/* ===== 系统分析师 10 天冲刺 · 样式 ===== */
:root {
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --card-2: #f8fafc;
  --text: #1e2433;
  --text-soft: #5b6577;
  --text-mute: #8b94a7;
  --line: #e6eaf2;
  --line-strong: #d5dbe8;
  --primary: #4f46e5;
  --primary-soft: #eef0ff;
  --primary-ink: #3730c4;
  --accent: #0ea5a5;
  --accent-soft: #e6f7f7;
  --warn: #d97706;
  --warn-soft: #fef3e2;
  --danger: #dc2626;
  --danger-soft: #fdecec;
  --ok: #16a34a;
  --ok-soft: #e8f7ee;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 8px 24px -12px rgba(16,24,40,.18);
  --shadow-sm: 0 1px 2px rgba(16,24,40,.06);
  --radius: 14px;
  --radius-sm: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
[data-theme="dark"] {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --card: #171d26;
  --card-2: #1d242f;
  --text: #e8ecf3;
  --text-soft: #aab3c2;
  --text-mute: #78828f;
  --line: #262e3a;
  --line-strong: #333d4c;
  --primary: #7c7bff;
  --primary-soft: #23244a;
  --primary-ink: #b7b6ff;
  --accent: #2dd4bf;
  --accent-soft: #12302f;
  --warn: #fbbf24;
  --warn-soft: #33280f;
  --danger: #f87171;
  --danger-soft: #3a1d1d;
  --ok: #4ade80;
  --ok-soft: #163223;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 30px -14px rgba(0,0,0,.7);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button { font-family: inherit; }

.app { max-width: 1080px; margin: 0 auto; padding: 0 16px 96px; }

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 12px 4px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; letter-spacing: .2px; }
.brand .logo { font-size: 20px; }
.brand-text { font-size: 16px; }
@media (max-width: 460px) { .brand-text { display: none; } }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.dday {
  display: flex; align-items: baseline; gap: 3px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff; padding: 5px 12px; border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.dday-num { font-size: 18px; font-weight: 800; font-variant-numeric: tabular-nums; }
.dday-label { font-size: 12px; opacity: .9; }
.icon-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  width: 38px; height: 38px; border-radius: 50%; cursor: pointer; font-size: 16px;
  display: grid; place-items: center; transition: .15s;
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Tabs */
.tabs {
  display: flex; gap: 6px; overflow-x: auto; padding: 2px 0 12px;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; padding: 7px 13px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--text-soft);
  font-size: 13.5px; white-space: nowrap; transition: .15s; user-select: none;
}
.tab:hover { border-color: var(--line-strong); color: var(--text); }
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: var(--shadow-sm); }

/* Layout helpers */
.view { outline: none; }
.section { margin-bottom: 24px; }
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 820px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow-sm);
}
.card.pad-lg { padding: 22px; }
.card.flush { padding: 0; overflow: hidden; }

.hero {
  background: radial-gradient(1200px 300px at 10% -20%, color-mix(in srgb, var(--primary) 26%, transparent), transparent),
              linear-gradient(135deg, color-mix(in srgb, var(--primary) 12%, var(--card)), var(--card));
  border: 1px solid var(--line); border-radius: 18px; padding: 24px;
  box-shadow: var(--shadow);
}
.hero h1 { margin: 0 0 6px; font-size: 24px; letter-spacing: .3px; }
.hero p { margin: 0; color: var(--text-soft); }

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 10px; letter-spacing: .2px; }
h3 { font-size: 15.5px; margin: 0 0 8px; }
h4 { font-size: 14px; margin: 14px 0 6px; }
.sub { color: var(--text-soft); font-size: 13.5px; }
.mute { color: var(--text-mute); }
.small { font-size: 12.5px; }
.mono { font-family: var(--mono); }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; } .mt8 { margin-top: 8px; } .mt14 { margin-top: 14px; } .mb8 { margin-bottom: 8px; }

/* Badges */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--card-2); color: var(--text-soft); border: 1px solid var(--line);
}
.badge.primary { background: var(--primary-soft); color: var(--primary-ink); border-color: transparent; }
.badge.accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.badge.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  border: 1px solid var(--line-strong); background: var(--card); color: var(--text);
  padding: 8px 14px; border-radius: 10px; cursor: pointer; font-size: 13.5px; font-weight: 600;
  transition: .15s;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { filter: brightness(1.06); color: #fff; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
.btn.sm { padding: 5px 10px; font-size: 12.5px; border-radius: 8px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.link-btn { background: none; border: none; color: var(--text-mute); cursor: pointer; font-size: 12.5px; text-decoration: underline; padding: 0; }
.link-btn:hover { color: var(--primary); }

/* Progress */
.progress { height: 8px; background: var(--card-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--line); }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 999px; transition: width .35s; }
.progress.thin { height: 6px; }

/* Day plan */
.day {
  display: grid; grid-template-columns: 54px 1fr; gap: 14px; align-items: start;
}
.day-index {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  font-weight: 800; font-size: 19px; color: #fff; font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  box-shadow: var(--shadow-sm);
}
.day-body { min-width: 0; }
.day-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 2px; }
.day-head h3 { margin: 0; }

.tasklist { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 6px; }
.task {
  display: flex; gap: 10px; align-items: flex-start; padding: 9px 11px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--card-2);
  cursor: pointer; transition: .12s;
}
.task:hover { border-color: var(--line-strong); }
.task input { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--primary); flex: 0 0 auto; cursor: pointer; }
.task .t-body { flex: 1; min-width: 0; }
.task .t-title { font-size: 14px; }
.task .t-note { font-size: 12.5px; color: var(--text-mute); margin-top: 2px; }
.task.done { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 35%, var(--line)); }
.task.done .t-title { text-decoration: line-through; color: var(--text-mute); }
[data-theme="dark"] .task.done { background: color-mix(in srgb, var(--ok) 14%, var(--card)); }

.block-label { font-size: 12px; font-weight: 700; letter-spacing: .4px; color: var(--text-mute); text-transform: uppercase; margin: 14px 0 2px; }

/* Flip / knowledge cards */
.kcard { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.kcard > summary {
  list-style: none; cursor: pointer; padding: 14px 16px; display: flex; gap: 10px; align-items: center;
  font-weight: 700;
}
.kcard > summary::-webkit-details-marker { display: none; }
.kcard > summary::after { content: "＋"; margin-left: auto; color: var(--text-mute); font-weight: 700; }
.kcard[open] > summary::after { content: "－"; }
.kcard[open] > summary { border-bottom: 1px solid var(--line); }
.kcard .kc-body { padding: 6px 16px 16px; }
.pts { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 7px; }
.pts > li { position: relative; padding-left: 20px; font-size: 13.8px; color: var(--text-soft); }
.pts > li::before { content: ""; position: absolute; left: 6px; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.pts > li b, .pts > li strong { color: var(--text); }

.formula { font-family: var(--mono); font-size: 13px; background: var(--card-2); border: 1px dashed var(--line-strong); padding: 1px 6px; border-radius: 6px; }

/* Quiz */
.quiz-opt {
  display: flex; gap: 10px; align-items: flex-start; padding: 11px 13px; margin-top: 8px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--card-2); cursor: pointer; transition: .12s;
}
.quiz-opt:hover { border-color: var(--primary); }
.quiz-opt .key {
  flex: 0 0 auto; width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
  background: var(--card); border: 1px solid var(--line-strong); font-weight: 700; font-size: 13px;
}
.quiz-opt.correct { border-color: var(--ok); background: var(--ok-soft); }
.quiz-opt.correct .key { background: var(--ok); color: #fff; border-color: var(--ok); }
.quiz-opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.quiz-opt.wrong .key { background: var(--danger); color: #fff; border-color: var(--danger); }
.quiz-opt.disabled { cursor: default; }
.explain {
  margin-top: 12px; padding: 12px 14px; border-radius: 10px; font-size: 13.5px;
  background: var(--primary-soft); color: var(--text); border: 1px solid transparent;
}
.explain b { color: var(--primary-ink); }

/* Case / essay */
.tpl { border-left: 3px solid var(--primary); padding-left: 14px; }
.kv { display: grid; grid-template-columns: 92px 1fr; gap: 4px 12px; font-size: 13.8px; }
.kv dt { color: var(--text-mute); font-weight: 600; }
.kv dd { margin: 0; color: var(--text-soft); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.qa { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; background: var(--card); }
.qa .q { font-weight: 700; }
.qa .q .num { color: var(--primary); margin-right: 4px; }
.answer { margin-top: 8px; }
.answer[hidden] { display: none; }
pre.essay {
  white-space: pre-wrap; word-break: break-word; font-family: var(--sans);
  background: var(--card-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; font-size: 13.8px; line-height: 1.85; margin: 8px 0 0;
}
textarea {
  width: 100%; min-height: 160px; resize: vertical; font-family: var(--mono); font-size: 13.5px;
  background: var(--card-2); color: var(--text); border: 1px solid var(--line-strong);
  border-radius: 10px; padding: 12px; line-height: 1.7;
}
input[type="date"], input[type="text"], input[type="number"], select {
  font-family: inherit; font-size: 13.5px; padding: 7px 10px; border-radius: 9px;
  border: 1px solid var(--line-strong); background: var(--card); color: var(--text);
}

/* Timer */
.timer-display {
  font-family: var(--mono); font-size: 54px; font-weight: 800; text-align: center;
  font-variant-numeric: tabular-nums; letter-spacing: 1px; margin: 6px 0;
}
.timer-display.warn { color: var(--warn); }
.timer-display.danger { color: var(--danger); }
.preset-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }

/* Wrong book */
table.wrong { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.wrong th, table.wrong td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.wrong th { color: var(--text-mute); font-size: 12.5px; font-weight: 700; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; opacity: 0; pointer-events: none; transition: .25s; z-index: 60;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Footer */
.footer {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap;
  padding: 9px 14px; font-size: 12.5px; color: var(--text-mute);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
}
.footer-sep { opacity: .5; }

/* utility */
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.sticky-side { position: sticky; top: 78px; }
hr.sep { border: none; border-top: 1px solid var(--line); margin: 18px 0; }
.hoverline { padding: 10px 0; border-bottom: 1px dashed var(--line); }
.hoverline:last-child { border-bottom: none; }
.checkline { display: flex; gap: 9px; align-items: flex-start; padding: 6px 0; }
.checkline input { margin-top: 5px; accent-color: var(--accent); width: 15px; height: 15px; }
.callout { border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 10px; padding: 10px 14px; background: var(--accent-soft); font-size: 13.5px; color: var(--text-soft); }
.callout.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.callout.danger { border-left-color: var(--danger); background: var(--danger-soft); }

/* 记忆卡（翻牌） */
.flashcard {
  background: linear-gradient(160deg, color-mix(in srgb, var(--primary) 8%, var(--card)), var(--card));
  border: 1px solid var(--line); border-radius: 18px; padding: 34px 26px; min-height: 260px;
  display: flex; flex-direction: column; gap: 14px; cursor: pointer; box-shadow: var(--shadow);
  transition: border-color .15s, transform .15s;
}
.flashcard:hover { border-color: var(--primary); }
.flashcard .fc-front { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 8px; }
.flashcard .fc-q { font-size: 22px; font-weight: 800; line-height: 1.5; }
.flashcard .fc-hint { color: var(--text-mute); font-size: 13px; }
.flashcard .fc-back { text-align: left; }

/* 打卡热力图 */
.heatmap { display: flex; gap: 3px; margin-top: 12px; overflow-x: auto; padding-bottom: 4px; }
.heatmap .hm-col { display: flex; flex-direction: column; gap: 3px; }
.heatmap .hm-cell { width: 15px; height: 15px; border-radius: 4px; background: var(--card-2); }
.hm-legend { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-mute); margin-top: 8px; }
.hm-legend i { width: 15px; height: 15px; border-radius: 4px; display: inline-block; }

/* 打印 / 导出 PDF */
#printArea { display: none; }
@media print {
  .topbar, .tabs, .footer, .toast, .view { display: none !important; }
  #printArea { display: block !important; color: #000; background: #fff; }
  body { background: #fff; }
  #printArea h1 { font-size: 22px; margin: 0 0 4px; }
  #printArea h2 { font-size: 15px; margin: 16px 0 6px; border-bottom: 1px solid #999; padding-bottom: 2px; }
  #printArea h3 { font-size: 13.5px; margin: 10px 0 4px; }
  #printArea ul { margin: 4px 0; padding-left: 20px; font-size: 12.5px; line-height: 1.7; }
  #printArea table { width: 100%; border-collapse: collapse; font-size: 12px; margin-top: 6px; }
  #printArea th, #printArea td { border: 1px solid #999; padding: 4px 6px; text-align: left; }
  #printArea pre { white-space: pre-wrap; font-size: 12px; border: 1px solid #ccc; padding: 8px; }
  #printArea .muted { color: #555; font-size: 12px; }
  @page { margin: 14mm; }
}