/* ==========================================================================
   上岸测评 · 复刻版 — 设计系统
   手账纸感 + 手绘描边（ink & paper），令牌取自原站 :root 实测值
   ========================================================================== */

:root {
  --paper: #f8f3e7;
  --card: #fdfaf2;
  --ink: #33291d;
  --ink-soft: #6f5f4b;
  --ink-accent: #9a4a12;
  --ink-accent-strong: #7c3a0c;
  --marker: #f6d76b;
  --line: #e2d5ba;
  --stroke: #9a4a12;
  --fill: #f1e0bd;
  --error: #bf4236;
  --success: #3c7a37;

  --font-sans: "Noto Sans SC", "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-display: "Plus Jakarta Sans", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-pen: "Drawably Pen", "Noto Sans SC", cursive;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 纸纹底 —— 多层柔和渐变模拟手账纸 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle at 12% 18%, rgba(214, 190, 148, 0.22) 0%, transparent 42%),
    radial-gradient(circle at 88% 8%, rgba(224, 198, 152, 0.18) 0%, transparent 38%),
    radial-gradient(circle at 62% 92%, rgba(206, 182, 140, 0.16) 0%, transparent 45%),
    repeating-linear-gradient(0deg, rgba(160, 138, 100, 0.035) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, rgba(160, 138, 100, 0.028) 0 1px, transparent 1px 5px);
}

#app { position: relative; z-index: 1; }

::selection { background: #b94222; color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cdbb97; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-accent); }

/* ========================== 布局 ========================== */
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 22px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(248, 243, 231, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1.5px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 0 10px;
  flex-wrap: wrap;
}

/* ========================== 品牌 ========================== */
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 44px; height: 44px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--ink);
}
.brand-sub {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

/* ========================== 导航 ========================== */
.nav { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; flex: 1; }

.nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 13px;
  border: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: var(--r-sm);
  transition: color 0.16s, background 0.16s;
  white-space: nowrap;
}
.nav-item:hover { color: var(--ink-accent); background: rgba(154, 74, 18, 0.07); }
.nav-item.active { color: var(--ink-accent-strong); }
.nav-item .nav-badge {
  font-size: 9.5px;
  font-weight: 700;
  padding: 1.5px 5px;
  border-radius: 4px;
  background: var(--marker);
  color: var(--ink-accent-strong);
  letter-spacing: 0.3px;
}
/* 选中态：手绘下划线 */
.nav-underline { position: absolute; left: 6px; right: 6px; bottom: -3px; height: 8px; pointer-events: none; }

/* ========================== 顶部统计 ========================== */
.top-stats { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.stat-pill { display: flex; flex-direction: column; line-height: 1.2; }
.stat-pill .k { font-size: 10px; color: var(--ink-soft); font-weight: 500; }
.stat-pill .v {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-accent-strong);
}

/* ========================== 按钮 ========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 15px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s, background 0.16s, border-color 0.16s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); border-color: var(--ink-accent); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--ink-accent);
  border-color: var(--ink-accent-strong);
  color: #fff;
}
.btn-primary:hover { background: var(--ink-accent-strong); }
.btn-sm { padding: 5.5px 11px; font-size: 12px; }
.btn-xs { padding: 3.5px 8px; font-size: 11px; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: rgba(154, 74, 18, 0.08); color: var(--ink-accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

/* ========================== 卡片 ========================== */
.card {
  position: relative;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px;
}
.card-title {
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 7px;
}

/* ========================== 概览四卡 ========================== */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 18px 0 16px;
}
.ov-card {
  position: relative;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  padding: 15px 16px;
  overflow: hidden;
}
.ov-card::after {
  content: "";
  position: absolute;
  right: -22px; top: -22px;
  width: 78px; height: 78px;
  border-radius: 50%;
  background: rgba(246, 215, 107, 0.20);
}
.ov-label { font-size: 11.5px; font-weight: 600; color: var(--ink-soft); letter-spacing: 0.4px; }
.ov-num {
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 600;
  color: var(--ink-accent-strong);
  line-height: 1.25;
  margin-top: 3px;
}
.ov-num small { font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-left: 3px; }
.ov-sub { font-size: 11.5px; color: var(--ink-soft); margin-top: 3px; }

/* ========================== 过滤区 ========================== */
.filter-row { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin-bottom: 11px; }
.filter-label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.chip {
  padding: 5px 12px;
  border: 1.5px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.16s;
  white-space: nowrap;
}
.chip:hover { border-color: var(--ink-accent); color: var(--ink-accent); }
.chip.active {
  background: var(--marker);
  border-color: var(--ink-accent);
  color: var(--ink-accent-strong);
  font-weight: 700;
}

select, input[type="text"], input[type="search"] {
  padding: 6.5px 11px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  font-family: var(--font-sans);
  font-size: 12.5px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.16s;
}
select:focus, input[type="text"]:focus, input[type="search"]:focus { border-color: var(--ink-accent); }
input::placeholder { color: #a8967c; }

/* 开关 */
.switch { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; user-select: none; }
.switch-track {
  position: relative;
  width: 36px; height: 19px;
  border-radius: 20px;
  background: #ddd0b6;
  border: 1.5px solid var(--line);
  transition: background 0.2s;
  flex-shrink: 0;
}
.switch.on .switch-track { background: var(--ink-accent); border-color: var(--ink-accent-strong); }
.switch-knob {
  position: absolute;
  top: 1.5px; left: 1.5px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--card);
  transition: transform 0.2s;
}
.switch.on .switch-knob { transform: translateX(17px); }
.switch-text { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); }

/* ========================== 题目卡 ========================== */
.q-head {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1.5px dashed var(--line);
  margin-bottom: 15px;
}
.q-index { font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--ink-accent-strong); }
.q-cat { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); }
.q-stars { display: flex; gap: 2px; margin-left: auto; }

.q-stem {
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink);
  margin-bottom: 18px;
  white-space: pre-wrap;
  letter-spacing: 0.2px;
}

.opt {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  width: 100%;
  text-align: left;
  padding: 12px 15px;
  margin-bottom: 9px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.16s;
}
.opt:hover { border-color: var(--ink-accent); background: #fdf6e8; }
.opt-key {
  flex-shrink: 0;
  width: 24px; height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  transition: all 0.16s;
}
.opt.picked { border-color: var(--ink-accent); background: #fdf3e2; }
.opt.picked .opt-key { background: var(--ink-accent); border-color: var(--ink-accent-strong); color: #fff; }
.opt.correct { border-color: var(--success); background: #eef7ec; }
.opt.correct .opt-key { background: var(--success); border-color: var(--success); color: #fff; }
.opt.wrong { border-color: var(--error); background: #fbeeec; }
.opt.wrong .opt-key { background: var(--error); border-color: var(--error); color: #fff; }
.opt[disabled] { cursor: default; }
.opt[disabled]:hover { transform: none; }

.q-hint { font-size: 12.5px; color: var(--ink-soft); margin: 14px 0 12px; font-style: italic; }

/* 解析框 */
.explain {
  margin-top: 16px;
  padding: 15px 17px;
  border: 1.5px dashed var(--ink-accent);
  border-radius: var(--r-sm);
  background: #fdf6e6;
}
.explain-title {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-accent-strong);
  margin-bottom: 7px;
  letter-spacing: 0.4px;
}
.explain-body { font-size: 13.5px; line-height: 1.9; color: var(--ink); white-space: pre-wrap; }

/* 题底导航 */
.q-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1.5px dashed var(--line);
}
.q-nav-mid { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); }

/* ========================== 两栏 ========================== */
.two-col { display: grid; grid-template-columns: 1fr 320px; gap: 18px; align-items: start; }
@media (max-width: 1080px) { .two-col { grid-template-columns: 1fr; } }
@media (max-width: 900px) { .overview-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .overview-grid { grid-template-columns: 1fr; } }

/* 进度条 */
.bar { height: 8px; border-radius: 20px; background: #ece0c8; overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 20px; background: var(--ink-accent); transition: width 0.4s; }

/* 列表行 */
.row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
}
.row:last-child { border-bottom: 0; }
.row-key { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-soft); flex-shrink: 0; }

/* 空状态 */
.empty { text-align: center; padding: 46px 20px; color: var(--ink-soft); font-size: 13.5px; }
.empty svg { display: block; margin: 0 auto 14px; }

/* 页脚 */
.footer {
  margin-top: 40px;
  padding: 20px 0 30px;
  border-top: 1.5px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--ink-soft);
}

/* 弹窗 */
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(51, 41, 29, 0.42);
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
  padding: 20px;
}
.modal {
  width: min(620px, 100%);
  max-height: 82vh;
  overflow: auto;
  background: var(--card);
  border: 2px solid var(--ink-accent);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: 0 18px 50px rgba(51, 41, 29, 0.28);
}
.modal-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-accent-strong);
  margin: 0 0 5px;
}
.modal-sub { font-size: 12.5px; color: var(--ink-soft); margin-bottom: 18px; }

/* 手写批注 */
.annotation {
  font-family: var(--font-pen);
  color: var(--ink-accent);
  font-size: 15px;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2.5px 8px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
  background: #f2e6cd;
  color: var(--ink-accent-strong);
}

/* 错题/收藏计数 */
.badge-count {
  display: inline-grid;
  place-items: center;
  min-width: 19px;
  height: 19px;
  padding: 0 5px;
  border-radius: 10px;
  background: var(--ink-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
}

/* 动效 */
@keyframes fadeUp { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp 0.32s ease both; }

@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin 1s linear infinite; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}