/* ============================================
   CodeCal 现代化日历样式
   融合复古风格与现代布局
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* 主色调 - 复古风格 */
  --primary-color: #2B2D42;
  --accent-color: #FF4D6D;
  --primary-hover: #FF4D6D;

  /* 背景色 */
  --bg-primary: #F8F9FA;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;

  /* 文字颜色 */
  --text-primary: #2B2D42;
  --text-secondary: #666;
  --text-tertiary: #888;

  /* 边框与分隔 - 复古硬边框 */
  --border-color: #000;
  --divider-color: #e0e0e0;

  /* 卡片阴影 - 复古硬边框风格 */
  --shadow-sm: 3px 3px 0px #000;
  --shadow-md: 5px 5px 0px #000;
  --shadow-lg: 7px 7px 0px #000;
  --shadow-xl: 10px 10px 0px #000;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* 过渡动画 */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;

  /* 平台颜色 */
  --platform-codeforces: #3b82f6;
  --platform-leetcode: #f97316;
  --platform-nowcoder: #06b6d4;
  --platform-luogu: #22c55e;
  --platform-atcoder: #a855f7;

  /* 侧边栏宽度 */
  --sidebar-width: 320px;
}

/* Dark Theme */
[data-theme="dark"] {
  --primary-color: #FF4D6D;
  --bg-primary: #1A1B2E;
  --bg-secondary: #2B2D42;
  --bg-tertiary: #1A1B2E;
  --text-primary: #E9ECEF;
  --text-secondary: #A0A0A0;
  --text-tertiary: #888;
  --border-color: #444;
  --divider-color: #333;

  /* 深色模式阴影 */
  --shadow-sm: 3px 3px 0px #444;
  --shadow-md: 5px 5px 0px #444;
  --shadow-lg: 7px 7px 0px #444;
  --shadow-xl: 10px 10px 0px #444;
}

/* ---------- 基础样式重置 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  padding: 0;
}

/* ---------- 顶部导航栏 ---------- */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-bottom: 3px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 0px var(--border-color);
}

.top-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-color);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 3px 3px 0px var(--border-color);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 侧边栏切换按钮 */
.sidebar-btn {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: 3px 3px 0px var(--border-color);
}

.sidebar-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color);
  background: var(--accent-color);
  color: white;
}

/* 主题切换按钮 */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition-fast);
  box-shadow: 3px 3px 0px var(--border-color);
}

.theme-toggle:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color);
}

/* ---------- 导航切换器 ---------- */
.view-switcher {
  display: flex;
  gap: 12px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-link {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  border: 2px solid var(--border-color);
  background: var(--bg-secondary);
  box-shadow: 3px 3px 0px var(--border-color);
}

.nav-link:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color);
}

.nav-link.active {
  background: var(--accent-color);
  color: white;
  border-color: #000;
}

/* ---------- 布局容器 ---------- */
.modern-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  gap: 0;
  min-height: calc(100vh - 80px);
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  width: 0;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: hidden;
  transition: width 0.35s ease, margin 0.35s ease;
  margin-right: -20px;
}

.sidebar.expanded {
  width: var(--sidebar-width);
  margin-right: 0;
}

/* 平台筛选 */
.platform-filters {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 2px solid var(--border-color);
  box-shadow: 5px 5px 0px var(--border-color);
}

.sidebar-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.platform-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.platform-filter-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  box-shadow: 3px 3px 0px var(--border-color);
}

.platform-filter-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color);
}

.platform-filter-btn.active {
  background: var(--accent-color);
  color: white;
}

.platform-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
}

.platform-filter-btn.active .platform-dot {
  background: white;
}

/* 即将开始比赛 */
.upcoming-contests {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 2px solid var(--border-color);
  box-shadow: 5px 5px 0px var(--border-color);
  flex: 1;
  overflow-y: auto;
  max-height: 500px;
}

.upcoming-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.upcoming-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  transition: all var(--transition-fast);
  cursor: pointer;
  box-shadow: 3px 3px 0px var(--border-color);
}

.upcoming-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color);
}

.upcoming-time {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  padding: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.upcoming-day {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.upcoming-month {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.upcoming-info {
  flex: 1;
  min-width: 0;
}

.upcoming-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.upcoming-platform {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---------- 主日历区域 ---------- */
.main-content {
  flex: 1;
  min-width: 0;
}

.calendar-wrapper {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border-color);
  box-shadow: 5px 5px 0px var(--border-color);
  overflow: hidden;
  margin-left: 16px;
}

/* FullCalendar 样式重写 */
.fc {
  --fc-border-color: var(--border-color);
  --fc-button-bg-color: var(--bg-tertiary);
  --fc-button-border-color: var(--border-color);
  --fc-button-text-color: var(--text-primary);
  --fc-button-hover-bg-color: var(--accent-color);
  --fc-button-hover-border-color: var(--border-color);
  --fc-button-hover-text-color: white;
  --fc-button-active-bg-color: var(--accent-color);
  --fc-button-active-border-color: var(--border-color);
  --fc-today-bg-color: rgba(255, 77, 109, 0.1);
  --fc-page-bg-color: var(--bg-secondary);
  --fc-neutral-bg-color: var(--bg-tertiary);
  --fc-list-event-hover-bg-color: var(--bg-tertiary);
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 头部工具栏 */
.fc .fc-toolbar {
  padding: 20px 24px;
  margin-bottom: 0;
}

.fc .fc-toolbar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.fc .fc-button {
  padding: 8px 16px;
  border-radius: var(--radius-md) !important;
  font-weight: 600;
  font-size: 0.85rem;
  border: 2px solid var(--border-color) !important;
  box-shadow: 3px 3px 0px var(--border-color) !important;
  transition: all var(--transition-fast);
}

.fc .fc-button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0px var(--border-color) !important;
}

.fc .fc-button-active {
  background: var(--accent-color) !important;
  border-color: var(--border-color) !important;
  color: white !important;
}

/* 按钮组 */
.fc .fc-button-group {
  gap: 4px;
}

.fc .fc-button-group > .fc-button {
  border-radius: var(--radius-md) !important;
}

/* 今日按钮 */
.fc .fc-today-button {
  background: var(--bg-secondary) !important;
  border: 2px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  box-shadow: 3px 3px 0px var(--border-color) !important;
}

.fc .fc-today-button:hover {
  background: var(--accent-color) !important;
  color: white !important;
}

/* 星期/日期头部 */
.fc .fc-col-header-cell {
  padding: 12px 0;
  background: var(--bg-tertiary);
  border-bottom: 2px solid var(--border-color);
}

.fc .fc-col-header-cell-cushion {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
}

/* 单元格 */
.fc .fc-daygrid-day {
  transition: background-color var(--transition-fast);
  border: 1px solid var(--border-color);
}

.fc .fc-daygrid-day:hover {
  background: var(--bg-tertiary);
}

.fc .fc-daygrid-day-number {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 8px;
  font-weight: 600;
}

.fc .fc-day-today {
  background: rgba(255, 77, 109, 0.1) !important;
}

.fc .fc-day-today .fc-daygrid-day-number {
  color: var(--accent-color);
  font-weight: 700;
}

.fc .fc-day-other .fc-daygrid-day-number {
  color: var(--text-tertiary);
  opacity: 0.5;
}

/* 周视图时间轴 */
.fc .fc-timegrid-axis {
  background: var(--bg-tertiary);
}

.fc .fc-timegrid-axis-cushion {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.fc .fc-timegrid-slot {
  height: 48px;
}

.fc .fc-timegrid-slot-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* 更多链接 */
.fc .fc-daygrid-more-link {
  font-size: 0.75rem;
  color: var(--accent-color);
  font-weight: 600;
}

/* 当前时间指示器 */
.fc .fc-timegrid-now-indicator-line {
  border-color: var(--accent-color);
}

.fc .fc-timegrid-now-indicator-arrow {
  border-color: var(--accent-color);
  border-top-color: transparent !important;
  border-bottom-color: transparent !important;
}

/* ---------- 事件卡片样式 ---------- */
.fc-event {
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
}

/* 事件内容容器 */
.contest-event {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-left: 4px solid var(--accent-color);
  transition: all var(--transition-fast);
  cursor: pointer;
  overflow: hidden;
  box-shadow: 2px 2px 0px var(--border-color);
}

.contest-event:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--border-color);
}

/* 平台标签 */
.event-platform {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.65rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.event-platform.codeforces { background: var(--platform-codeforces); }
.event-platform.leetcode { background: var(--platform-leetcode); }
.event-platform.nowcoder { background: var(--platform-nowcoder); }
.event-platform.luogu { background: var(--platform-luogu); }
.event-platform.atcoder { background: var(--platform-atcoder); }

/* 事件标题 */
.event-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 多日赛事 */
.fc-daygrid-event-dot {
  display: none;
}

.fc .fc-event-main {
  padding: 2px 4px;
}

/* ---------- 比赛详情弹窗 ---------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 480px;
  width: 90%;
  border: 3px solid var(--border-color);
  box-shadow: 10px 10px 0px var(--border-color);
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border-color);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition-fast);
  box-shadow: 2px 2px 0px var(--border-color);
}

.modal-close:hover {
  background: var(--accent-color);
  color: white;
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  border: 2px solid var(--border-color);
  background: var(--bg-tertiary);
  box-shadow: 2px 2px 0px var(--border-color);
}

.modal-label {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.modal-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
}

.modal-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px;
  background: var(--accent-color);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  border: 2px solid var(--border-color);
  box-shadow: 4px 4px 0px var(--border-color);
  transition: all var(--transition-fast);
  margin-top: 8px;
}

.modal-link:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--border-color);
}

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

/* ---------- Toast 提示 ---------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--text-primary);
  color: var(--bg-secondary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid var(--border-color);
  box-shadow: 4px 4px 0px var(--border-color);
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state-text {
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

/* ---------- 动画效果 ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calendar-wrapper {
  animation: fadeInUp 0.4s ease-out;
}

.sidebar > * {
  animation: fadeInUp 0.4s ease-out;
}

.sidebar > *:nth-child(2) {
  animation-delay: 0.1s;
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1200px) {
  :root {
    --sidebar-width: 280px;
  }
}

@media (max-width: 992px) {
  .modern-container {
    flex-direction: column;
    padding: 16px;
  }

  .sidebar {
    width: 100%;
    flex-direction: row;
    margin-right: 0;
  }

  .sidebar.expanded {
    width: 100%;
    margin-right: 0;
  }

  .platform-filters {
    flex: 1;
  }

  .upcoming-contests {
    display: none;
  }

  .fc .fc-toolbar {
    flex-direction: column;
    gap: 12px;
  }

  .fc .fc-toolbar-title {
    order: -1;
  }
}

@media (max-width: 768px) {
  .top-bar {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 12px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .view-switcher {
    order: 3;
    width: 100%;
    justify-content: center;
    position: static;
    transform: none;
  }

  .nav-link {
    flex: 1;
    text-align: center;
    padding: 10px 16px;
  }

  .platform-filters {
    padding: 16px;
  }

  .platform-list {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .platform-filter-btn {
    flex: 1;
    min-width: calc(50% - 4px);
    justify-content: center;
  }

  .main-content {
    min-width: 0;
  }

  .calendar-wrapper {
    margin: 0 0 16px 0;
  }

  .top-left {
    gap: 8px;
  }

  .sidebar-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  .fc .fc-toolbar {
    padding: 16px;
  }

  .fc .fc-button {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .contest-event {
    padding: 2px 4px;
  }

  .event-platform {
    display: none;
  }

  .event-title {
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .modern-container {
    padding: 12px;
  }

  .sidebar {
    flex-direction: column;
  }

  .platform-filter-btn {
    min-width: auto;
    flex: none;
  }

  .fc .fc-daygrid-day-number {
    padding: 4px;
    font-size: 0.8rem;
  }

  .modal-content {
    padding: 20px;
  }
}