/* ===== 主题变量（黑为默认，白为浅色） ===== */
:root, html[data-theme="dark"] {
  --bg: #0b0d11; --text: #e8edf5; --text-sub: #6b7280; --text-soft: #9ca3af;
  --card-bg: linear-gradient(145deg, #161a22, #1e232e);
  --card-border: #262b36; --card-border-hover: #3a4052;
  --panel: #161a22; --panel-border: #2a2f3a; --panel-text: #f3f4f6;
  --toast-bg: #1e232e; --toast-border: #2a2f3a; --toast-text: #d1d5db;
  --pill-bg: rgba(22,26,34,0.85);
  --glass-border: rgba(255,255,255,0.08);
  --overlay-backdrop: rgba(11,13,17,0.72);
  --input-bg: #10131a;
  --shadow-card: 0 12px 32px rgba(0,0,0,0.45);
  --acc-a: #f0c27f; --acc-b: #fc5c7d;
  --acc-soft: rgba(240,194,127,0.32); --acc-strong: rgba(240,194,127,0.60);
  --acc-glow: rgba(240,194,127,0.14); --acc-tint: rgba(240,194,127,0.08);
  --up: #4ade80; --down: #f87171;
}
html[data-theme="light"] {
  --bg: #f5f3ee; --text: #2b2f3a; --text-sub: #7b8294; --text-soft: #8b90a0;
  --card-bg: linear-gradient(145deg, #ffffff, #f4f1ea);
  --card-border: #e6e1d6; --card-border-hover: #d4cdbd;
  --panel: #ffffff; --panel-border: #e6e1d6; --panel-text: #2b2f3a;
  --toast-bg: #ffffff; --toast-border: #e6e1d6; --toast-text: #4b5563;
  --pill-bg: rgba(255,255,255,0.88);
  --glass-border: rgba(0,0,0,0.08);
  --overlay-backdrop: rgba(245,243,238,0.78);
  --input-bg: #f7f5f0;
  --shadow-card: 0 12px 32px rgba(90,80,60,0.15);
  --acc-soft: rgba(240,194,127,0.45); --acc-strong: rgba(214,158,84,0.75);
  --acc-glow: rgba(240,194,127,0.2); --acc-tint: rgba(240,194,127,0.12);
  --up: #16a34a; --down: #dc2626;
}

/* 科目色 */
:root { --c-math: #f0c27f; --c-chinese: #fc5c7d; --c-english: #7cc4ff; --c-other: #c9a4ff; }

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%; min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
}

.container { position: relative; z-index: 1; max-width: 520px; margin: 0 auto; padding: 28px 18px 44px; }

/* ===== Header ===== */
.header { text-align: center; padding: 20px 0 10px; }
.header .logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 25px; font-weight: 700; letter-spacing: 1px;
  background: linear-gradient(135deg, var(--acc-a), var(--acc-b));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.header .logo svg { width: 30px; height: 30px; }
.header .subtitle { margin-top: 8px; font-size: 13px; color: var(--text-sub); }

/* ===== 微信提示 ===== */
.wechat-banner {
  margin: 14px 0 4px; padding: 12px 14px; border-radius: 12px;
  background: linear-gradient(135deg, var(--acc-tint), var(--acc-glow));
  border: 1px solid var(--acc-soft);
}
.wechat-banner .banner-desc { font-size: 13px; line-height: 1.6; color: var(--text-soft); text-align: center; }
.wechat-banner strong { color: var(--acc-a); }

/* ===== 统计条 ===== */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
  margin: 16px 0;
}
.stat {
  padding: 12px 4px; border-radius: 14px; text-align: center;
  background: var(--card-bg); border: 1px solid var(--card-border);
}
.stat-num {
  font-size: 20px; font-weight: 700;
  background: linear-gradient(135deg, var(--acc-a), var(--acc-b));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-num.small { font-size: 13px; line-height: 26px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat-label { margin-top: 3px; font-size: 11px; color: var(--text-sub); }

/* ===== 面板（曲线） ===== */
.panel {
  padding: 16px 14px 10px; border-radius: 18px; margin-bottom: 16px;
  background: var(--card-bg); border: 1px solid var(--card-border);
}
.panel-title { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.legend { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 6px; min-height: 16px; }
.legend .lg-item { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; color: var(--text-soft); }
.legend .lg-dot { width: 8px; height: 8px; border-radius: 50%; }
#chartBox svg { width: 100%; height: auto; display: block; }
.chart-empty { text-align: center; color: var(--text-sub); font-size: 12px; padding: 26px 0; }

/* ===== 筛选 ===== */
.filters { margin-bottom: 14px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 7px 14px; border-radius: 999px; font-size: 13px; cursor: pointer;
  background: var(--panel); border: 1px solid var(--panel-border); color: var(--text-soft);
  transition: all 0.2s;
}
.chip.on {
  color: var(--text); border-color: var(--acc-soft);
  background: linear-gradient(135deg, var(--acc-tint), var(--acc-glow));
}
.filter-selects { display: flex; gap: 8px; margin-top: 10px; }
.filter-selects select {
  flex: 1; padding: 8px 10px; border-radius: 10px; font-size: 13px;
  background: var(--panel); border: 1px solid var(--panel-border); color: var(--text);
}

/* ===== 时间轴卡片 ===== */
.cards { display: flex; flex-direction: column; gap: 12px; position: relative; }
.exam-card {
  position: relative; display: block; width: 100%; text-align: left;
  padding: 15px 16px 13px 20px; border-radius: 16px; cursor: pointer;
  background: var(--card-bg); border: 1px solid var(--card-border);
  transition: transform 0.18s, border-color 0.22s;
  overflow: hidden;
}
.exam-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--subject-color, var(--acc-a)); opacity: 0.85;
}
.exam-card:hover { transform: translateY(-2px); border-color: var(--card-border-hover); }
.exam-card:active { transform: translateY(0); }
.ec-top { display: flex; align-items: baseline; gap: 8px; }
.ec-subject {
  font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 6px;
  color: var(--subject-color); border: 1px solid var(--subject-color); flex-shrink: 0;
}
.ec-name { font-size: 15px; font-weight: 600; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ec-score { font-size: 24px; font-weight: 800; color: var(--subject-color); flex-shrink: 0; line-height: 1; }
.ec-meta { margin-top: 5px; font-size: 12px; color: var(--text-sub); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.ec-delta { font-size: 12px; font-weight: 600; }
.ec-delta.up { color: var(--up); }
.ec-delta.down { color: var(--down); }
.ec-delta.same { color: var(--text-sub); }
.ec-tags { margin-top: 7px; display: flex; gap: 6px; flex-wrap: wrap; }
.ec-tag {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  color: var(--down); background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.25);
}
.ec-good {
  font-size: 11px; padding: 2px 8px; border-radius: 999px;
  color: var(--up); background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.25);
}
.ec-flag { font-size: 11px; color: var(--text-soft); }
.ec-photo-badge { font-size: 11px; color: var(--acc-a); }

.empty { text-align: center; color: var(--text-sub); font-size: 13px; padding: 40px 0; }

/* ===== 顶部操作 ===== */
.top-actions {
  position: fixed; top: 10px; right: 10px; z-index: 105;
  display: flex; gap: 8px;
}
.round-btn {
  width: 36px; height: 36px; border-radius: 50%; font-size: 16px; line-height: 1; cursor: pointer; padding: 0;
  border: 1px solid var(--glass-border); background: var(--pill-bg);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: transform 0.15s, border-color 0.2s;
}
.round-btn:hover { border-color: var(--acc-soft); }
.round-btn:active { transform: scale(0.92); }

.palette {
  position: fixed; top: 54px; right: 10px; z-index: 106;
  display: none; flex-wrap: wrap; gap: 9px; width: 158px; padding: 12px;
  border-radius: 14px; background: var(--pill-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.palette.open { display: flex; }
.palette .swatch {
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid transparent; padding: 0; cursor: pointer; background: var(--sw);
  transition: transform 0.15s;
}
.palette .swatch:hover { transform: scale(1.12); }
.palette .swatch.on { border-color: var(--text); box-shadow: 0 0 0 2px var(--bg); }

/* ===== 弹层通用 ===== */
.overlay {
  display: none; position: fixed; inset: 0; z-index: 150;
  background: var(--overlay-backdrop); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  justify-content: center; align-items: flex-start;
  overflow-y: auto; padding: 40px 14px 30px;
}
.overlay.open { display: flex; }
.sheet {
  position: relative; width: 100%; max-width: 520px;
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 20px; padding: 22px 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.55);
}
.sheet.small { max-width: 340px; margin-top: 12vh; }
.sheet.big { max-width: 560px; }
.sheet-close {
  position: absolute; top: 12px; right: 12px; z-index: 5;
  width: 30px; height: 30px; border-radius: 50%; cursor: pointer;
  border: 1px solid var(--glass-border); background: var(--pill-bg); color: var(--text); font-size: 13px;
}
.sheet-title { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.sheet-tip { font-size: 13px; color: var(--text-sub); margin-bottom: 14px; line-height: 1.6; }

/* ===== 详情 ===== */
.d-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; padding-right: 30px; }
.d-score-wrap { text-align: center; flex-shrink: 0; }
.d-score { font-size: 40px; font-weight: 800; line-height: 1; color: var(--subject-color, var(--acc-a)); }
.d-full { font-size: 12px; color: var(--text-sub); margin-top: 2px; }
.d-title { flex: 1; min-width: 0; }
.d-title h3 { font-size: 17px; font-weight: 700; line-height: 1.4; }
.d-title .d-meta { font-size: 12px; color: var(--text-sub); margin-top: 4px; }
.score-bar { height: 8px; border-radius: 999px; background: var(--input-bg); overflow: hidden; margin: 10px 0 4px; }
.score-bar i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--acc-a), var(--acc-b)); }
.avg-line { font-size: 12px; color: var(--text-soft); }
.d-section { margin-top: 16px; }
.d-section h4 { font-size: 13px; font-weight: 700; color: var(--text-soft); margin-bottom: 8px; letter-spacing: 0.5px; }
.weak-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.weak-table th, .weak-table td { text-align: left; padding: 7px 8px; border-bottom: 1px dashed var(--panel-border); }
.weak-table th { color: var(--text-sub); font-weight: 500; font-size: 12px; }
.weak-table .reason { color: var(--down); }
.good-list { list-style: none; }
.good-list li { font-size: 13px; padding: 5px 0; color: var(--text); }
.good-list li::before { content: '✅ '; }
.d-flags { display: flex; gap: 8px; flex-wrap: wrap; }
.d-flag { font-size: 12px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--panel-border); color: var(--text-soft); }
.d-flag.on { color: var(--up); border-color: rgba(74,222,128,0.35); }
.note-box {
  font-size: 13px; line-height: 1.7; padding: 10px 12px; border-radius: 12px;
  background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text-soft);
}
.note-box + .note-box { margin-top: 8px; }
.note-box b { color: var(--text); font-weight: 600; }
.photo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.photo-grid img {
  width: 100%; height: auto; display: block;
  border-radius: 10px; cursor: pointer;
  border: 1px solid var(--glass-border);
  transition: transform 0.15s;
}
.photo-grid img:hover { transform: scale(1.03); }
.photo-locked {
  padding: 16px; text-align: center; border-radius: 12px; font-size: 13px; color: var(--text-soft);
  border: 1px dashed var(--panel-border); cursor: pointer;
}
.photo-locked:hover { border-color: var(--acc-soft); color: var(--text); }

/* ===== 照片查看器 ===== */
.photo-overlay { padding: 20px; align-items: center; }
.photo-box { position: relative; width: 100%; max-width: 640px; text-align: center; }
.photo-stage img {
  max-width: 100%; max-height: 78vh; border-radius: 14px;
  box-shadow: 0 16px 50px rgba(0,0,0,0.6);
  cursor: zoom-in; transition: transform 0.25s, max-width 0.2s, max-height 0.2s;
}
/* 旋转 90/270 度时宽高约束互换，保证转向后仍在可视区内 */
.photo-stage img.rot-side { max-width: 78vh; max-height: 92vh; }
.photo-stage img.zoomed { cursor: zoom-out; }
.photo-nav { margin-top: 12px; display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
.photo-nav button, .rot-btn {
  padding: 6px 14px; border-radius: 999px; font-size: 12px; cursor: pointer;
  background: var(--pill-bg); border: 1px solid var(--glass-border); color: var(--text);
}
.photo-nav button.on { border-color: var(--acc-soft); color: var(--acc-a); }
.rot-btn { margin-top: 12px; }

/* ===== 家长面板 ===== */
.admin-tabs { display: flex; gap: 6px; margin-bottom: 16px; padding-right: 30px; }
.admin-tab {
  flex: 1; padding: 9px 4px; border-radius: 10px; font-size: 13px; cursor: pointer;
  background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text-soft);
}
.admin-tab.on { color: var(--text); border-color: var(--acc-soft); background: linear-gradient(135deg, var(--acc-tint), var(--acc-glow)); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field span { display: block; font-size: 12px; color: var(--text-sub); margin-bottom: 4px; }
.field .input { width: 100%; }
.span2 { grid-column: span 2; }
.input {
  padding: 9px 11px; border-radius: 10px; font-size: 14px;
  background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text);
  font-family: inherit; outline: none; transition: border-color 0.2s;
}
.input:focus { border-color: var(--acc-soft); }
textarea.input { resize: vertical; }
.file-input { padding: 8px; font-size: 12px; }
.photo-preview { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.photo-preview .pp { position: relative; width: 64px; }
.photo-preview img { width: 64px; height: 80px; object-fit: cover; border-radius: 8px; border: 1px solid var(--glass-border); }
.photo-preview .pp-x {
  position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--down); color: #fff; border: none; font-size: 11px; cursor: pointer; line-height: 1;
}
.tip { font-size: 12px; color: var(--text-sub); margin-top: 6px; line-height: 1.5; }
.err { color: var(--down); font-size: 12px; margin: 8px 0; min-height: 0; }
.err:empty { display: none; }

.sub-title { font-size: 13px; font-weight: 700; color: var(--text-soft); margin: 16px 0 8px; }
.weak-row, .good-row { display: flex; gap: 8px; margin-bottom: 8px; }
.weak-row .input { flex: 1; }
.weak-row .input.w-topic { flex: 2; }
.good-row .input { flex: 1; }
.row-x {
  width: 32px; flex-shrink: 0; border-radius: 10px; cursor: pointer;
  background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--down); font-size: 13px;
}
.check-row { display: flex; gap: 18px; margin: 14px 0; }
.check { font-size: 13px; color: var(--text-soft); display: flex; align-items: center; gap: 6px; cursor: pointer; }
.btn-row { display: flex; gap: 10px; margin-top: 14px; }
.btn {
  padding: 11px 18px; border-radius: 12px; font-size: 14px; font-weight: 600; cursor: pointer;
  border: none; transition: transform 0.15s, box-shadow 0.2s;
}
.btn:active { transform: scale(0.97); }
.btn.primary {
  background: linear-gradient(135deg, var(--acc-a), var(--acc-b));
  color: #0b0d11; flex: 1;
}
.btn.ghost { background: var(--input-bg); border: 1px solid var(--panel-border); color: var(--text-soft); }
.btn.small { padding: 7px 12px; font-size: 12px; font-weight: 500; border-radius: 9px; }
.btn.full { width: 100%; }
.btn.danger { background: rgba(248,113,113,0.12); border: 1px solid rgba(248,113,113,0.35); color: var(--down); font-weight: 500; }

/* 管理列表 */
.manage-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 4px; border-bottom: 1px dashed var(--panel-border);
}
.manage-item .mi-main { flex: 1; min-width: 0; }
.manage-item .mi-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.manage-item .mi-meta { font-size: 12px; color: var(--text-sub); margin-top: 2px; }
.manage-item .mi-score { font-size: 17px; font-weight: 700; color: var(--acc-a); }
.manage-item .mi-ops { display: flex; gap: 6px; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(12px);
  z-index: 300;
  background: var(--toast-bg); border: 1px solid var(--toast-border);
  border-radius: 12px; padding: 12px 22px;
  font-size: 13px; color: var(--toast-text);
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  opacity: 0; transition: opacity 0.35s, transform 0.35s;
  pointer-events: none; white-space: nowrap; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Footer ===== */
.footer { text-align: center; margin-top: 36px; font-size: 12px; color: var(--text-sub); letter-spacing: 0.5px; }

/* ===== Accent Themes ===== */
html[data-accent="pink"]   { --acc-a:#ffb3d1; --acc-b:#ff5c9d; --acc-soft:rgba(255,138,187,.35); --acc-strong:rgba(255,138,187,.65); --acc-glow:rgba(255,138,187,.16); --acc-tint:rgba(255,138,187,.08); }
html[data-accent="blue"]   { --acc-a:#7cc4ff; --acc-b:#5c7cfc; --acc-soft:rgba(106,163,255,.35); --acc-strong:rgba(106,163,255,.65); --acc-glow:rgba(106,163,255,.16); --acc-tint:rgba(106,163,255,.08); }
html[data-accent="green"]  { --acc-a:#8ce8b8; --acc-b:#2fc98e; --acc-soft:rgba(80,210,150,.35); --acc-strong:rgba(80,210,150,.65); --acc-glow:rgba(80,210,150,.15); --acc-tint:rgba(80,210,150,.08); }
html[data-accent="violet"] { --acc-a:#c9a4ff; --acc-b:#8f6bff; --acc-soft:rgba(160,120,255,.35); --acc-strong:rgba(160,120,255,.65); --acc-glow:rgba(160,120,255,.16); --acc-tint:rgba(160,120,255,.08); }
html[data-accent="gray"]   { --acc-a:#c6cdd8; --acc-b:#8a93a6; --acc-soft:rgba(170,180,196,.35); --acc-strong:rgba(170,180,196,.65); --acc-glow:rgba(170,180,196,.14); --acc-tint:rgba(170,180,196,.07); }
html[data-accent="red"]    { --acc-a:#ff9d94; --acc-b:#f2453f; --acc-soft:rgba(255,110,100,.35); --acc-strong:rgba(255,110,100,.65); --acc-glow:rgba(255,110,100,.15); --acc-tint:rgba(255,110,100,.08); }

/* ===== Responsive ===== */
@media (max-width: 400px) {
  .container { padding: 18px 12px 36px; }
  .form-grid { grid-template-columns: 1fr; }
  .span2 { grid-column: span 1; }
  .stats-bar { gap: 6px; }
  .stat-num { font-size: 17px; }
}