/* ========================================
   统御IP项目管理 · 全局样式
   设计原则：苹果风骨架 + 统御品牌色调
   结构原则：CSS变量统一管理，改一处不影响全局
   ======================================== */

/* === 品牌变量（改这里就改全局） === */
:root {
  /* 品牌色 - 食养东方韵 */
  --brand: #1a1a2e;
  --brand-accent: #0f7b5c;
  --brand-gold: #c9a961;
  
  /* 功能色 */
  --primary: #0f7b5c;
  --primary-light: rgba(15,123,92,0.08);
  --primary-hover: #0d6a4f;
  --success: #34c759;
  --warning: #ff9500;
  --danger: #ff3b30;
  --info: #5ac8fa;
  
  /* 中性色 */
  --bg: #f8f8fa;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(255,255,255,0.72);
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;
  --border: #e5e5ea;
  --border-light: #f0f0f2;
  
  /* 布局 */
  --sidebar-w: 248px;
  --bottom-nav-h: 60px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-glow: 0 4px 20px rgba(15,123,92,0.15);
  
  /* 动画 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.3s;
  --duration-fast: 0.15s;
  
  /* 字体 */
  --font: -apple-system, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 17px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-size-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

.hidden { display: none !important; }

/* === 通用动画 === */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes slideDown {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* === 骨架屏 === */
.skeleton {
  background: linear-gradient(90deg, #f0f0f2 25%, #e8e8ed 50%, #f0f0f2 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}
.skeleton-text { height: 14px; margin-bottom: 8px; }
.skeleton-card { height: 80px; border-radius: var(--radius); }

/* ==============================
   登录页
   ============================== */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #0f7b5c 100%);
  padding: 24px;
  animation: fadeIn 0.5s var(--ease);
}
.login-card {
  width: 100%;
  max-width: 380px;
  text-align: center;
  animation: slideUp 0.6s var(--ease-spring);
}
.login-logo {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  color: #fff;
  margin-bottom: 6px;
}
.login-tagline {
  color: rgba(255,255,255,0.6);
  font-size: var(--font-size-sm);
  margin-bottom: 48px;
  letter-spacing: 1px;
}
.login-form {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}
.login-form input {
  width: 100%;
  height: 50px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 0 16px;
  font-size: 16px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  margin-bottom: 12px;
  transition: all var(--duration) var(--ease);
}
.login-form input::placeholder { color: rgba(255,255,255,0.4); }
.login-form input:focus {
  outline: none;
  border-color: var(--brand-gold);
  background: rgba(255,255,255,0.12);
}
.login-error {
  color: rgba(255,59,48,0.9);
  font-size: var(--font-size-sm);
  margin-top: 8px;
  min-height: 18px;
}

/* ==============================
   按钮
   ============================== */
.btn {
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: all var(--duration) var(--ease);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  height: 50px;
  width: 100%;
  background: var(--brand-gold);
  color: #fff;
}
.btn-primary:hover { background: #b89952; }
.btn-secondary {
  height: 38px;
  padding: 0 18px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: var(--font-size-sm);
}
.btn-secondary:hover { background: rgba(15,123,92,0.14); }
.btn-ghost {
  height: 38px;
  padding: 0 18px;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}
.btn-ghost:hover { background: var(--border-light); }
.btn-danger {
  height: 38px;
  padding: 0 18px;
  background: rgba(255,59,48,0.08);
  color: var(--danger);
  font-size: var(--font-size-sm);
}

/* ==============================
   App 骨架
   ============================== */
.app {
  display: flex;
  min-height: 100vh;
  animation: fadeIn 0.4s var(--ease);
}

/* === 侧边栏 (PC) === */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}
.sidebar-header {
  padding: 24px 24px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}
.sidebar-logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.sidebar-nav {
  flex: 1;
  padding: 8px 12px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.nav-section-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 16px 12px 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--duration-fast) var(--ease);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}
.nav-item:hover:not(.active) {
  background: rgba(0,0,0,0.04);
  color: var(--text);
}
.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.nav-item svg { flex-shrink: 0; }
.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
}
.logout-btn { color: var(--danger); }

/* === 主内容区 === */
.main-content {
  flex: 1;
  padding: 32px 40px;
  padding-bottom: calc(var(--bottom-nav-h) + 32px);
  max-width: 1280px;
  margin-left: var(--sidebar-w);
  min-width: 0;
}

/* === 底部导航 (手机) === */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-h);
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid var(--border);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-tertiary);
  font-size: 10px;
  font-weight: 500;
  transition: color var(--duration-fast) var(--ease);
}
.bottom-nav-item.active { color: var(--primary); }
.bottom-nav-item:active { transform: scale(0.92); }

/* === 浮动按钮 === */
.fab {
  position: fixed;
  bottom: calc(var(--bottom-nav-h) + 20px);
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, #0d6a4f 100%);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  z-index: 50;
  transition: transform var(--duration) var(--ease-spring);
}
.fab:active { transform: scale(0.88) rotate(90deg); }

/* ==============================
   页面通用组件
   ============================== */
.page {
  animation: slideUp 0.3s var(--ease);
}
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}
.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.8px;
}
.page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 2px;
}

/* === 卡片 === */
.card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  transition: box-shadow var(--duration) var(--ease);
}
.card:hover {
  box-shadow: var(--shadow);
}
.card-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

/* === KPI 卡片 === */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.kpi-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}
.kpi-card:hover::before { opacity: 1; }
.kpi-value {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 4px;
  line-height: 1.1;
}
.kpi-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}
.kpi-trend {
  font-size: var(--font-size-xs);
  font-weight: 700;
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.kpi-trend.up { color: var(--success); }
.kpi-trend.down { color: var(--danger); }

/* === 状态徽章 === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.badge-pending { background: rgba(255,149,0,0.10); color: var(--warning); }
.badge-progress { background: rgba(15,123,92,0.10); color: var(--primary); }
.badge-done { background: rgba(52,199,89,0.10); color: var(--success); }
.badge-published { background: rgba(52,199,89,0.10); color: var(--success); }

/* === 标签 === */
.tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--border-light);
  color: var(--text-secondary);
  font-weight: 500;
}

/* === 列表项 === */
.list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: padding-left var(--duration-fast) var(--ease);
}
.list-item:hover { padding-left: 6px; }
.list-item:last-child { border-bottom: none; }
.list-item-content { flex: 1; min-width: 0; }
.list-item-title {
  font-size: var(--font-size-base);
  font-weight: 500;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* === 选题卡片 === */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.topic-card {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: all var(--duration) var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.topic-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
  transform: translateY(-1px);
}
.topic-number {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, #0d6a4f 100%);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.topic-info { flex: 1; min-width: 0; }
.topic-title { font-size: var(--font-size-base); font-weight: 600; margin-bottom: 8px; }
.topic-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }

/* === 日历 === */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.calendar-header {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 0;
}
.calendar-day {
  aspect-ratio: 1;
  border-radius: 10px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-base);
  font-weight: 500;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  min-height: 52px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  position: relative;
}
.calendar-day:empty { background: transparent; box-shadow: none; cursor: default; }
.calendar-day:hover:not(:empty) {
  box-shadow: var(--shadow);
  transform: scale(1.05);
}
.calendar-day.today {
  background: var(--primary);
  color: #fff;
}
.calendar-day.has-task::after {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-gold);
  margin-top: 3px;
}
.calendar-day.today.has-task::after { background: #fff; }

/* === 表单 === */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: var(--font-size-base);
  background: var(--bg-elevated);
  transition: border-color var(--duration) var(--ease);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.form-textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.7;
}

/* === 弹窗 === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.2s var(--ease);
}
.modal-sheet {
  background: var(--bg-elevated);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
  animation: slideUpModal 0.35s var(--ease-spring);
}
@keyframes slideUpModal {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
}
.modal-close {
  background: var(--border-light);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 16px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease);
}
.modal-close:hover {
  background: var(--border);
  color: var(--text);
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: calc(var(--bottom-nav-h) + 80px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  padding: 12px 24px;
  border-radius: 100px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration) var(--ease);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === 空状态 === */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-tertiary);
}
.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  opacity: 0.4;
}
.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.empty-state-desc {
  font-size: var(--font-size-sm);
}

/* === 素材卡片 === */
.material-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 12px;
  transition: all var(--duration) var(--ease);
}
.material-card:hover { box-shadow: var(--shadow); }
.material-check {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2.5px solid var(--border);
  flex-shrink: 0;
  cursor: pointer;
  transition: all var(--duration) var(--ease-spring);
  display: flex;
  align-items: center;
  justify-content: center;
}
.material-check:hover { border-color: var(--primary); }
.material-check.done {
  background: var(--success);
  border-color: var(--success);
}
.material-check.done::after {
  content: '';
  width: 7px;
  height: 11px;
  border: 2px solid #fff;
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

/* === 视频链接卡片 === */
.video-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 12px;
  display: block;
  transition: all var(--duration) var(--ease);
  border: 1px solid transparent;
}
.video-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
  transform: translateY(-1px);
}
.video-card:active { transform: scale(0.98); }
.video-card-title { font-size: var(--font-size-base); font-weight: 600; margin-bottom: 10px; }
.video-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.video-card-stats { display: flex; gap: 16px; font-size: var(--font-size-sm); color: var(--text-secondary); }
.video-card-link { color: var(--primary); font-size: var(--font-size-sm); font-weight: 600; }

/* === 加载状态 === */
.loading-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  padding: 40px;
}
.loading-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-tertiary);
  animation: pulse 1.4s infinite ease-in-out;
}
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

/* ==============================
   响应式
   ============================== */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 0px;
  }
  .sidebar { display: none; }
  .bottom-nav { display: flex; }
  .main-content {
    margin-left: 0;
    padding: 20px 16px;
    padding-bottom: calc(var(--bottom-nav-h) + 24px);
  }
  .page-title { font-size: var(--font-size-xl); }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .kpi-value { font-size: 26px; }
  .kpi-card { padding: 18px; }
  .calendar-day { min-height: 44px; font-size: var(--font-size-sm); }
  .modal-overlay { align-items: flex-end; }
  .modal-sheet { border-radius: var(--radius-xl) var(--radius-xl) 0 0; width: 100%; }
  .fab { display: flex; }
  .card { padding: 18px; }
  .page-header { flex-wrap: wrap; gap: 12px; }
}

@media (min-width: 769px) {
  .bottom-nav { display: none; }
  .fab { display: none; }
}

@media (min-width: 1024px) {
  .kpi-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1440px) {
  .main-content { max-width: 1400px; }
}