/* ============ IPMA PMC 学习系统样式 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --ink: #1c2333;
  --ink-2: #5a6478;
  --ink-3: #8b93a7;
  --line: #e3e8f0;
  --brand: #2452c4;
  --brand-soft: #e8eefc;
  --brand-dark: #183a8f;
  --green: #1e8e5a;
  --green-soft: #e2f5eb;
  --red: #c93a3a;
  --red-soft: #fbe9e9;
  --amber: #b97f10;
  --amber-soft: #fdf3dd;
  --purple: #6b46c1;
  --purple-soft: #f0eafb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(18, 30, 60, .07), 0 8px 24px rgba(18, 30, 60, .05);
  --sidebar-w: 240px;
}

html { font-size: 15px; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

.app { min-height: 100vh; }

/* ---- 侧边栏 ---- */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: #101a33;
  color: #cbd5ec;
  display: flex; flex-direction: column;
  z-index: 50;
}
.logo { display: flex; align-items: center; gap: 10px; padding: 20px 18px; border-bottom: 1px solid rgba(255,255,255,.08); }
.logo-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, #3b6ef0, #7c4fe0);
  color: #fff; font-weight: 800; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: .5px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.3; }
.logo-text strong { color: #fff; font-size: 15px; }
.logo-text span { font-size: 11.5px; color: #8fa0c9; }
.nav { padding: 12px 10px; flex: 1; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; margin-bottom: 2px;
  color: #b6c2de; text-decoration: none;
  border-radius: 8px; font-size: 14.5px;
  transition: background .15s;
}
.nav-item:hover { background: rgba(255,255,255,.07); color: #fff; }
.nav-item.active { background: var(--brand); color: #fff; font-weight: 600; }
.ni { width: 20px; text-align: center; }
.sidebar-foot { padding: 14px; border-top: 1px solid rgba(255,255,255,.08); }
.lang-switch { display: flex; gap: 0; margin-bottom: 12px; background: rgba(255,255,255,.08); border-radius: 8px; padding: 3px; }
.lang-btn {
  flex: 1; padding: 6px 0; border: none; background: transparent; color: #b6c2de;
  font-size: 13px; font-weight: 600; cursor: pointer; border-radius: 6px; font-family: inherit;
  transition: background .15s, color .15s;
}
.lang-btn.active { background: var(--brand); color: #fff; }

.topbar { display: none; }

/* ---- 主区 ---- */
.main { margin-left: var(--sidebar-w); padding: 28px 32px 60px; max-width: 1180px; }

h1.page-title { font-size: 24px; margin-bottom: 6px; }
.page-sub { color: var(--ink-2); margin-bottom: 24px; font-size: 14px; }

.card {
  background: var(--panel); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px; margin-bottom: 18px;
}
.card h2 { font-size: 17px; margin-bottom: 12px; }
.card h3 { font-size: 15px; margin: 14px 0 8px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: 9px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer;
  background: var(--brand); color: #fff;
  transition: filter .15s, background .15s;
  font-family: inherit;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-outline { background: #fff; color: var(--brand); border-color: var(--brand); }
.btn-ghost { background: transparent; color: inherit; border-color: rgba(160,170,200,.5); }
.btn-green { background: var(--green); }
.btn-red { background: var(--red); }
.btn-amber { background: var(--amber); }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 7px; }
.btn-lg { padding: 12px 26px; font-size: 15.5px; }

/* ---- 标签徽章 ---- */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.badge-perspective { background: var(--purple-soft); color: var(--purple); }
.badge-people { background: var(--amber-soft); color: var(--amber); }
.badge-practice { background: var(--brand-soft); color: var(--brand); }
.badge-green { background: var(--green-soft); color: var(--green); }
.badge-red { background: var(--red-soft); color: var(--red); }
.badge-gray { background: #eef1f6; color: var(--ink-2); }

/* ---- 统计块 ---- */
.stat {
  background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 20px;
}
.stat .stat-num { font-size: 28px; font-weight: 800; letter-spacing: -.5px; }
.stat .stat-label { color: var(--ink-2); font-size: 13px; margin-top: 2px; }

/* ---- 进度条 ---- */
.pbar { background: #e9edf5; border-radius: 999px; height: 10px; overflow: hidden; }
.pbar > i { display: block; height: 100%; border-radius: 999px; background: var(--brand); transition: width .4s; }
.pbar > i.green { background: var(--green); }
.pbar > i.amber { background: var(--amber); }
.pbar > i.purple { background: var(--purple); }

/* ---- 知识体系 ---- */
.domain-tabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.domain-tab {
  padding: 8px 18px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; cursor: pointer; font-size: 14px; font-weight: 600; color: var(--ink-2);
  font-family: inherit;
}
.domain-tab.active { background: var(--brand); border-color: var(--brand); color: #fff; }

.ce-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.ce-card {
  background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; cursor: pointer; border: 2px solid transparent;
  transition: border-color .15s, transform .15s;
}
.ce-card:hover { border-color: var(--brand); transform: translateY(-2px); }
.ce-card.learned { border-color: var(--green); }
.ce-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 6px; }
.ce-code { font-size: 12px; color: var(--ink-3); font-weight: 700; }
.ce-name { font-size: 16px; font-weight: 700; }
.ce-en { font-size: 12.5px; color: var(--ink-3); font-style: italic; }
.ce-brief { font-size: 13.5px; color: var(--ink-2); margin-top: 8px; }

/* 详情页 */
.detail-back { margin-bottom: 16px; }
.kp-list li, .kci-list li, .tip-list li { margin-bottom: 8px; }
.kp-list, .kci-list, .tip-list { padding-left: 22px; }
.kci-list li::marker { color: var(--brand); }
.exam-tips {
  background: var(--amber-soft); border-left: 4px solid var(--amber);
  padding: 14px 18px; border-radius: 8px; margin-top: 14px;
}
.exam-tips h3 { margin-top: 0; color: var(--amber); }
.def-box {
  background: var(--brand-soft); border-left: 4px solid var(--brand);
  padding: 14px 18px; border-radius: 8px; margin-bottom: 14px;
}

/* ---- 卡片(flashcard) ---- */
.fc-stage { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.flashcard {
  width: 100%; max-width: 640px; min-height: 300px;
  perspective: 1200px; cursor: pointer;
}
.fc-inner {
  position: relative; width: 100%; min-height: 300px;
  transform-style: preserve-3d; transition: transform .5s;
}
.flashcard.flipped .fc-inner { transform: rotateY(180deg); }
.fc-face {
  position: absolute; inset: 0; backface-visibility: hidden;
  background: var(--panel); border-radius: 16px; box-shadow: var(--shadow);
  padding: 30px; display: flex; flex-direction: column; justify-content: center;
  overflow-y: auto;
}
.fc-face.back { transform: rotateY(180deg); background: #fbfcff; }
.fc-q { font-size: 19px; font-weight: 700; text-align: center; }
.fc-a { font-size: 14.5px; }
.fc-hint { text-align: center; color: var(--ink-3); font-size: 12.5px; margin-top: 14px; }
.fc-controls { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.fc-meta { color: var(--ink-2); font-size: 13.5px; }

/* ---- 题目 ---- */
.q-card { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.q-meta { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.q-text { font-size: 16px; font-weight: 600; margin-bottom: 16px; white-space: pre-line; }
.opt {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  margin-bottom: 10px; cursor: pointer; transition: all .15s;
  background: #fff;
}
.opt:hover { border-color: var(--brand); background: var(--brand-soft); }
.opt.selected { border-color: var(--brand); background: var(--brand-soft); }
.opt.correct { border-color: var(--green); background: var(--green-soft); }
.opt.wrong { border-color: var(--red); background: var(--red-soft); }
.opt .opt-key { font-weight: 800; color: var(--brand); min-width: 20px; }
.opt.disabled { pointer-events: none; }
.explain {
  background: #f2f6ff; border-left: 4px solid var(--brand);
  padding: 14px 16px; border-radius: 8px; margin-top: 14px; font-size: 14px;
  white-space: pre-line;
}
.q-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 18px; gap: 10px; flex-wrap: wrap; }
.filter-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
select.sel {
  padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line);
  font-size: 14px; background: #fff; font-family: inherit; color: var(--ink);
}

/* ---- 案例 ---- */
.case-item {
  background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin-bottom: 14px; cursor: pointer; border: 2px solid transparent;
  transition: border-color .15s;
}
.case-item:hover { border-color: var(--brand); }
.case-title { font-size: 16.5px; font-weight: 700; margin-bottom: 4px; }
.case-tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.case-bg {
  background: #f8f9fc; border: 1px solid var(--line); border-radius: 10px;
  padding: 18px 20px; white-space: pre-line; font-size: 14.5px; margin-bottom: 18px;
}
.case-q {
  background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin-bottom: 16px;
}
.case-q-title { font-weight: 700; font-size: 15.5px; margin-bottom: 10px; }
.answer-area {
  width: 100%; min-height: 110px; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 12px; font-family: inherit; font-size: 14px; resize: vertical; color: var(--ink);
}
.answer-area:focus { outline: none; border-color: var(--brand); }
.model-answer {
  background: var(--green-soft); border-left: 4px solid var(--green);
  padding: 14px 18px; border-radius: 8px; margin-top: 12px;
  white-space: pre-line; font-size: 14px;
}
.model-answer h4 { color: var(--green); margin-bottom: 6px; }
.difficulty { color: var(--amber); font-size: 13px; letter-spacing: 2px; }

/* ---- 考试 ---- */
.exam-timer {
  position: sticky; top: 10px; z-index: 10;
  background: var(--ink); color: #fff; border-radius: 10px;
  padding: 10px 18px; display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; font-weight: 600;
}
.exam-timer.warn { background: var(--red); }
.exam-grid { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.exam-dot {
  width: 34px; height: 34px; border-radius: 8px; border: 1.5px solid var(--line);
  background: #fff; font-size: 12.5px; font-weight: 600; cursor: pointer; color: var(--ink-2);
  font-family: inherit;
}
.exam-dot.answered { background: var(--brand); border-color: var(--brand); color: #fff; }
.exam-dot.current { outline: 2.5px solid var(--amber); }
.exam-dot.right { background: var(--green); border-color: var(--green); color: #fff; }
.exam-dot.wrong2 { background: var(--red); border-color: var(--red); color: #fff; }
.score-ring {
  width: 140px; height: 140px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; font-size: 30px; font-weight: 800; color: #fff;
}

/* ---- 进度页 ---- */
.prog-row { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.prog-row .prog-label { width: 160px; font-size: 14px; font-weight: 600; flex-shrink: 0; }
.prog-row .pbar { flex: 1; }
.prog-row .prog-val { width: 70px; text-align: right; font-size: 13px; color: var(--ink-2); flex-shrink: 0; }

table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
table.tbl th, table.tbl td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
table.tbl th { color: var(--ink-2); font-size: 13px; font-weight: 600; }

.empty-tip { text-align: center; color: var(--ink-3); padding: 40px 0; }

.callout { background: var(--purple-soft); border-left: 4px solid var(--purple); padding: 14px 18px; border-radius: 8px; margin: 12px 0; font-size: 14px; }

/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); transition: transform .25s; }
  .sidebar.open { transform: translateX(0); }
  .topbar {
    display: flex; align-items: center; gap: 12px;
    position: sticky; top: 0; z-index: 40;
    background: #101a33; color: #fff; padding: 12px 16px;
  }
  .menu-toggle { background: none; border: none; color: #fff; font-size: 20px; cursor: pointer; }
  .topbar-title { font-weight: 700; font-size: 15px; }
  .main { margin-left: 0; padding: 18px 14px 60px; }
  .ce-list, .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .prog-row .prog-label { width: 110px; }
}
@media (min-width: 901px) and (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}