/* ============================================================
   Nanping 自定义样式 — 基于 Pico.css v2 classless
   ============================================================ */

/* ---- CSS 变量覆盖 ---- */
:root {
  --nanping-primary: #6B1C6C;
  --nanping-primary-hover: #4E1450;
  --nanping-gold: #6B1C6C;
  --nanping-gold-light: #C9A0CB;
  --nanping-danger: #8B2252;
  --nanping-success: #5E1675;
  --nanping-info: #6B1C6C;
  --nanping-nav-bg: #1A0A1C;
  --nanping-radius: 8px;

  /* 思源字体 */
  --nanping-font-sans: "Noto Sans SC", "思源黑体", "Source Han Sans SC", "PingFang SC",
    "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  --nanping-font-serif: "Noto Serif SC", "思源宋体", "Source Han Serif SC", "Noto Serif CJK SC",
    "STSong", "SimSun", "Songti SC", serif;
}

/* ---- 全局字体 ---- */

/* 覆盖 Pico.css 的字体变量，确保所有引用 var(--pico-font-family) 的元素也使用思源字体 */
:root {
  --pico-font-family: var(--nanping-font-sans);
  --pico-font-family-emoji: "Noto Sans SC", "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

html {
  font-family: var(--nanping-font-sans);
}

body {
  font-family: var(--nanping-font-sans);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 表单元素默认不继承 font-family，必须显式指定 */
input, button, select, textarea, optgroup, datalist {
  font-family: var(--nanping-font-sans);
}

p { line-height: 1.8; }

/* 标题适当紧凑 */
h1, h2, h3, h4, h5, h6 { line-height: 1.4; }

/* 标题使用宋体 */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--nanping-font-serif);
  font-weight: 700;
  letter-spacing: 0.02em;
}

h1 { font-size: 2rem; font-weight: 900; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.1rem; }

/* 代码保持等宽 */
code, pre, kbd, samp, .card-code, .header-code {
  font-family: "SF Mono", "Cascadia Code", "Fira Code", "JetBrains Mono",
    "Noto Sans SC", monospace;
}

/* ---- Material Symbols 图标基础样式 ---- */
.material-symbols-outlined {
  vertical-align: middle;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ---- 顶部导航栏 ---- */
.nanping-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.5rem;
  background: var(--nanping-nav-bg);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nanping-nav .nav-brand a {
  color: #fff;
  font-size: 1.2rem;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-family: var(--nanping-font-serif);
}

.nanping-nav .nav-links {
  display: flex;
  gap: 1.2rem;
  align-items: center;
}

.nanping-nav .nav-links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.nanping-nav .nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nanping-nav .nav-links .nav-logout {
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
}

.nanping-nav .nav-links .nav-logout:hover {
  color: #C08FC9;
}

/* ---- Hero 区域 ---- */
.hero {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.hero h1 {
  font-size: 2.2rem;
  margin-bottom: 0.4rem;
  color: var(--nanping-nav-bg);
}

.hero p {
  color: #666;
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ---- 搜索区域 ---- */
.search-section {
  max-width: 720px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
}

.search-section form {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.search-section form input {
  flex: 1;
  min-width: 140px;
}

.search-section form button {
  flex-shrink: 0;
}

.extension-hint {
  text-align: center;
  font-size: 1.05rem;
  color: #222;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.extension-hint a {
  color: var(--nanping-primary);
  text-decoration: none;
  font-weight: 500;
}

.extension-hint a:hover {
  text-decoration: underline;
}

.info-links {
  text-align: center;
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 0.8rem;
}

.info-links a {
  color: var(--nanping-primary);
  text-decoration: none;
}

.info-links a:hover {
  text-decoration: underline;
}

/* ---- 课程卡片网格 ---- */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}

.course-card {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--pico-muted-border-color, #ddd);
  border-radius: var(--nanping-radius);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s, transform 0.15s, border-color 0.2s;
  background: var(--pico-card-background-color, #fff);
  cursor: pointer;
}

.course-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
  border-color: var(--nanping-primary);
}

.course-card .card-code {
  font-size: 0.75rem;
  color: #888;
  font-family: monospace;
}

.course-card .card-name {
  font-size: 1rem;
  font-weight: 600;
  margin: 0.15rem 0 0.3rem;
  color: #222;
  font-family: var(--nanping-font-serif);
}

.course-card .card-meta {
  font-size: 0.82rem;
  color: #666;
  margin-bottom: 0.35rem;
}

.course-card .card-semester {
  font-size: 0.78rem;
  color: var(--nanping-primary);
  margin-bottom: 0.2rem;
}

.course-card .card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.35rem;
  font-size: 0.82rem;
}

.course-card .card-footer .review-count {
  color: #888;
  font-size: 0.78rem;
}

/* ---- 课程详情头部 ---- */
.course-header {
  background: var(--pico-card-background-color, #fff);
  border-left: 4px solid var(--nanping-primary);
  padding: 1.5rem;
  border-radius: var(--nanping-radius);
  margin-bottom: 2rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.course-header h1 {
  margin-bottom: 0.2rem;
}

.course-header .header-code {
  font-family: monospace;
  color: #888;
  font-size: 0.9rem;
}

.course-header .header-meta {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  color: #555;
  font-size: 0.95rem;
}

.course-header .header-stats {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  margin-top: 0.6rem;
}

.course-header .header-semesters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.course-header .header-semesters .semesters-label {
  font-size: 0.9rem;
  color: #888;
  margin-right: 0.1rem;
}

.course-header .header-semesters .semester-badge {
  display: inline-block;
  background: var(--nanping-primary);
  color: #fff;
  font-size: 0.8rem;
  padding: 0.15rem 0.55rem;
  border-radius: 12px;
  line-height: 1.5;
  white-space: nowrap;
}

.course-header .header-avg {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--nanping-gold);
}

/* ---- 评价列表网格 ---- */
#review-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 0.7rem;
}

/* ---- 评价卡片 ---- */
.review-card {
  border: 1px solid var(--pico-muted-border-color, #ddd);
  border-left: 3px solid var(--nanping-primary);
  border-radius: var(--nanping-radius);
  padding: 0.75rem 1rem;
  margin-bottom: 0;
  background: var(--pico-card-background-color, #fff);
}

.review-card.is-anonymous {
  border-left-color: #aaa;
}

.review-card .review-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.35rem;
}

.review-card .review-content {
  font-family: var(--nanping-font-sans);
  font-weight: 600;
  line-height: 1.75;
  font-size: 0.95rem;
  color: #333;
  white-space: pre-wrap;
  word-break: break-word;
}

.review-card .review-footer {
  margin-top: 0.45rem;
  font-size: 0.78rem;
  color: #888;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.review-card .review-footer .semester-badge {
  display: inline-block;
  background: #F3EAF5;
  color: #6B1C6C;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

/* ---- 星星评分展示 ---- */
.star-rating {
  display: inline-flex;
  gap: 2px;
  color: var(--nanping-gold);
  line-height: 1;
}

.star-rating .material-symbols-outlined {
  font-size: 1.2rem;
}

.star-rating .star-filled {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.star-rating .star-empty {
  color: #ccc;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ---- 星星评分输入 ---- */
.star-input {
  display: inline-flex;
  gap: 4px;
  cursor: pointer;
  user-select: none;
}

.star-input .star {
  color: #ccc;
  transition: color 0.1s;
  display: inline-flex;
  align-items: center;
}

.star-input .star .material-symbols-outlined {
  font-size: 2rem;
}

.star-input .star.active,
.star-input .star.hover {
  color: var(--nanping-gold);
}

.star-input .star.active .material-symbols-outlined,
.star-input .star.hover .material-symbols-outlined {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ---- Toast 通知 ---- */
.toast-container {
  position: fixed;
  bottom: 1.2rem;
  right: 1.2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  padding: 0.7rem 1.2rem;
  border-radius: var(--nanping-radius);
  color: #fff;
  font-size: 0.92rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation: toast-in 0.3s ease-out;
  pointer-events: auto;
  max-width: 360px;
  word-break: break-word;
}

.toast.toast-removing {
  animation: toast-out 0.25s ease-in forwards;
}

.toast.toast-success {
  background: var(--nanping-success);
}

.toast.toast-error {
  background: var(--nanping-danger);
}

.toast.toast-info {
  background: var(--nanping-info);
}

@keyframes toast-in {
  from {
    transform: translateX(120%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toast-out {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(120%);
    opacity: 0;
  }
}

/* ---- 加载动画 ---- */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  gap: 0.8rem;
  color: #888;
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--pico-muted-border-color, #ddd);
  border-top-color: var(--nanping-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---- 按钮加载态 ---- */
button.is-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.75;
}

button .btn-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.5s linear infinite;
  vertical-align: middle;
  margin-right: 0.3rem;
}

button.is-loading .btn-spinner {
  display: inline-block;
}

/* ---- 空状态 ---- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #999;
}

.empty-state .empty-icon {
  margin-bottom: 0.5rem;
}

.empty-state .empty-icon .material-symbols-outlined {
  font-size: 3rem;
  color: #bbb;
}

.empty-state p {
  font-size: 0.95rem;
}

/* ---- 表单辅助 ---- */
.field-error {
  color: var(--nanping-danger);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}

.field-hint {
  color: #999;
  font-size: 0.82rem;
}

.char-counter {
  text-align: right;
  font-size: 0.8rem;
  color: #999;
  margin-top: 0.2rem;
}

.char-counter.near-limit {
  color: #6B1C6C;
}

.char-counter.at-limit {
  color: var(--nanping-danger);
}

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  margin-top: 1.5rem;
  padding: 0.5rem 0;
}

.pagination .page-info {
  font-size: 0.9rem;
  color: #666;
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---- 添加评价表单区域 ---- */
.add-review-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--pico-muted-border-color, #ddd);
}

.add-review-section h3 {
  margin-bottom: 1rem;
}

.login-prompt {
  text-align: center;
  padding: 1.5rem;
  background: var(--pico-card-background-color, #fff);
  border-radius: var(--nanping-radius);
  border: 1px dashed var(--pico-muted-border-color, #ddd);
}

/* ---- 我的评价页面 ---- */
.my-review-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.my-review-card .review-info {
  flex: 1;
  min-width: 0;
}

.my-review-card .review-info .course-link {
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
}

.my-review-card .review-info .course-link:hover {
  text-decoration: underline;
}

.my-review-card .review-actions {
  flex-shrink: 0;
}

.my-review-card .review-actions .btn-delete {
  background: none;
  border: 1px solid var(--nanping-danger);
  color: var(--nanping-danger);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.2s, color 0.2s;
}

.my-review-card .review-actions .btn-delete:hover {
  background: var(--nanping-danger);
  color: #fff;
}

/* ---- 响应式：移动端 ---- */
@media (max-width: 768px) {
  .nanping-nav {
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
  }

  .nanping-nav .nav-links {
    gap: 0.6rem;
    font-size: 0.88rem;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .search-section form {
    flex-direction: column;
  }

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

  #review-list {
    grid-template-columns: 1fr;
  }

  .course-header .header-meta {
    flex-direction: column;
    gap: 0.3rem;
    align-items: flex-start;
  }

  .star-input .star .material-symbols-outlined {
    font-size: 1.6rem;
  }

  .toast-container {
    left: 1rem;
    right: 1rem;
    bottom: 0.8rem;
  }

  .toast {
    max-width: 100%;
  }
}

/* ---- 页脚备案 ---- */
.nanping-footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  font-size: 0.82rem;
  color: #999;
}

.nanping-footer a {
  color: #999;
  text-decoration: none;
}

.nanping-footer a:hover {
  color: #666;
  text-decoration: underline;
}

/* ---- 下载页面 ---- */
.download-hero {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

.download-hero h1 {
  font-size: 2rem;
  margin-bottom: 0.3rem;
}

.download-hero p {
  color: #666;
  max-width: 520px;
  margin: 0 auto;
}

.download-section {
  text-align: center;
  padding: 1rem 0;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.8rem;
  background: var(--nanping-primary);
  color: #fff !important;
  border-radius: var(--nanping-radius);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 600;
  transition: background 0.2s;
}

.download-btn:hover {
  background: var(--nanping-primary-hover);
  text-decoration: none !important;
}

details {
  margin-bottom: 1rem;
  border: 1px solid var(--pico-muted-border-color, #ddd);
  border-radius: var(--nanping-radius);
  padding: 0.8rem 1rem;
}

details summary {
  cursor: pointer;
  font-weight: 600;
}

details[open] {
  padding-bottom: 1rem;
}

details[open] summary {
  margin-bottom: 0.5rem;
}