/* 护眼模式（深夜读书）—— 只在 <html data-theme="night"> 时生效，白天的样式一行都没动。
 *
 * 开关在 js/theme.js（跟随装置的深色模式，也可以按「🌙 护眼」手动切换）。
 * 原则（docs/DESIGN.md 第六轮）：
 *   - 深暖灰纸面，不用纯黑；字是米白，不用纯白。蓝光少、对比够但不刺眼
 *   - 实心按钮用深玉绿底配米白字，不在黑暗里亮成一块
 *   - 题目配图保留「纸」的颜色（调暗），黑线图才看得见
 *   - 笔记画布是深色纸；笔迹存的是白天的颜色，画的时候由 js/notes.js 的 NIGHT_INK 换成亮版本
 *   - PDF 汇出（#pdfStage）永远是白纸黑字，这里不碰
 * 为什么每条都带 [data-theme="night"]：做题测验、引导、同步的样式是 JS 後插进来的，
 * 要比它们多一层才盖得过去。
 */

[data-theme="night"] {
  color-scheme: dark;

  --n-page: #1a1917;
  --n-surface: #24221e;
  --n-raised: #2c2924;
  --n-hover: #34312b;
  --n-sunken: #201e1b;
  --n-border: rgba(240, 228, 206, .11);
  --n-border-strong: rgba(240, 228, 206, .22);
  --n-text: #e8e1d4;
  --n-text-2: #c4bba9;
  --n-btn: #2b634b;          /* 实心按钮：深玉绿 × 米白字 6.1:1 */
  --n-btn-hover: #327356;
  --n-btn-text: #f3eee4;
  --n-paper: #e4ded1;        /* 题目配图：调暗的纸 */
  --logo-ink: #e6dfd1;       /* 网站图标（学士帽）：线条换米白，帽板、帽身压暗，不在黑暗里亮成一块 */
  --logo-paper: #34302a;
  --logo-phys: #4f7c7b;
  --logo-math: #8f8850;
  --logo-bio: #6cbd8d;
  --logo-bio2: #a3d9b5;
  --logo-chem: #a998e0;
  --logo-spark: #e2c85e;
  --n-note-paper: #2c2924;   /* 笔记画布：深色纸，五支笔的夜间墨色（js/notes.js NIGHT_INK）在上面都 ≥ 5.4:1 */
  --n-green: #9ad9b6;
  --n-green-bg: rgba(111, 196, 150, .14);
  --n-red: #f2aaa6;
  --n-red-bg: rgba(226, 104, 98, .15);
  --n-amber: #e9c682;
  --n-amber-bg: rgba(230, 176, 84, .14);

  --primary: #86cfa8;
  --primary-dark: #a5dcbf;
  --primary-light: rgba(134, 207, 168, .14);
  --bg-nature: linear-gradient(180deg, #1c1b18 0%, #181715 100%);
  --card-bg: rgba(36, 34, 30, .92);
  --card-border: var(--n-border);
  --text-main: var(--n-text);
  --text-muted: #c9c0af;
  --accent: #86c3e6;
  --success: #7fcf9f;
  --danger: #ee9a96;
  /* 功能色在暗底上要反过来：白天用深色，夜里用亮色（深青在深纸面上只有 2.7:1） */
  --fn-go: var(--primary);
  --fn-go-soft: rgba(134, 207, 168, .14);
  --fn-danger: #f2aaa6;
  --fn-danger-soft: rgba(242, 170, 166, .14);
  --fn-warn: #e9c682;
  --fn-warn-soft: rgba(233, 198, 130, .14);
  --fn-time: #86c3e6;
  --fn-time-soft: rgba(134, 195, 230, .14);
  --fn-quiet: var(--n-text-2);
  --hl-yellow: rgba(233, 198, 130, .24);
  --hl-green: rgba(134, 207, 168, .22);
  --hl-pink: rgba(240, 168, 200, .22);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 16px -8px rgba(0, 0, 0, .45);
  --shadow-md: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 24px -10px rgba(0, 0, 0, .55), 0 28px 56px -28px rgba(0, 0, 0, .6);
  --shadow-form: 0 10px 25px -5px rgba(0, 0, 0, .4), 0 8px 10px -6px rgba(0, 0, 0, .3);

  --retro-teal: #3f6a6f;
  --retro-teal-dark: #8fc3c9;
  --retro-cream: #2e2a24;
  --retro-coral: #e7866f;
  --retro-coral-deep: #e59a86;
  --retro-dark: var(--n-text);
  --retro-sand: #4a453d;

  scrollbar-color: #4a453d var(--n-page);
}

/* ---------- 浏览器自己的部分：选取、游标、捲轴、表单 ---------- */
[data-theme="night"] ::selection { background: rgba(134, 207, 168, .32); color: var(--n-text); }
[data-theme="night"] body { caret-color: var(--primary); accent-color: var(--primary); }
[data-theme="night"] .skip-link { background: var(--n-text); color: var(--n-page); }

/* ---------- 背景 ---------- */
[data-theme="night"] .floating-shapes .blob { opacity: .1; }
[data-theme="night"] .subject-bg-wash .blob { opacity: .08; }
[data-theme="night"] .grain-layer { display: none; }
/* 白天这层是提亮的白纱；夜里改成顶端微微压暗，让导航与面包屑站得住 */
[data-theme="night"] .custom-photo-layer::after {
  background: linear-gradient(180deg, rgba(26, 25, 23, .35), rgba(26, 25, 23, 0) 40%);
}
[data-theme="night"] .has-scene { --card-bg: rgba(36, 34, 30, .93); }
[data-theme="night"] .has-scene .sub-bookmark-bar { background: rgba(36, 34, 30, .9); }
[data-theme="night"] .has-scene .chapter-card:not(.active) { background: rgba(36, 34, 30, .9); }
[data-theme="night"] .has-scene .empty-state { background: rgba(36, 34, 30, .92); }
/* 直接压在水彩上的字（没有卡片垫著）：手机上角落的元素就在它们後面，用最亮的那档字 */
[data-theme="night"] .has-scene .breadcrumbs,
[data-theme="night"] .has-scene .node-label { color: var(--n-text); }

/* ---------- 顶栏、工具列 ---------- */
[data-theme="night"] .nav-inner {
  background: rgba(34, 32, 28, .78);
  border-color: var(--n-border);
  box-shadow: inset 0 1px 0 rgba(255, 244, 224, .06), 0 2px 6px rgba(0, 0, 0, .25), 0 18px 44px -20px rgba(0, 0, 0, .6);
}
[data-theme="night"] .nav-item { color: var(--n-text-2); }
[data-theme="night"] .nav-item:hover, [data-theme="night"] .nav-item.active { color: var(--primary); }
[data-theme="night"] .nav-logo {
  background: #302c26;
  border-color: rgba(233, 225, 212, .55);
  box-shadow: 0 0 0 5px rgba(34, 32, 28, .8), inset 0 1px 2px rgba(255, 244, 224, .08), 0 10px 24px -10px rgba(0, 0, 0, .6);
}
[data-theme="night"] .util-bar { border-bottom-color: var(--n-border); }
[data-theme="night"] .archive-toolbar label { color: var(--n-text) !important; }   /* 这个 label 的颜色写在 HTML 的 style 里 */
[data-theme="night"] .sound-toggle { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }

/* ---------- 首页 ---------- */
[data-theme="night"] .retro-hero-title {
  color: var(--retro-teal-dark);
  text-shadow: 3px 3px 0 rgba(0, 0, 0, .45), 5px 5px 0 rgba(143, 195, 201, .12);
}
[data-theme="night"] .retro-ribbon { box-shadow: 0 4px 0 rgba(0, 0, 0, .35); }
[data-theme="night"] .page-heading, [data-theme="night"] .subject-title { color: var(--n-text); }
[data-theme="night"] .subject-card:hover { background: var(--n-raised); }
[data-theme="night"] .resume-card { background: linear-gradient(135deg, #2b634b, #2a5a74); color: var(--n-btn-text); }
[data-theme="night"] .new-q-tip { background: var(--n-btn); color: var(--n-btn-text); box-shadow: 0 10px 28px -10px rgba(0,0,0,.7); }

[data-theme="night"] .orbit-track.outer { border-color: rgba(134, 207, 168, .2); }
[data-theme="night"] .orbit-track.inner { border-color: rgba(134, 195, 230, .12); }
/* 球心：和导航徽章同一块暗纸，线条米白；指到科目时外圈只淡淡染色，不在黑暗里亮成一圈 */
[data-theme="night"] .orbit-core {
  background: #302c26;
  border-color: var(--core-deep, rgba(233, 225, 212, .55));
  box-shadow: 0 0 0 8px color-mix(in oklab, var(--core-deep, #e9e1d4) 14%, transparent), 0 14px 32px -12px rgba(0, 0, 0, .7);
}
[data-theme="night"] .orbit-stage { --motif-ink: #e6dfd1; --motif-paper: #34302a; }
[data-theme="night"] .node-disc {
  background: color-mix(in oklab, var(--accent-color) 16%, var(--n-raised));
  border-color: rgba(233, 225, 212, .32); box-shadow: 0 8px 20px -10px rgba(0, 0, 0, .7);
}
[data-theme="night"] .node-glyph {
  --m-deep: color-mix(in oklab, var(--accent-color) 62%, #fff);
  --m-soft: color-mix(in oklab, var(--accent-color) 45%, var(--n-raised));
}
[data-theme="night"] .node-arc .arc-bg { stroke: rgba(240, 228, 206, .1); }
[data-theme="night"] .node-label { color: var(--n-text-2); text-shadow: 0 0 5px var(--n-page), 0 0 5px var(--n-page), 0 1px 2px rgba(0, 0, 0, .9); }
[data-theme="night"] .orbit-node.is-selected .node-label {
  color: var(--n-text); color: color-mix(in oklab, var(--accent-color) 45%, #fff);
  background: rgba(36, 34, 30, .94); text-shadow: none;
}
[data-theme="night"] .orbit-panel { background: rgba(36, 34, 30, .97); border-color: var(--n-border-strong); box-shadow: 0 20px 44px -18px rgba(0, 0, 0, .8); }
[data-theme="night"] .panel-bar { background: rgba(240, 228, 206, .1); }
[data-theme="night"] .panel-stat strong { color: color-mix(in oklab, var(--accent-color) 45%, #fff); }
[data-theme="night"] .panel-enter { color: var(--n-btn-text); background: color-mix(in oklab, var(--accent-color) 55%, #000); box-shadow: 0 8px 18px -10px rgba(0, 0, 0, .8); }
[data-theme="night"] .panel-enter[disabled] { background: var(--n-hover); color: var(--n-text-2); }
[data-theme="night"] .panel-enter.is-quiet { background: transparent; color: var(--n-text); box-shadow: inset 0 0 0 1px var(--n-border-strong); }

/* ---------- 统考倒数 ---------- */
[data-theme="night"] .exam-bubble { background: var(--n-raised); border-color: var(--n-border-strong); box-shadow: 0 4px 0 rgba(0, 0, 0, .28); }
[data-theme="night"] .exam-bubble::after { border-right-color: var(--n-raised); }
[data-theme="night"] .exam-bubble::before { border-right-color: var(--n-border-strong); }
[data-theme="night"] .exam-subject, [data-theme="night"] .exam-done { color: var(--n-text); }
[data-theme="night"] .exam-when b { color: var(--primary); }
[data-theme="night"] .exam-when em { color: var(--n-text-2); }
[data-theme="night"] .exam-list { background: var(--n-raised); border-color: var(--n-border-strong); }
[data-theme="night"] .exam-caret { border-color: var(--n-text-2); }
[data-theme="night"] .exam-list-title, [data-theme="night"] .exam-day-date em, [data-theme="night"] .exam-slot-half { color: var(--n-text-2); }
[data-theme="night"] .exam-day-date b, [data-theme="night"] .exam-slot { color: var(--n-text); }
[data-theme="night"] .exam-day { border-top-color: var(--n-border-strong); }
[data-theme="night"] .exam-slot.is-past { color: var(--n-text-2); }
[data-theme="night"] .exam-slot-time { color: var(--n-text); }
[data-theme="night"] .exam-slot-note, [data-theme="night"] .exam-list-hint { color: var(--n-text-2); }
[data-theme="night"] .exam-part-len, [data-theme="night"] .exam-parts-subj { color: var(--n-text-2); }
[data-theme="night"] .exam-parts li.is-now { background: rgba(156, 74, 58, .35); }
[data-theme="night"] .exam-slot.is-next .exam-slot-tag { background: #9c4a3a; color: var(--n-btn-text); }
[data-theme="night"] .exam-slot.is-past .exam-slot-subj { text-decoration-color: rgba(255, 255, 255, .3); }
/* 日历在暗底上：纸面压暗、墨线换成米白，红色抬头收一档 */
[data-theme="night"] .exam-cal .cal-paper { fill: #e0d8c6; }
[data-theme="night"] .exam-cal .cal-head { fill: #b34a37; }
[data-theme="night"] .exam-cal .cal-ring { fill: #cfc6b2; }
/* 统考闹钟：钟面和日历一样压暗；面板、输入框、音效按钮换成暗纸 */
[data-theme="night"] .alarm-clock .clk-body { fill: #e0d8c6; }
[data-theme="night"] .alarm-clock .clk-bell { fill: #b34a37; }
/* 日历、闹钟的眼睛和嘴巴画在米色纸面／钟面上，照白天用深色（外框的墨线才换米白） */
[data-theme="night"] .exam-cal .cal-face, [data-theme="night"] .alarm-clock .clk-face { fill: #3f3e3c; }
[data-theme="night"] .exam-cal .cal-smile, [data-theme="night"] .alarm-clock .clk-smile { stroke: #3f3e3c; }
[data-theme="night"] .alarm-count { background: #9c4a3a; border-color: var(--n-page); color: var(--n-btn-text); }
[data-theme="night"] .alarm-panel, [data-theme="night"] .alarm-ring { background: var(--n-raised); border-color: var(--n-border-strong); }
[data-theme="night"] .alarm-title, [data-theme="night"] .alarm-field, [data-theme="night"] .alarm-sounds-label { color: var(--n-text-2); }
[data-theme="night"] .alarm-hint, [data-theme="night"] .alarm-item-exam, [data-theme="night"] .alarm-empty,
[data-theme="night"] .alarm-sounds-label em, [data-theme="night"] .alarm-ring-text span { color: var(--n-text-2); }
[data-theme="night"] .alarm-list li, [data-theme="night"] .alarm-repeat, [data-theme="night"] .alarm-status,
[data-theme="night"] .alarm-ring-text strong { color: var(--n-text); }
[data-theme="night"] .alarm-list li, [data-theme="night"] .alarm-form, [data-theme="night"] .alarm-sounds-head { border-color: var(--n-border-strong); }
[data-theme="night"] .alarm-status { background: var(--n-red-bg); }
[data-theme="night"] .alarm-status.is-ok { background: var(--n-green-bg); }
[data-theme="night"] .alarm-field select, [data-theme="night"] .alarm-field input, [data-theme="night"] #alarmDate,
[data-theme="night"] .alarm-sound span { background: var(--n-sunken); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .alarm-sound input:checked + span { background: var(--n-btn); border-color: var(--n-btn); color: var(--n-btn-text); }
[data-theme="night"] .alarm-repeat input[type="radio"] { accent-color: var(--n-green); }
[data-theme="night"] .alarm-del, [data-theme="night"] .alarm-ring-close { color: var(--n-text-2); }
[data-theme="night"] .alarm-del:hover { color: var(--n-red); background: var(--n-red-bg); }
[data-theme="night"] .alarm-ring-close:hover { color: var(--n-text); background: var(--n-hover); }
[data-theme="night"] .alarm-error { color: var(--n-red); }

/* ---------- 章节卡、分页 ---------- */
[data-theme="night"] #syncBtn { border-color: rgba(134, 195, 230, .4); }
[data-theme="night"] .btn-danger { background: transparent; border-color: rgba(242, 170, 166, .4); }
[data-theme="night"] .chapter-card { background: rgba(36, 34, 30, .72); border-color: var(--n-border); }
[data-theme="night"] .chapter-card:hover { background: rgba(44, 41, 36, .92); border-color: rgba(134, 207, 168, .45); }
[data-theme="night"] .rail-track { background: rgba(240, 228, 206, .14); }
[data-theme="night"] .rail-thumb { background: #86cfa8; }
[data-theme="night"] .chapter-card.active { background: var(--n-raised); border-color: var(--primary); }
[data-theme="night"] .chapter-card::before { background: radial-gradient(160px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 244, 224, .07), rgba(255, 244, 224, 0) 62%); }
[data-theme="night"] .chap-name { color: var(--n-text); }
[data-theme="night"] .chap-bar { background: rgba(240, 228, 206, .12); }
[data-theme="night"] #wrongCountBadge { background: #b54640; color: #fff; }
[data-theme="night"] .sub-bookmark-bar { background: rgba(36, 34, 30, .7); border-color: var(--n-border); box-shadow: inset 0 1px 0 rgba(255, 244, 224, .04), 0 1px 2px rgba(0, 0, 0, .2); }
[data-theme="night"] .sub-tab-btn.active { background: var(--n-hover); }

/* ---------- 选择题 ---------- */
[data-theme="night"] .flashcard { box-shadow: inset 0 1px 0 rgba(255, 244, 224, .05), var(--shadow-md); }
[data-theme="night"] .mcq-question, [data-theme="night"] .form-question-text { color: var(--n-text); }
[data-theme="night"] .option-btn {
  background: var(--n-raised); border-color: var(--n-border); color: var(--n-text);
  box-shadow: inset 0 1px 0 rgba(255, 244, 224, .04), 0 1px 2px rgba(0, 0, 0, .2);
}
[data-theme="night"] .option-btn:hover:not(.locked) { background: var(--n-hover); border-color: rgba(134, 207, 168, .45); box-shadow: 0 6px 18px -8px rgba(0, 0, 0, .6); }
[data-theme="night"] .opt-badge { background: var(--n-sunken); border-color: var(--n-border-strong); color: var(--n-text-2); box-shadow: none; }
[data-theme="night"] .option-btn:hover:not(.locked) .opt-badge { background: var(--n-btn); border-color: var(--n-btn); color: var(--n-btn-text); }
[data-theme="night"] .option-btn.correct { background: var(--n-green-bg) !important; border-color: var(--success) !important; color: var(--n-green) !important; }
[data-theme="night"] .option-btn.correct .opt-badge { background: var(--n-btn); border-color: var(--n-btn); color: var(--n-btn-text); }
[data-theme="night"] .option-btn.wrong { background: var(--n-red-bg); border-color: var(--danger); color: var(--n-red); }
[data-theme="night"] .option-btn.wrong .opt-badge { background: #9b3434; border-color: #9b3434; color: var(--n-btn-text); }
[data-theme="night"] .opt-tag { color: var(--n-green); border-color: rgba(154, 217, 182, .45); }
[data-theme="night"] .mcq-verdict.is-right { background: var(--n-green-bg); color: var(--n-green); border-left-color: var(--primary); }
[data-theme="night"] .mcq-verdict.is-wrong { background: var(--n-amber-bg); color: var(--n-amber); border-left-color: #c58b3a; }
[data-theme="night"] .verdict-next { background: var(--n-raised); color: var(--primary); border-color: rgba(134, 207, 168, .4); }
[data-theme="night"] .explanation { background: var(--n-green-bg); color: var(--n-green); }
[data-theme="night"] .figure-container { background: var(--n-paper); border-color: var(--n-border); }
[data-theme="night"] .figure-caption { color: #2a5a74; }
[data-theme="night"] .card-footer { border-top-color: var(--n-border); }
[data-theme="night"] .btn-nav { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .kbd-hint kbd { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .card-note-btn { box-shadow: 0 3px 8px rgba(0, 0, 0, .35); }
[data-theme="night"] .card-note-btn:hover { background: var(--retro-teal); color: var(--n-text); }
[data-theme="night"] .note-inline-toggle { box-shadow: 0 3px 8px rgba(0, 0, 0, .35); }
[data-theme="night"] .note-inline { background: #2e2a1c; border-color: #6b5a2a; }
[data-theme="night"] .note-inline-head { color: #e8c97a; }
[data-theme="night"] .note-inline-text { color: var(--n-text); }
[data-theme="night"] .note-inline-ink { background: var(--n-note-paper); border-color: var(--n-border-strong); }
[data-theme="night"] .card-note-btn.has-note { background: #9c4a3a; border-color: #9c4a3a; color: var(--n-btn-text); }

/* 实心的主要按钮：深玉绿 × 米白字 */
[data-theme="night"] .empty-btn.primary, [data-theme="night"] .chapter-test-btn, [data-theme="night"] .wrong-item-jump,
[data-theme="night"] .test-submit, [data-theme="night"] .test-btn.primary, [data-theme="night"] .ob-btn:not(.ghost),
[data-theme="night"] .sync-btn:not(.ghost), [data-theme="night"] .test-q.is-answered .test-q-no {
  background: var(--n-btn); border-color: var(--n-btn); color: var(--n-btn-text); box-shadow: 0 8px 18px -10px rgba(0, 0, 0, .7);
}
[data-theme="night"] .empty-btn.primary:hover, [data-theme="night"] .chapter-test-btn:hover, [data-theme="night"] .wrong-item-jump:hover,
[data-theme="night"] .test-submit:hover, [data-theme="night"] .test-btn.primary:hover { background: var(--n-btn-hover); }

/* ---------- 做答题（闪卡）、划重点 ---------- */
[data-theme="night"] .form-question-card { background: var(--n-surface); border-color: var(--n-border); }
[data-theme="night"] .form-card-top-bar { background: linear-gradient(90deg, #2b634b, #2a5a74); }
[data-theme="night"] .answer-flip-panel { background: var(--n-sunken); border-color: var(--n-border); }
[data-theme="night"] .flip-toggle-header { background: var(--n-raised); }
[data-theme="night"] .flip-toggle-header:hover { background: var(--n-hover); }
[data-theme="night"] .flip-toggle-title { color: var(--n-text-2); }
[data-theme="night"] .flip-status-pill { background: var(--n-sunken); }
[data-theme="night"] .flip-answer-content { background: var(--n-surface); color: var(--n-text); }
/* 题目来源的小标签与首页底部的制作名单：夜里改用亮一点的字、淡淡的底 */
[data-theme="night"] .q-tag-exam { background: rgba(134, 207, 168, .14); color: var(--n-green); }
[data-theme="night"] .q-tag-extra { background: var(--n-amber-bg); color: var(--n-amber); }
[data-theme="night"] .q-tag-school { background: rgba(169, 152, 224, .15); color: #c9bdf0; }
[data-theme="night"] .site-credits { color: var(--n-text-2); border-top-color: var(--n-border-strong); }
[data-theme="night"] .form-q-num { background: rgba(255, 255, 255, .08); color: var(--n-text-2); }
[data-theme="night"] .subj-attempt { background: var(--n-sunken); border-color: var(--n-border-strong); }
[data-theme="night"] .subj-attempt-label { color: var(--n-text-2); }
[data-theme="night"] .subj-attempt-input { color: var(--n-text); background-image: repeating-linear-gradient(transparent 0 27px, rgba(255, 255, 255, .07) 27px 28px); }
[data-theme="night"] .subj-grade-result { background: var(--n-surface); border-color: var(--n-border); color: var(--n-text); }
[data-theme="night"] .subj-grade-result.is-error { background: #3a2418; border-color: #6b3a22; color: #fdba74; }
[data-theme="night"] .grade-meter { background: var(--n-raised); }
[data-theme="night"] .grade-point, [data-theme="night"] .grade-feedback { color: var(--n-text); }
[data-theme="night"] .grade-comment { color: var(--n-text-2); }
[data-theme="night"] .ai-explain-btn { background: var(--n-raised); border-color: rgba(125, 211, 232, .35); color: #8fd3e3; }
[data-theme="night"] .ai-explain-btn:hover { background: var(--n-hover); }
[data-theme="night"] .mock-exam-btn { background: var(--n-raised); border-color: rgba(134, 195, 230, .4); color: var(--fn-time); }
[data-theme="night"] .mock-exam-btn:hover { background: var(--n-hover); }
[data-theme="night"] .test-clock { color: var(--fn-time); }
[data-theme="night"] .test-clock.is-low { color: var(--n-red); }
[data-theme="night"] .test-unanswered { color: var(--n-amber); }
[data-theme="night"] .ai-explain-out { background: var(--n-surface); border-color: var(--n-border); color: var(--n-text); }
[data-theme="night"] .ai-explain-concept b, [data-theme="night"] .ai-explain-tip b { color: #8fd3e3; }
[data-theme="night"] .ai-explain-note { color: var(--n-text-2); }
[data-theme="night"] .ai-explain-out.is-error { background: #3a2418; border-color: #6b3a22; color: #fdba74; }
[data-theme="night"] .grade-feedback { border-top-color: var(--n-border); }
[data-theme="night"] .hl-btn-action { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .hl-color-btn.selected { border-color: var(--n-text); }
[data-theme="night"] .hl-mark-yellow { color: var(--n-amber); }
[data-theme="night"] .hl-mark-green { color: var(--n-green); }
[data-theme="night"] .hl-mark-pink { color: #f0a8c8; }

/* ---------- 空状态、今日复习、错题本、整章测验入口 ---------- */
[data-theme="night"] .empty-state { background: rgba(36, 34, 30, .88); border-color: var(--n-border); box-shadow: inset 0 1px 0 rgba(255, 244, 224, .04), var(--shadow-sm); }
[data-theme="night"] .empty-glyph { background: var(--n-green-bg); border-color: rgba(134, 207, 168, .2); }
[data-theme="night"] .empty-title, [data-theme="night"] .review-count, [data-theme="night"] .cc-name,
[data-theme="night"] .wrong-group-title { color: var(--n-text); }
[data-theme="night"] .empty-btn { background: var(--n-raised); color: var(--primary); border-color: rgba(134, 207, 168, .35); }
[data-theme="night"] .review-bar { background: rgba(134, 207, 168, .14); }
[data-theme="night"] .review-item { background: var(--n-raised); border-color: var(--n-border); }
[data-theme="night"] .review-item:hover { background: var(--n-hover); border-color: rgba(134, 207, 168, .45); }
[data-theme="night"] .review-dot { border-color: rgba(134, 207, 168, .55); }
[data-theme="night"] .review-q, [data-theme="night"] .wrong-row-q, [data-theme="night"] .wrong-item-q { color: var(--n-text); }
[data-theme="night"] .review-meta em, [data-theme="night"] .wrong-book-head strong, [data-theme="night"] .wrong-group-n,
[data-theme="night"] .wrong-group.is-stubborn .wrong-group-title, [data-theme="night"] .wrong-row-go { color: var(--n-red); }
[data-theme="night"] .wrong-item-chapter { background: var(--n-red-bg); color: var(--n-red); }
[data-theme="night"] .wrong-row { border-top-color: var(--n-border); }
[data-theme="night"] .wrong-row:hover { background: rgba(226, 104, 98, .08); }
[data-theme="night"] .wrong-row-meta em { color: var(--n-green); }
[data-theme="night"] .wrong-group.is-stubborn { border-color: rgba(242, 170, 166, .35); box-shadow: 0 0 0 3px rgba(226, 104, 98, .08), var(--shadow-sm); }
[data-theme="night"] .chapter-current { background: rgba(36, 34, 30, .9); border-color: var(--n-border); color: var(--n-text); box-shadow: 0 1px 2px rgba(0, 0, 0, .25); }
[data-theme="night"] .chapter-current:hover, [data-theme="night"] .chapter-current[aria-expanded="true"] { background: var(--n-raised); border-color: rgba(134, 207, 168, .45); }
[data-theme="night"] .cc-index, [data-theme="night"] .cc-meta, [data-theme="night"] .cc-caret { color: var(--n-text-2); }
[data-theme="night"] .cc-meta.is-done { color: var(--n-green); }
[data-theme="night"] .achieve-toast { background: linear-gradient(135deg, #2b634b, #2a5a74); color: var(--n-btn-text); box-shadow: 0 14px 30px -8px rgba(0, 0, 0, .6); }

/* ---------- 整章测验（样式在 js/chapter-test.js） ---------- */
[data-theme="night"] .test-bar, [data-theme="night"] .test-result { background: rgba(36, 34, 30, .95); border-color: var(--n-border); box-shadow: 0 2px 6px rgba(0, 0, 0, .25), 0 16px 36px -20px rgba(0, 0, 0, .7); }
[data-theme="night"] .test-title, [data-theme="night"] .test-q-head, [data-theme="night"] .test-confirm-title { color: var(--n-text); }
[data-theme="night"] .test-exit { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .test-meter { background: rgba(240, 228, 206, .1); }
[data-theme="night"] .test-q { background: rgba(36, 34, 30, .93); border-color: var(--n-border); box-shadow: 0 1px 2px rgba(0, 0, 0, .25), 0 10px 24px -14px rgba(0, 0, 0, .6); }
[data-theme="night"] .test-q.is-missing { border-color: #c58b3a; box-shadow: 0 0 0 3px rgba(197, 139, 58, .2); }
[data-theme="night"] .test-q-no { color: var(--n-green); background: var(--n-green-bg); }
[data-theme="night"] .test-opt { background: var(--n-raised); border-color: var(--n-border); color: var(--n-text); }
[data-theme="night"] .test-opt:hover { border-color: rgba(134, 207, 168, .45); }
[data-theme="night"] .test-opt.is-checked, [data-theme="night"] .test-opt.is-right { background: var(--n-green-bg); border-color: var(--primary); color: var(--n-green); }
[data-theme="night"] .test-opt.is-checked .opt-badge, [data-theme="night"] .test-opt.is-right .opt-badge { background: var(--n-btn); border-color: var(--n-btn); color: var(--n-btn-text); }
[data-theme="night"] .test-opt.is-wrong { background: var(--n-red-bg); border-color: var(--danger); color: var(--n-red); }
[data-theme="night"] .test-opt.is-wrong .opt-badge { background: #9b3434; border-color: #9b3434; color: var(--n-btn-text); }
[data-theme="night"] .test-opt.is-plain:hover { border-color: var(--n-border); }
[data-theme="night"] .test-submit[aria-disabled="true"] { background: var(--n-hover); border-color: var(--n-hover); color: var(--n-text-2); box-shadow: none; }
[data-theme="night"] .test-submit-note.is-warn { color: var(--n-amber); }
[data-theme="night"] .test-score, [data-theme="night"] .test-score-msg, [data-theme="night"] .test-confirm-body { color: var(--n-text); }
[data-theme="night"] .test-btn { background: var(--n-raised); color: var(--primary); border-color: rgba(134, 207, 168, .35); }
[data-theme="night"] .test-btn.danger { background: #9b3434; border-color: #9b3434; color: var(--n-btn-text); }
[data-theme="night"] .test-q.is-result-wrong { border-color: rgba(242, 170, 166, .35); }
[data-theme="night"] .test-exp { background: var(--n-green-bg); color: var(--n-green); border-left-color: var(--primary); }
[data-theme="night"] .test-confirm-box { background: var(--n-surface); box-shadow: 0 24px 60px -20px rgba(0, 0, 0, .8); }

/* ---------- 对话框：首次引导、同步、笔记 ---------- */
[data-theme="night"] .ob-mask, [data-theme="night"] .sync-mask, [data-theme="night"] .note-modal { background: rgba(8, 8, 7, .62); }
[data-theme="night"] .ob-box, [data-theme="night"] .sync-box { background: rgba(36, 34, 30, .98); border-color: var(--n-border); box-shadow: inset 0 1px 0 rgba(255, 244, 224, .05), 0 28px 70px -28px rgba(0, 0, 0, .85); }
[data-theme="night"] .ob-title, [data-theme="night"] .sync-title { color: var(--n-text); }
/* 更新日志（js/devlog.js）：和同步面板同一种暗纸 */
[data-theme="night"] .devlog-mask { background: rgba(8, 8, 7, .62); }
[data-theme="night"] .devlog-box { background: rgba(36, 34, 30, .98); border-color: var(--n-border); box-shadow: inset 0 1px 0 rgba(255, 244, 224, .05), 0 28px 70px -28px rgba(0, 0, 0, .85); }
[data-theme="night"] .devlog-title, [data-theme="night"] .devlog-items { color: var(--n-text); }
[data-theme="night"] .devlog-ver, [data-theme="night"] .devlog-sub, [data-theme="night"] .devlog-empty, [data-theme="night"] .devlog-close { color: var(--n-text-2); }
[data-theme="night"] .devlog-ver b { color: var(--primary); }
[data-theme="night"] .devlog-entry { border-top-color: var(--n-border-strong); }
[data-theme="night"] .devlog-close:hover { background: var(--n-hover); color: var(--n-text); }
[data-theme="night"] .devlog-new { background: #9c4a3a; color: var(--n-btn-text); }
[data-theme="night"] .devlog-dot { background: #e2685f; border-color: var(--n-page); }
[data-theme="night"] .ob-body { color: var(--n-text-2); }
[data-theme="night"] .ob-dot { background: var(--n-border-strong); }
[data-theme="night"] .ob-btn.ghost { color: var(--n-text-2); }
[data-theme="night"] .ob-btn.ghost:hover { color: var(--n-text); }
[data-theme="night"] .sync-code { background: var(--n-sunken); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .sync-btn.ghost { background: var(--n-raised); color: var(--n-text); border-color: var(--n-border-strong); }
[data-theme="night"] .sync-btn[disabled] { background: var(--n-hover); color: var(--n-text-2); }
[data-theme="night"] .sync-input, [data-theme="night"] .fb-input, [data-theme="night"] .fb-textarea, [data-theme="night"] .fb-select {
  background: var(--n-sunken); border-color: var(--n-border-strong); color: var(--n-text);
}

[data-theme="night"] .note-dialog { background: var(--n-surface); box-shadow: 0 24px 60px -12px rgba(0, 0, 0, .8); }
[data-theme="night"] .note-dialog-head { color: var(--n-text); }
[data-theme="night"] .note-close-btn { color: var(--n-text); }
[data-theme="night"] .note-toolbar, [data-theme="night"] .note-dialog-foot { background: var(--n-sunken); border-color: var(--n-border); }
[data-theme="night"] .note-tool-btn { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .note-tool-btn.active { background: var(--retro-teal); border-color: var(--retro-teal); color: var(--n-text); }
/* 夜间墨色都是亮的（黑笔变米白），框线跟色点同色会糊在一起：改成深色间隔 + 外圈亮环 */
[data-theme="night"] .note-color-dot.selected { border-color: var(--n-sunken); box-shadow: 0 0 0 2px var(--n-text); }
/* 画布保留纸色：笔记里有深色笔迹，画在黑底上会看不见 */
[data-theme="night"] .note-stage-scroll { background: var(--n-sunken); }
[data-theme="night"] .note-stage { background: var(--n-note-paper); border-color: var(--n-border-strong); }
[data-theme="night"] .note-snapshot-q { color: var(--n-text); }
[data-theme="night"] .note-snapshot-opt { color: var(--n-text-2); border-color: var(--n-border-strong); }
[data-theme="night"] .note-snapshot-hint { color: var(--n-text-2); }
[data-theme="night"] .note-snapshot-tag { background: var(--n-green-bg); color: var(--n-green); }
[data-theme="night"] .note-text-area { border-top-color: var(--n-border); }
[data-theme="night"] .note-text-area textarea { background: var(--n-sunken); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .btn-primary-retro, [data-theme="night"] .subj-grade-btn { background: var(--n-btn); color: var(--n-btn-text); box-shadow: 0 4px 12px -2px rgba(0, 0, 0, .5); }
[data-theme="night"] .btn-primary-retro:hover, [data-theme="night"] .subj-grade-btn:hover { background: var(--n-btn-hover); }
[data-theme="night"] .btn-ghost-retro { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }

/* ---------- 笔记、题目档、申诉页 ---------- */
[data-theme="night"] .note-card-preview { background: var(--n-note-paper); border-bottom-color: var(--n-border); }
[data-theme="night"] .note-card-q { color: var(--n-text); }
[data-theme="night"] .note-card-actions { background: var(--n-sunken); border-top-color: var(--n-border); }
[data-theme="night"] .note-mini-btn { background: var(--n-raised); border-color: var(--n-border-strong); color: var(--n-text); }
[data-theme="night"] .archive-subject-tabs { background: var(--n-sunken); border-color: var(--n-border); }
[data-theme="night"] .archive-tab.active { background: var(--n-hover); }
[data-theme="night"] .archive-chapter-head { background: var(--n-raised); }
[data-theme="night"] .archive-chapter-title, [data-theme="night"] .archive-q-text { color: var(--n-text); }
[data-theme="night"] .archive-q-row { border-bottom-color: var(--n-border); }
[data-theme="night"] .archive-q-row:hover { background: var(--n-hover); }
[data-theme="night"] .archive-q-badge.mcq { background: rgba(134, 195, 230, .16); color: #9fcfec; }
[data-theme="night"] .archive-q-badge.subj { background: var(--n-amber-bg); color: var(--n-amber); }
[data-theme="night"] .pdf-progress-box { background: var(--n-surface); }
[data-theme="night"] .pdf-progress-text { color: var(--n-text); }
[data-theme="night"] .fb-label, [data-theme="night"] .fb-report-text { color: var(--n-text); }
[data-theme="night"] .fb-status.pending { background: var(--n-amber-bg); color: var(--n-amber); }
[data-theme="night"] .fb-status.resolved { background: var(--n-green-bg); color: var(--n-green); }
[data-theme="night"] .fb-report-reply { background: var(--n-green-bg); color: var(--n-green); }

/* 通知小精灵 */
[data-theme="night"] .sprite-panel { box-shadow: 0 12px 28px -8px rgba(0, 0, 0, .7); }
[data-theme="night"] .sprite-char { filter: drop-shadow(0 6px 10px rgba(0, 0, 0, .6)); }
[data-theme="night"] .sprite-btn { background: var(--n-raised); }
[data-theme="night"] .sprite-btn:hover { background: var(--retro-teal); color: var(--n-text); }
[data-theme="night"] .sprite-btn.ok:hover { background: var(--n-btn); color: var(--n-btn-text); }
[data-theme="night"] .sprite-toggle { background: var(--n-hover); }
[data-theme="night"] .sprite-toggle::after { background: var(--n-text); }
[data-theme="night"] .sprite-bubble { background: #9c4a3a; color: var(--n-btn-text); }
[data-theme="night"] .sprite-badge { border-color: var(--n-surface); }
[data-theme="night"] .sprite-new-issue-box { background: var(--n-surface); }

/* ---------- PDF 汇出：永远白纸黑字 ---------- */
[data-theme="night"] #pdfStage {
  color-scheme: light;
  --text-main: #0f172a; --text-muted: #475569; --primary: #047857; --primary-dark: #065f46; --primary-light: #ecfdf5;
}

/* 不认 color-mix 的旧浏览器（iOS 16.2、Chrome 111 以前，包括较旧的华为、三星内建浏览器）：
   值里有 var() 的宣告不会退回上一条，而是整个变成「没设」（字色跟着外层、按钮没有底色），
   所以不能只在前面多写一条，要在这些规则之後另外补。这一段必须留在档案最後 */
@supports not (color: color-mix(in oklab, red 50%, blue)) {
  [data-theme="night"] .orbit-core { box-shadow: 0 14px 32px -12px rgba(0, 0, 0, .7); }
  [data-theme="night"] .node-disc { background: var(--n-raised); }
  [data-theme="night"] .node-glyph { --m-deep: var(--accent-color); --m-soft: var(--n-hover); }
  [data-theme="night"] .orbit-node.is-selected .node-label,
  [data-theme="night"] .panel-stat strong { color: var(--n-text); }
  [data-theme="night"] .panel-enter { background: var(--n-btn); }
}