*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { touch-action: manipulation; }

:root {
  --bg: #f4f5fb; --fg: #1c1c2e;
  --box-bg: rgba(255,255,255,0.85);
  --inp-bg: #fff; --inp-border: #d8dae8;
  --primary: #4f46e5; --primary-dark: #4338ca;
  --success: #10b981; --danger: #ef4444;
  --muted: #6b7280; --max-w: 500px;
  --shadow: 0 1px 2px rgba(30,27,75,0.04), 0 6px 16px rgba(30,27,75,0.06);
}
[data-theme="dark"] {
  --bg: #0c0c14; --fg: #f2f2f7;
  --box-bg: rgba(28,28,36,0.85);
  --inp-bg: #1c1c26; --inp-border: #34344a;
  --primary: #818cf8; --primary-dark: #6366f1; --muted: #9a9ab0;
  --shadow: 0 1px 2px rgba(0,0,0,0.2), 0 6px 16px rgba(0,0,0,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg); color: var(--fg);
  max-width: var(--max-w); margin: 0 auto;
  padding: env(safe-area-inset-top) 15px 30px;
  min-height: 100vh;
}
@media (min-width: 768px) {
  :root { --max-w: 1100px; }
  body { padding: 32px 40px 48px; }
  .nav-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .desktop-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 20px; align-items: start;
  }
  .desktop-grid .span-full { grid-column: 1 / -1; }
  .desktop-grid .left-col, .desktop-grid .right-col {
    display: flex; flex-direction: column;
  }
}

.top-bar {
  display: flex; align-items: center; justify-content: space-between;
  margin: 20px 0 12px; flex-wrap: wrap; gap: 10px;
}
.top-bar h1 { font-size: 28px; font-weight: 700; cursor: pointer; margin-left: 10px; }
.top-bar h1 span {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.top-controls { display: flex; gap: 8px; }
.tagline { font-size: 13px; color: var(--muted); margin: -6px 0 8px 10px; }
.site-footer {
  text-align: center; font-size: 12px; color: var(--muted);
  margin-top: 32px; padding: 16px 0; line-height: 1.8;
}

.feedback-widget {
  text-align: center; font-size: 18px; color: var(--muted);
  padding: 6px 0 20px; display: flex; align-items: center; justify-content: center; gap: 12px;
}
.feedback-widget button {
  font-size: 18px; padding: 5px 12px; border-radius: 10px;
  border: none; background: transparent; color: var(--fg); cursor: pointer;
}
.feedback-widget button.active { color: var(--primary); }

.article h2 { font-size: 19px; margin: 24px 0 8px; color: var(--fg); }
.article h2:first-child { margin-top: 0; }
.article p { font-size: 15px; line-height: 1.8; color: var(--fg); margin-bottom: 12px; }
.article ul { margin: 0 0 12px 20px; font-size: 15px; line-height: 1.8; color: var(--fg); }
.article .updated { font-size: 12px; color: var(--muted); margin-bottom: 16px; }
.legal h2 { font-size: 16px; margin: 20px 0 6px; color: var(--fg); }
.legal p, .legal li { font-size: 14px; line-height: 1.8; color: var(--muted); }
.legal ul { margin: 0 0 10px 20px; }
.footer-links { text-align: center; font-size: 12px; margin-top: 8px; }
.footer-links a { color: var(--muted); text-decoration: underline; margin: 0 6px; }

.nav-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.nav-tab {
  flex: 1; min-width: 120px; height: 40px;
  font-size: 15px; font-weight: 600; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--inp-border); background: var(--inp-bg); color: var(--fg);
  text-decoration: none; display: flex; align-items: center; justify-content: center;
}
.nav-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.top-controls button, .btn-outline {
  background: transparent; color: var(--primary);
  border: 1px solid var(--primary); border-radius: 8px;
  font-size: 14px; height: 30px; line-height: 28px;
  padding: 0 10px; cursor: pointer;
}

.box {
  background: var(--box-bg); backdrop-filter: blur(20px);
  border-radius: 16px; padding: 20px; margin-bottom: 20px;
  border: 1px solid rgba(255,255,255,0.6);
  box-shadow: var(--shadow);
}
[data-theme="dark"] .box { border-color: rgba(255,255,255,0.1); }

.subject-picker > label { display: block; font-size: 15px; color: var(--muted); margin-bottom: 10px; }
.subject-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.subject-chip {
  padding: 8px 14px; border-radius: 20px; font-size: 14px; font-weight: 500;
  cursor: pointer; border: 1px solid var(--inp-border);
  background: var(--inp-bg); color: var(--fg);
}
.subject-chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.count-container { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.count-container .half { min-width: 0; }
.count-container .half label { display: block; font-size: 15px; color: var(--muted); margin-bottom: 6px; }
.count-container .half input {
  width: 100%; height: 44px; padding: 0 12px; font-size: 16px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
  border-radius: 10px; color: var(--fg);
}
.count-container .half input:disabled { opacity: 0.6; }

.stepper {
  display: flex; align-items: center; height: 44px; width: 100%; min-width: 0;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
  border-radius: 10px; overflow: hidden;
}
.stepper input {
  flex: 1; min-width: 0; width: auto !important; height: 100% !important;
  border: none !important; background: transparent !important; padding: 0 !important;
  text-align: center; font-size: 17px; font-weight: 700;
  -moz-appearance: textfield;
}
.stepper input::-webkit-outer-spin-button,
.stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.stepper-btn {
  flex-shrink: 0; width: 40px; height: 100%; border: none;
  background: transparent; color: var(--primary);
  font-size: 20px; font-weight: 700; cursor: pointer;
}
.stepper-btn:active { background: var(--bg); }
.stepper-btn:first-child { border-right: 1px solid var(--inp-border); }
.stepper-btn:last-child { border-left: 1px solid var(--inp-border); }

.modal-section {
  background: var(--bg); border-radius: 12px; padding: 16px; margin-bottom: 16px;
}
.modal-section > *:last-child { margin-bottom: 0; }

.weight-row { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.weight-row label { flex-shrink: 0; width: auto; white-space: nowrap; font-size: 14px; color: var(--fg); }
.weight-row .weight-memo, .weight-row .weight-spacer {
  flex: 1; min-width: 0;
}
.weight-row input[type="text"] {
  width: 100%; height: 38px; padding: 0 10px; font-size: 14px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
  border-radius: 8px; color: var(--fg);
}
.weight-row .weight-pct {
  flex-shrink: 0; display: flex; align-items: center; gap: 6px;
}
.weight-row .pct-step {
  flex-shrink: 0; width: 32px; height: 38px; border-radius: 8px;
  border: 1px solid var(--inp-border); background: var(--inp-bg);
  color: var(--primary); font-size: 18px; font-weight: 700; cursor: pointer;
}
.weight-row .pct-step:active { background: var(--bg); }
.weight-row input[type="number"] {
  flex-shrink: 0; width: 48px; height: 38px; padding: 0; text-align: center;
  font-size: 15px; background: var(--inp-bg); border: 1px solid var(--inp-border);
  border-radius: 8px; color: var(--fg);
}
.weight-row input[type="number"]::-webkit-outer-spin-button,
.weight-row input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.weight-row input[type="number"] { -moz-appearance: textfield; }

.weight-bar {
  padding: 10px 14px; border-radius: 10px; margin-bottom: 14px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
  font-size: 14px;
}
.weight-bar .weight-bar-top { display: flex; justify-content: space-between; margin-bottom: 8px; }
.weight-bar .weight-track { height: 6px; border-radius: 3px; background: var(--bg); overflow: hidden; }
.weight-bar .weight-fill { height: 100%; border-radius: 3px; background: var(--primary); transition: width .2s; }
.weight-bar.ok .weight-fill { background: var(--success); }
.weight-bar.over-limit { border-color: var(--danger); }
.weight-bar.over-limit .weight-bar-top strong { color: var(--danger); }
.weight-bar.over-limit .weight-fill { background: var(--danger); }
.schoolinfo-link {
  display: block; font-size: 13px; color: var(--primary);
  margin-bottom: 14px; text-decoration: none;
}

.beta-badge {
  font-size: 10px; font-weight: 700; color: #fff;
  background: var(--primary); border-radius: 6px;
  padding: 2px 6px; margin-left: 6px; vertical-align: middle;
}
.ai-result p { font-size: 14px; line-height: 1.6; margin-bottom: 8px; }
.ai-result p:last-child { margin-bottom: 0; }

.entry {
  display: grid; grid-template-columns: 100px 1fr;
  grid-template-rows: auto auto; column-gap: 8px;
  row-gap: 8px; align-items: center; margin-bottom: 16px;
}
.entry label { font-size: 15px; color: var(--muted); }
.entry input[type="number"], .entry input[type="text"] {
  width: 100%; height: 44px; padding: 0 12px; font-size: 16px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
  border-radius: 10px; color: var(--fg);
}
.entry input::placeholder { color: rgba(142,142,147,0.45); }
[data-theme="dark"] .entry input::placeholder { color: rgba(152,152,157,0.4); }

.score-row { display: flex; gap: 8px; align-items: center; }
.score-row input { flex: 1; }
.if-btn {
  flex-shrink: 0; width: 44px; height: 44px;
  border-radius: 10px; border: 1px solid var(--inp-border);
  background: var(--inp-bg); color: var(--muted);
  font-size: 13px; font-weight: 700; cursor: pointer;
}
.if-btn.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.if-btn.active + .if-hint { display: block; }
.entry.if-mode input.exam-score { opacity: 0.5; }

.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.section-head h2 { font-size: 18px; }
.mini-btn {
  font-size: 12px; padding: 4px 10px; border-radius: 6px;
  border: 1px solid var(--inp-border); background: var(--inp-bg);
  color: var(--primary); cursor: pointer;
}

.btn {
  display: block; width: 100%; height: 44px;
  font-size: 17px; font-weight: 600; text-align: center;
  border-radius: 12px; margin: 12px 0; line-height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; border: none; cursor: pointer;
  box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}

#result {
  font-size: 16px; line-height: 1.6; margin-bottom: 20px; word-break: keep-all;
}
.result-main { text-align: center; margin-bottom: 16px; font-size: 17px; }
.sim-box {
  background: var(--inp-bg); border-radius: 12px;
  border: 1px solid var(--inp-border); padding: 14px; margin-top: 12px;
}
.sim-box h4 { font-size: 15px; margin-bottom: 10px; color: var(--primary); }
.sim-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px;
}
@media (max-width: 400px) { .sim-grid { grid-template-columns: repeat(3, 1fr); } }
.sim-cell {
  text-align: center; padding: 8px 4px; border-radius: 8px;
  background: var(--bg); font-size: 13px;
}
.sim-cell .sc { font-weight: 700; font-size: 15px; }
.sim-cell .gr { font-size: 12px; margin-top: 2px; }

.target-box {
  margin-top: 14px; padding: 14px; border-radius: 12px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
}
.target-box h4 { font-size: 15px; margin-bottom: 10px; }
.target-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.target-chip {
  padding: 8px 12px; border-radius: 8px; font-size: 13px;
  background: var(--bg); border: 1px solid var(--inp-border);
}

.history-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px;
}
.history-header span { font-size: 17px; font-weight: 600; }

.empty-hint { text-align: center; color: var(--muted); font-size: 14px; padding: 16px 0; width: 100%; }
.subj-list-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-radius: 10px; margin-bottom: 8px; cursor: pointer;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
}
.subj-list-item.active { border-color: var(--primary); background: rgba(79,70,229,0.08); }
[data-theme="dark"] .subj-list-item.active { background: rgba(129,140,248,0.14); }
.subj-list-item .meta { font-size: 13px; color: var(--muted); margin-top: 2px; }
.subj-list-actions button { margin-left: 6px; }

.table-container {
  background: var(--inp-bg); border-radius: 12px;
  overflow-x: auto; box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.record-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.record-table th, .record-table td { padding: 10px 3px; text-align: center; font-size: 13px; }
.record-table th:nth-child(1), .record-table td:nth-child(1) { width: 18%; }
.record-table th:nth-child(2), .record-table td:nth-child(2) { width: 26%; }
.record-table th:nth-child(3), .record-table td:nth-child(3) { width: 14%; }
.record-table th:nth-child(4), .record-table td:nth-child(4) { width: 14%; }
.record-table th:nth-child(5), .record-table td:nth-child(5) { width: 14%; }
.record-table th:nth-child(6), .record-table td:nth-child(6) { width: 14%; }
.record-table tbody tr:nth-child(even) td { background: var(--bg); }
.record-table td.subject { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
[data-theme="dark"] .record-table tbody tr:nth-child(even) td { background: var(--inp-bg); }
.record-table .delete-btn, .record-table .info-btn { padding: 3px 5px; font-size: 12px; }
@media (min-width: 768px) {
  .record-table { min-width: 460px; }
  .record-table th, .record-table td { padding: 12px 8px; font-size: 14px; }
  .record-table .delete-btn, .record-table .info-btn { padding: 4px 8px; font-size: 13px; }
}

.delete-btn {
  background: var(--danger); color: #fff; border: none;
  border-radius: 6px; padding: 4px 8px; font-size: 13px; cursor: pointer;
}
.info-btn {
  background: var(--primary); color: #fff; border: none;
  border-radius: 6px; padding: 4px 8px; font-size: 13px; cursor: pointer;
}

.modal {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  align-items: center; justify-content: center; padding: 20px; z-index: 1000;
}
.modal-content {
  background: var(--inp-bg); border-radius: 16px; width: 100%; max-width: 500px;
  max-height: 90%; overflow-y: auto; padding: 20px; position: relative;
}
.modal-close-btn {
  position: absolute; top: 12px; right: 12px; z-index: 1;
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); border: 1px solid var(--inp-border);
  font-size: 16px; line-height: 1; color: var(--fg); cursor: pointer;
}
.table-group { border-radius: 12px; overflow: hidden; margin-bottom: 20px; }
.table-group table { width: 100%; border-collapse: collapse; background: var(--inp-bg); }
.table-group th, .table-group td { padding: 16px; font-size: 16px; text-align: left; }
.table-group tr:not(:last-child) td { border-bottom: 1px solid rgba(0,0,0,0.1); }

#graphView { display: none; }
.graph-summary { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 20px; }
@media (min-width: 768px) { .graph-summary { grid-template-columns: repeat(3, 1fr); } }
.summary-card {
  background: var(--inp-bg); border-radius: 12px; padding: 16px;
  border: 1px solid var(--inp-border); text-align: center;
}
.summary-card .subj { font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.summary-card .score { font-size: 28px; font-weight: 700; }
.summary-card.empty .score { font-size: 18px; color: var(--muted); font-weight: 500; }

.grade-stats {
  display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 16px; font-size: 14px;
}
.grade-stat { padding: 6px 12px; border-radius: 8px; background: var(--inp-bg); border: 1px solid var(--inp-border); }

.chart-wrap {
  background: var(--inp-bg); border-radius: 12px;
  padding: 20px 16px; border: 1px solid var(--inp-border);
}
.chart-wrap h3 { font-size: 17px; margin-bottom: 16px; text-align: center; }
#scoreChart { width: 100%; height: 320px; display: block; }
@media (min-width: 768px) { #scoreChart { height: 400px; } }
.avg-box { margin-top: 16px; text-align: center; font-size: 17px; line-height: 1.6; }

.rank-box {
  margin-top: 16px; padding: 14px; border-radius: 12px;
  background: var(--box-bg); border: 1px solid var(--inp-border);
}
.rank-box h4 { font-size: 15px; margin-bottom: 10px; }
.rank-item {
  display: flex; justify-content: space-between; padding: 8px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06); font-size: 14px;
}
.rank-item:last-child { border-bottom: none; }

@media (max-width: 400px) {
  .count-container { grid-template-columns: 1fr; }
  .entry { grid-template-columns: 100% !important; }
  .graph-summary { grid-template-columns: 1fr; }
}

.ad-desktop, .ad-mobile { text-align: center; margin-top: 20px; }
.ad-mobile { display: block; }
.ad-desktop { display: none; }
@media (min-width: 768px) {
  .ad-mobile { display: none; }
  .ad-desktop { display: block; }
}

.ad-side { display: none; position: fixed; top: 50%; transform: translateY(-50%); }
.ad-side.left { left: 20px; }
.ad-side.right { right: 20px; }
@media (min-width: 1440px) {
  .ad-side { display: block; }
}

.ad-mobile-top, .ad-mobile-strip { display: block; text-align: center; margin: 16px 0; }
@media (min-width: 768px) {
  .ad-mobile-top, .ad-mobile-strip { display: none; }
}

.site-banner {
  display: flex; gap: 12px; flex-wrap: wrap;
}
.site-banner a {
  flex: 1; min-width: 200px; display: block; text-decoration: none;
  padding: 16px; border-radius: 12px; text-align: center;
  background: var(--inp-bg); border: 1px solid var(--inp-border); color: var(--fg);
  font-weight: 600; font-size: 15px;
}
.site-banner a:hover { border-color: var(--primary); }
.site-banner a .emoji { font-size: 20px; display: block; margin-bottom: 6px; }

.school-current {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-radius: 10px; margin-bottom: 14px;
  background: var(--inp-bg); border: 1px solid var(--inp-border);
}
.school-current .meta { font-size: 13px; color: var(--muted); margin-top: 2px; }
.school-actions { display: flex; gap: 6px; flex-shrink: 0; }

.date-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; margin-bottom: 16px;
}
.date-nav .date-label { font-size: 16px; font-weight: 700; text-align: center; flex: 1; }

.meal-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.meal-tabs button {
  flex: 1; height: 38px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--inp-border); background: var(--inp-bg); color: var(--fg);
  font-size: 14px; font-weight: 600;
}
.meal-tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.mode-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.mode-tabs button {
  flex: 1; height: 38px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--inp-border); background: var(--inp-bg); color: var(--fg);
  font-size: 14px; font-weight: 600;
}
.mode-tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.week-grid {
  display: flex; gap: 10px; overflow-x: auto; padding-bottom: 4px;
}
.week-day { flex: 0 0 130px; }
.week-day-head {
  font-size: 13px; font-weight: 700; text-align: center;
  padding: 6px 0; margin-bottom: 8px; border-radius: 8px;
  background: var(--inp-bg); color: var(--fg);
}
.week-day-head.today { background: var(--primary); color: #fff; }
.week-period-list { list-style: none; }
.week-period-list li {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 4px; font-size: 13px; border-bottom: 1px solid var(--inp-border);
}
.week-period-list li:last-child { border-bottom: none; }
.week-period-list .period-no {
  flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.dish-list { list-style: none; }
.dish-list li {
  padding: 10px 0; font-size: 15px; border-bottom: 1px solid var(--inp-border);
}
.dish-list li:last-child { border-bottom: none; }

.class-inputs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.class-inputs .half label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.class-inputs input {
  width: 100%; height: 40px; padding: 0 10px; font-size: 15px; text-align: center;
  background: var(--inp-bg); border: 1px solid var(--inp-border); border-radius: 8px; color: var(--fg);
}

.period-list { list-style: none; }
.period-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; font-size: 15px; border-bottom: 1px solid var(--inp-border);
}
.period-list li:last-child { border-bottom: none; }
.period-list .period-no {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); color: #fff; font-size: 13px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.notify-row { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--inp-border); }
.notify-row .mini-btn.active { background: var(--primary); color: #fff; }
.notify-row .notify-hint { display: block; font-size: 12px; color: var(--muted); margin-top: 8px; line-height: 1.5; }