight: 500; user-select: none;
}
.cat-tab:hover { border-color: #bbb; }
.cat-tab.active { color: #fff; border-color: transparent; }

/* 子类下拉 */
.sub-selector { margin-bottom: 12px; }
.sub-selector select {
  width: 100%; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); font-size: 14px;
  background: #fafbfc; outline: none; cursor: pointer;
  transition: border-color var(--transition); appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
  padding-right: 36px;
}
.sub-selector select:focus { border-color: var(--primary); }

/* 快捷项容器 */
.quick-items {
  display: flex; flex-direction: column; gap: 14px;
  margin-bottom: 14px; min-height: 40px;
}

/* 纯数量按钮网格（白水） */
.quick-items-water {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
}

.quick-item-btn.solo-num {
  padding: 14px 6px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: #fafbfc;
  cursor: pointer; text-align: center; transition: all var(--transition);
  font-size: 18px; font-weight: 700; position: relative;
}
.quick-item-btn.solo-num:hover { border-color: var(--primary); background: #f0f7ff; color: var(--primary); transform: translateY(-1px); }
.quick-item-btn.solo-num:active { transform: scale(0.95); }

/* 子类分组 */
.item-group {}
.item-group-label { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; padding-left: 2px; letter-spacing: 0.5px; }
.item-group-items { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }

/* 通用快捷按钮 */
.quick-item-btn {
  padding: 12px 8px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: #fafbfc;
  cursor: pointer; text-align: center; transition: all var(--transition);
  font-size: 14px; position: relative;
}
.quick-item-btn:hover { border-color: #bbb; background: #f0f4f8; transform: translateY(-1px); }
.quick-item-btn:active { transform: scale(0.97); }
.quick-item-btn .item-name { font-weight: 600; display: block; margin-bottom: 2px; }
.quick-item-btn .item-volume { font-size: 12px; color: var(--text-secondary); }

.quick-item-btn .item-delete {
  position: absolute; top: 4px; right: 6px;
  width: 20px; height: 20px; border-radius: 50%; border: none;
  background: rgba(0,0,0,0.08); color: var(--text-muted);
  font-size: 12px; cursor: pointer; display: none;
  align-items: center; justify-content: center; line-height: 1;
}
.quick-item-btn:hover .item-delete { display: flex; }
.quick-item-btn .item-delete:hover { background: var(--danger); color: #fff; }

/* 新增按钮 */
.add-item-btn {
  display: flex; align-items: center; justify-content: center; gap: 4px;
  padding: 12px 8px; border-radius: var(--radius-sm);
  border: 1.5px dashed var(--border); background: transparent;
  cursor: pointer; color: var(--text-muted); font-size: 14px; transition: all var(--transition);
}
.add-item-btn:hover { border-color: var(--primary); color: var(--primary); background: #f0f7ff; }

/* 自定义输入（子类内嵌） */
.custom-record { margin-top: 6px; }
.custom-row {
  display: flex; gap: 8px; align-items: center;
  padding: 8px 12px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #f8faff 0%, #f0f4f8 100%);
  border: 1.5px dashed #c8d6e5;
  transition: all var(--transition);
}
.custom-row:focus-within {
  border-color: var(--primary);
  background: linear-gradient(135deg, #f0f5ff 0%, #e8f0fe 100%);
  box-shadow: 0 0 0 3px rgba(77,166,255,0.08);
}

.custom-row-prefix {
  font-size: 14px; color: var(--text-muted); white-space: nowrap;
  font-weight: 500;
}
.custom-row input {
  flex: 1; padding: 8px 10px; border-radius: 6px;
  border: 1.5px solid var(--border); font-size: 14px;
  outline: none; transition: border-color var(--transition);
  background: #fff; min-width: 60px;
}
.custom-row input:focus { border-color: var(--primary); }
.custom-row .custom-record-btn {
  padding: 8px 16px; font-size: 13px; font-weight: 600;
  border-radius: 6px; white-space: nowrap;
}

/* ==================== 按钮 ==================== */
.btn {
  padding: 10px 20px; border-radius: var(--radius-sm); border: none;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all var(--transition); white-space: nowrap;
}
.btn:active { transform: scale(0.96); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #f0f0f0; color: var(--text); }
.btn-secondary:hover { background: #e0e0e0; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger {
  background: transparent; color: var(--danger); padding: 4px 8px;
  font-size: 12px; border: 1px solid transparent; cursor: pointer; border-radius: 4px;
}
.btn-danger:hover { background: #fff0f0; border-color: #ffcccc; }

/* ==================== 记录列表 ==================== */
.record-list-section {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.record-list-section h2 { font-size: 16px; margin-bottom: 14px; font-weight: 600; }
.record-list { display: flex; flex-direction: column; gap: 8px; }
.empty-state { text-align: center; color: var(--text-muted); padding: 30px 0; font-size: 14px; }

.record-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  border-radius: var(--radius-sm); background: #fafbfc;
  border: 1px solid var(--border); transition: all var(--transition);
}
.record-item:hover { border-color: #ccc; }
.record-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.record-info { flex: 1; min-width: 0; }
.record-info .record-name { font-weight: 600; font-size: 14px; }
.record-info .record-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.record-volume { font-size: 18px; font-weight: 700; color: var(--text); flex-shrink: 0; }
.record-unit { font-size: 12px; color: var(--text-muted); font-weight: 500; }
.record-delete { flex-shrink: 0; opacity: 0; transition: opacity var(--transition); }
.record-item:hover .record-delete { opacity: 1; }

/* ==================== 通用弹窗 ==================== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 200; opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal {
  background: #fff; border-radius: var(--radius); padding: 24px;
  width: 90%; max-width: 380px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  transform: translateY(10px); transition: transform var(--transition);
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal h3 { font-size: 18px; margin-bottom: 16px; font-weight: 600; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); font-size: 14px; outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group select:focus { border-color: var(--primary); }

.color-pick-row { display: flex; gap: 8px; flex-wrap: wrap; }
.color-dot { width: 28px; height: 28px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; transition: all var(--transition); }
.color-dot:hover { transform: scale(1.15); }
.color-dot.selected { border-color: #333; transform: scale(1.2); }

.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ==================== 庆祝动画 ==================== */
.total-number.celebrate {
  animation: celebratePulse 0.6s ease-in-out 3;
}
@keyframes celebratePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* 撒花粒子 */
.confetti-container {
  position: fixed; inset: 0; pointer-events: none; z-index: 999; overflow: hidden;
}
.confetti-piece {
  position: absolute; width: 10px; height: 10px; border-radius: 2px;
  animation: confettiFall 2s ease-out forwards;
}
@keyframes confettiFall {
  0%   { transform: translateY(-10vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

.overview-card.goal-reached {
  border: 2px solid var(--success);
  box-shadow: 0 0 20px rgba(76,175,80,0.15), var(--shadow);
  transition: all 0.5s ease;
}

/* ==================== Toast ==================== */
.toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  padding: 10px 24px; border-radius: 20px; font-size: 14px; font-weight: 500;
  color: #fff; z-index: 300;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 1.7s forwards;
  pointer-events: none;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}
@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ==================== 响应式 ==================== */

/* --- 桌面端 (>768px)：居中宽布局、更大操作区域 --- */
@media (min-width: 769px) {
  .app-container {
    max-width: 560px;
    padding: 24px 16px 40px;
  }
  .total-number { font-size: 56px; }
  .app-header h1 { font-size: 28px; }
  .cat-tab { padding: 10px 20px; font-size: 15px; }
  .quick-item-btn { padding: 14px 10px; font-size: 15px; }
  .quick-item-btn.solo-num { font-size: 20px; padding: 16px 8px; }
  .quick-item-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0,0,0,0.06); }
  .overview-card { padding: 28px 32px; }
  .quick-record, .record-list-section { padding: 24px; }
  .custom-row input { padding: 12px 16px; font-size: 15px; }
  .btn { padding: 12px 24px; font-size: 15px; }
}

/* --- 平板 (<768px) --- */
@media (max-width: 768px) {
  .app-container { max-width: 100%; padding: 12px 14px 32px; }
  .item-group-items { grid-template-columns: 1fr 1fr; gap: 6px; }
  .quick-item-btn { font-size: 13px; padding: 10px 6px; }
}

/* --- 手机 (<400px)：紧凑布局、大点击区域 --- */
@media (max-width: 400px) {
  .app-container { padding: 8px 10px 28px; }
  .total-number { font-size: 38px; }
  .app-header h1 { font-size: 20px; }
  .item-group-items { grid-template-columns: 1fr 1fr; gap: 5px; }
  .quick-items-water { grid-template-columns: repeat(3, 1fr); gap: 5px; }
  .cat-tab { padding: 7px 12px; font-size: 13px; }
  .quick-item-btn.solo-num { font-size: 16px; padding: 12px 4px; }
  .quick-item-btn { padding: 10px 6px; font-size: 12px; min-height: 44px; display: flex; flex-direction: column; justify-content: center; }
  .overview-card { padding: 16px; }
  .quick-record, .record-list-section { padding: 14px; }
  .record-volume { font-size: 16px; }
  .btn { padding: 10px 14px; font-size: 13px; }
  .btn-settings { width: 32px; height: 32px; top: 16px; }
  .sub-selector select { padding: 12px 14px; font-size: 14px; }
}