/* Mobile first: neutral surfaces, compact lists and direct actions. */
:root {
  color-scheme: light;
  --bg: #ffffff; --surface: #ffffff; --surface2: #f4f4f5;
  --border: #e4e4e7; --border2: #c6c6cd;
  --text: #202024; --text2: #606067; --text3: #71717a;
  --accent: #252529; --accent-bg: #f0f0f2; --accent-light: #c6c6cd; --primary-text: #ffffff;
  --warn: #606067; --warn-bg: #f4f4f5; --danger: #b42332; --danger-bg: #ffffff;
  --info: #606067; --info-bg: #f4f4f5; --purple: #606067; --purple-bg: #f4f4f5;
  --radius: 8px; --radius-sm: 8px; --shadow: none;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #17171a; --surface: #17171a; --surface2: #242428;
    --border: #35353b; --border2: #565660;
    --text: #f4f4f5; --text2: #b4b4bc; --text3: #a0a0aa;
    --accent: #f4f4f5; --accent-bg: #29292e; --accent-light: #565660; --primary-text: #202024;
    --warn: #b4b4bc; --warn-bg: #242428; --danger: #ff929b; --danger-bg: #17171a;
    --info: #b4b4bc; --info-bg: #242428; --purple: #b4b4bc; --purple-bg: #242428;
  }
}
@font-face {
  font-family: "StudyCoPi Japanese";
  src: url("assets/fonts/noto_sans_jp.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
body { font-family: "StudyCoPi Japanese", "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif; font-size: 15px; line-height: 1.55; min-height: 100dvh; }
button,input,select,textarea { font: inherit; }
button { touch-action: manipulation; cursor: pointer; }
button:disabled { opacity: .4; cursor: default; }
[hidden] { display: none !important; }
:is(button,input,select,textarea,summary,a):focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }
input:focus,select:focus,textarea:focus { border-color: var(--text); }
h1,h2,h3 { line-height: 1.35; }
p { overflow-wrap: anywhere; }
.app { display: block; min-height: 100dvh; }
.sidebar { display: none; }
.main { width: 100%; max-width: 760px; min-width: 0; margin: 0 auto; padding: 20px 16px calc(96px + env(safe-area-inset-bottom)); }
.mobile-header { display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; padding: 8px 16px; padding-top: max(8px,env(safe-area-inset-top)); min-height: 56px; z-index: 50; background: var(--surface); border-bottom: 1px solid var(--border); }
.mobile-header h1 { font-size: 17px; font-weight: 650; letter-spacing: -.3px; }
.mobile-header .btn { min-height: 44px; padding: 8px 14px; }
body:not([data-view="dashboard"]):not([data-view="schedule"]):not([data-view="examgroups"]) #quick-add { visibility: hidden; }
.view-title { font-size: 26px; font-weight: 700; letter-spacing: -.5px; margin-bottom: 4px; }
.view-subtitle { font-size: 13px; color: var(--text2); margin: 4px 0 18px; }
.page-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.page-heading > .btn,.desktop-add { display: none; }
.section-title { font-size: 17px; font-weight: 650; }
.section-header { display: flex; flex-direction: row; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.muted { font-size: 13px; color: var(--text2); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border2); background: var(--surface); color: var(--text); font-size: 14px; font-weight: 550; line-height: 1.35; transition: background .12s; }
.btn:hover { background: var(--surface2); }
.btn-primary,.btn-primary:hover { background: var(--accent); color: var(--primary-text); border-color: var(--accent); opacity: 1; }
.btn-quiet { background: transparent; border-color: transparent; color: var(--text2); }
.btn-sm { min-height: 44px; font-size: 13px; padding: 9px 12px; }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--border2); }
.btn-resuming { color: var(--primary-text) !important; animation: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin-bottom: 0; }
input,select,textarea { font-size: 16px; min-height: 46px; padding: 10px 12px; border: 1px solid var(--border2); border-radius: 8px; background: var(--surface); color: var(--text); max-width: 100%; }
input[type="checkbox"],input[type="radio"] { width: 22px; height: 22px; min-height: 22px; accent-color: var(--accent); flex-shrink: 0; }
input[type="color"] { width: 64px; padding: 4px; }
.form-group { display: flex; flex-direction: column; gap: 6px; min-width: 0; margin-bottom: 8px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text); }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.form-full { grid-column: 1/-1; }
.filter-field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--text2); width: 100%; }
.filter-field select { width: 100%; }
.badge { border-radius: 3px; background: var(--surface2); color: var(--text2); font-size: 12px; font-weight: 500; padding: 3px 7px; }
.subject-dot { width: 7px; height: 7px; margin-right: 7px; flex-shrink: 0; }
.today-summary { display: flex; align-items: center; gap: 32px; padding: 14px 0 18px; margin-bottom: 4px; border-bottom: 1px solid var(--border); }
.today-summary > div { display: flex; align-items: baseline; gap: 10px; }
.today-summary span { font-size: 12px; color: var(--text2); }
.today-summary strong { font-size: 21px; font-weight: 650; }
.today-summary small { font-size: 13px; color: var(--text2); font-weight: 400; }
.study-list { display: block; }
.study-card { display: grid; grid-template-columns: 44px minmax(0,1fr) 54px; align-items: center; column-gap: 9px; padding: 14px 0; border-bottom: 1px solid var(--border); background: transparent; border-radius: 0; min-width: 0; }
.study-check { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; background: transparent; border: none; color: var(--text); position: relative; isolation: isolate; font-size: 18px; }
.study-check::before { content: ""; position: absolute; width: 22px; height: 22px; border: 1.5px solid var(--border2); border-radius: 5px; z-index: -1; }
.study-check[aria-pressed="true"] { color: var(--primary-text); }
.study-check[aria-pressed="true"]::before { background: var(--accent); border-color: var(--accent); }
.study-body { min-width: 0; }
.study-title-button { display: block; width: 100%; min-height: 44px; background: none; border: none; padding: 0; text-align: left; color: var(--text); }
.study-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.study-subject { display: flex; align-items: center; font-size: 16px; font-weight: 650; overflow-wrap: anywhere; }
.study-time { font-size: 13px; font-weight: 500; color: var(--text2); white-space: nowrap; font-variant-numeric: tabular-nums; }
.study-content { display: block; font-size: 14px; color: var(--text); overflow-wrap: anywhere; margin-top: 3px; }
.study-meta { display: flex; flex-wrap: wrap; gap: 3px 10px; color: var(--text2); font-size: 12px; margin-top: 5px; }
.exam-link-label { font-size: 12px; color: var(--text2); margin-top: 2px; overflow-wrap: anywhere; }
.study-actions { display: flex; flex-direction: column; gap: 2px; }
.study-actions .btn { min-width: 54px; min-height: 44px; padding: 8px 5px; font-size: 13px; }
.study-finished .study-title-button,.study-finished .study-meta { color: var(--text2); }
summary { cursor: pointer; min-height: 44px; padding: 12px 0; font-size: 13px; color: var(--text2); font-weight: 550; }
.completed-list { margin-top: 12px; }
.all-done { color: var(--text2); padding: 20px 0; }
.empty-state { padding: 24px 0; text-align: left; background: none; color: var(--text2); font-size: 14px; }
.empty-state p { margin-bottom: 14px; }
.exam-home-card { display: flex; align-items: center; justify-content: space-between; gap: 18px; width: 100%; padding: 18px 0; margin-top: 22px; background: none; border: 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); text-align: left; color: var(--text); }
.exam-home-card small { display: block; font-size: 12px; font-weight: 400; color: var(--text2); margin-bottom: 4px; }
.exam-home-card strong { font-size: 15px; overflow-wrap: anywhere; }
.exam-home-card > span:last-child { font-size: 12px; color: var(--text2); flex-shrink: 0; }
.week-summary { display: flex; align-items: center; gap: 12px; width: 100%; padding: 16px 0; border: 0; background: none; color: var(--text2); font-size: 12px; text-align: left; }
.week-summary strong { font-size: 16px; font-weight: 650; color: var(--text); }
.week-summary > span:last-child { margin-left: auto; }
.schedule-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.filter-panel { border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.filter-panel > summary { display: flex; justify-content: space-between; }
.filter-panel > summary::after { content: "+"; font-size: 18px; }
.filter-panel[open] > summary::after { content: "−"; }
.filter-panel .btn-row { padding: 8px 0 18px; }
.filter-panel .btn-row > select { width: calc(50% - 5px) !important; flex: 1; min-width: 0; }
.list-summary { font-size: 12px; color: var(--text2); margin: 14px 0; }
.schedule-day { margin-bottom: 20px; }
.day-heading { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.day-heading > span:last-child { margin-left: auto; font-size: 12px; font-weight: 400; color: var(--text2); }
.day-today { font-size: 12px; color: var(--text2); font-weight: 400; }
.day-items { display: block; }
.past-archive { padding-top: 8px; border-top: 1px solid var(--border); }
.exam-toolbar { margin: 12px 0 18px; }
.exam-toolbar .muted { display: block; margin-top: 8px; font-size: 12px; }
.exam-group-card { padding: 20px 0; border-bottom: 1px solid var(--border); background: none; }
.exam-group-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.exam-group-card h2 { font-size: 21px; font-weight: 650; overflow-wrap: anywhere; margin-bottom: 4px; }
.exam-metrics { display: flex; flex-wrap: wrap; gap: 16px; margin: 14px 0; }
.exam-metrics > div { display: flex; flex-direction: column; gap: 3px; }
.exam-metrics span { font-size: 11px; color: var(--text2); }
.exam-metrics strong { font-size: 16px; font-weight: 600; }
.exam-group-actions { display: flex; gap: 8px; }
.exam-group-actions .btn { flex: 1; font-size: 13px; padding-inline: 6px; }
.exam-group-actions .btn-quiet { flex: 0 0 44px; }
.exam-sessions { margin-top: 8px; }
.exam-session { display: flex; align-items: start; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.exam-session h3 { font-size: 15px; margin: 4px 0; }
.exam-session p { font-size: 13px; }
.exam-session .btn { flex-shrink: 0; }
.exam-grid { display: block; }
.panel { padding: 20px 0; margin-top: 16px; }
.panel p { margin: 8px 0 12px; }
.hours-period-bar { gap: 12px; }
.card { padding: 16px; border: 1px solid var(--border); border-radius: 8px; }
.stats-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; margin: 20px 0; }
.stat-card { background: none; border: none; border-radius: 0; padding: 0; }
.stat-label { font-size: 12px; color: var(--text2); margin-bottom: 6px; }
.stat-value { font-size: 21px; font-weight: 650; overflow-wrap: anywhere; }
.stat-unit { font-size: 12px; }
#hours-context { color: var(--text2); font-size: 12px; margin: 14px 0; }
.hours-row { padding: 14px 0; }
.hours-row + .hours-row { border-top: 1px solid var(--border); }
.hours-row-title { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.hours-row-title strong { font-size: 15px; }
.hours-row-title span { font-size: 12px; color: var(--text2); }
.hours-measure { display: grid; grid-template-columns: 26px minmax(0,1fr) 106px; gap: 8px; align-items: center; margin: 7px 0; font-size: 12px; }
.hours-measure strong { text-align: right; font-weight: 550; }
.hours-track { background: var(--surface2); height: 5px; border-radius: 2px; overflow: hidden; }
.hours-track > div { height: 100%; border-radius: inherit; }
.hours-toggle-row { gap: 6px; }
.hours-toggle-btn { opacity: 1; flex: 1; }
.hours-toggle-btn.active { background: var(--accent); color: var(--primary-text); border-color: var(--accent); }
.focus-setup .card { border: none; padding: 8px 0; max-width: 460px !important; }
.focus-active { padding: 32px 0; }
.focus-subject-label { font-size: 18px; }
.focus-timer-display { font-size: clamp(64px,15vw,90px); font-variant-numeric: tabular-nums; letter-spacing: -1px; }
.focus-progress-ring { display: none; }
.focus-preset-btn.active { background: var(--accent); color: var(--primary-text); border-color: var(--accent); }
.focus-elapsed { font-size: 14px; margin: 20px 0; }
.focus-fs-timer { font-size: clamp(64px,18vw,96px); letter-spacing: -1px; }
.more-menu { display: block; }
.more-menu > button { width: 100%; padding: 18px 0; display: flex; flex-direction: column; gap: 4px; background: none; color: var(--text); border: 0; border-bottom: 1px solid var(--border); text-align: left; }
.more-menu strong { font-size: 16px; font-weight: 600; }
.more-menu span { font-size: 13px; color: var(--text2); }
.settings-section { padding: 18px 0; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.subject-reorder { display: flex; gap: 4px; }
.color-pick { width: 44px; height: 44px; border-radius: 8px; }
.color-pick.selected { outline: 2px solid var(--text); outline-offset: 2px; border-color: var(--surface); }
.notif-toggle-title { font-size: 14px; }
.notif-toggle-desc { font-size: 12px; color: var(--text2); }
.notif-sub-option input { width: 140px !important; }
.table-wrap { overflow-x: auto; }
td { font-size: 14px; }
.modal-open { overflow: hidden; }
.modal-backdrop { z-index: 2000; padding: 0; align-items: flex-end; background: rgb(0 0 0 / .35); top: var(--visual-top,0px); bottom: auto; height: var(--visual-height,100dvh); }
.modal { width: 100%; max-width: 560px; margin: 0 auto; padding: 0; max-height: calc(var(--visual-height,100dvh) - 12px); border: none; border-radius: 12px 12px 0 0; overscroll-behavior: contain; }
.modal-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 2; }
.modal-header h2 { font-size: 18px; }
#modal-form > .form-grid { padding: 16px; }
.modal-footer { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 16px max(12px,env(safe-area-inset-bottom)); margin: 0; border-top: 1px solid var(--border); background: var(--surface); position: sticky; bottom: 0; z-index: 2; }
.modal-footer .btn { flex: 1; }
.modal-footer .btn-danger { flex: 0 0 auto; }
.duration-presets { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 6px; }
.duration-presets .btn { padding-inline: 4px; }
.optional-fields { border-top: 1px solid var(--border); }
.optional-fields .form-group { margin: 10px 0; }
.form-error { color: var(--danger); font-size: 13px; margin: 0 16px 12px; }
.record-status { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 6px; border: 0; }
.record-status legend { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.record-status label { cursor: pointer; }
.record-status input { position: absolute; opacity: 0; width: 1px; height: 1px; min-height: 0; }
.record-status span { display: block; min-height: 44px; border: 1px solid var(--border2); border-radius: 8px; padding: 10px 4px; text-align: center; }
.record-status input:checked + span { background: var(--accent); color: var(--primary-text); border-color: var(--accent); }
.record-status input:focus-visible + span { outline: 2px solid var(--text); outline-offset: 2px; }
.mobile-bottom-nav { position: fixed; bottom: 0; left: 0; right: 0; display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 0; padding: 4px 8px max(6px,env(safe-area-inset-bottom)); background: var(--surface); border-top: 1px solid var(--border); z-index: 100; }
.mobile-bottom-nav button { min-height: 48px; font-size: 13px; font-weight: 500; padding: 10px 2px; background: none; color: var(--text2); border: 0; position: relative; }
.mobile-bottom-nav button.active { color: var(--text); font-weight: 700; }
.mobile-bottom-nav button.active::before { content: ""; position: absolute; top: 0; left: 32%; right: 32%; height: 2px; background: var(--text); }
.running-focus { position: fixed; left: 12px; right: 12px; bottom: calc(70px + env(safe-area-inset-bottom)); z-index: 99; background: var(--accent); color: var(--primary-text); border: none; border-radius: 8px; min-height: 48px; display: flex; align-items: center; gap: 12px; padding: 10px 14px; font-size: 13px; }
.running-focus > span:last-child { margin-left: auto; font-size: 12px; }
.running-focus strong { font-size: 16px; font-variant-numeric: tabular-nums; }
body[data-view="focus"] .running-focus { display: none; }
.timer-running .main { padding-bottom: calc(150px + env(safe-area-inset-bottom)); }
.toast { position: fixed; left: 12px; right: 12px; bottom: calc(72px + env(safe-area-inset-bottom)); z-index: 3000; display: flex; align-items: center; gap: 12px; padding: 9px 14px; background: var(--accent); color: var(--primary-text); border-radius: 8px; font-size: 13px; }
.timer-running .toast { bottom: calc(130px + env(safe-area-inset-bottom)); }
.toast button { min-height: 44px; border: 0; padding: 4px 0; margin-left: auto; background: none; color: inherit; white-space: nowrap; font-weight: 600; }
.week-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.week-label { order: -1; flex: 1 1 100%; min-width: 0; font-size: 16px; text-align: left; }
.tt-mode-buttons { display: flex; gap: 8px; width: 100%; }
.tt-mode-buttons .btn { flex: 1; }
.tt-mode-buttons .btn[aria-pressed="true"] { background: var(--accent); color: var(--primary-text); border-color: var(--accent); }
.tt2-wrap { max-height: 70dvh; }
.tt2-axis { position: sticky; left: 0; z-index: 4; }
.tt2-col { min-width: 160px; }
.tt2-block { box-shadow: none; min-height: 56px; height: auto; padding: 8px; gap: 4px; border: 1px solid var(--border); background: var(--surface); color: var(--text); text-align: left; font: inherit; }
.tt2-block-name { white-space: normal; overflow: visible; overflow-wrap: anywhere; font-size: 13px; line-height: 1.5; }
.tt2-block-name::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 5px; background: var(--subject-color); border-radius: 50%; vertical-align: middle; }
.tt2-block-time { font-size: 11px; line-height: 1.6; opacity: 1; color: var(--text2); white-space: normal; }
.tt2-block:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; z-index: 2; }
.tt2-col-header { position: sticky; top: 0; z-index: 3; }
.tt2-col-header { font-size: 13px; }
.tt2-block-content { display: block; }
.day-selector { display: grid; grid-template-columns: repeat(7,minmax(0,1fr)); gap: 4px; margin-bottom: 14px; }
.day-selector button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-height: 60px; padding: 4px 2px; background: none; border: none; border-radius: 8px; color: var(--text2); }
.day-selector button.selected { background: var(--accent); color: var(--primary-text); }
.day-selector span { font-size: 12px; }
.day-selector strong { font-size: 18px; }
.help-content h2 { font-size: 18px; margin: 24px 0 10px; }
.help-content :is(ol,ul) { padding-left: 22px; }
.help-content li { margin: 10px 0; }
.help-content details { border-bottom: 1px solid var(--border); padding-bottom: 10px; }
@media (min-width: 1024px) {
  .mobile-header,.mobile-bottom-nav { display: none; }
  .sidebar { display: flex; width: 220px; padding: 12px; height: 100dvh; }
  .sidebar-logo { padding: 18px 12px; }
  .sidebar-logo h1 { font-size: 21px; }
  .sidebar-logo span { font-size: 12px; }
  .nav-item { width: 100%; text-align: left; min-height: 44px; padding: 10px 12px; border: 0; background: none; border-radius: 8px; font-size: 14px; }
  .nav-item.active { border: 0; background: var(--surface2); color: var(--text); }
  .main { margin-left: 220px; max-width: 980px; padding: 36px 48px 80px; width: calc(100% - 220px); }
  .desktop-add,.page-heading > .btn { display: inline-flex; }
  .study-card { column-gap: 14px; grid-template-columns: 44px minmax(0,1fr) 128px; }
  .study-actions { flex-direction: row; gap: 6px; }
  .study-actions .btn { min-width: 60px; }
  .modal-backdrop { align-items: center; padding: 24px; }
  .modal { border-radius: 12px; max-height: calc(var(--visual-height,100dvh) - 48px); }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .filter-panel .filter-field { max-width: 300px; }
  .running-focus { left: 250px; right: auto; width: min(580px,calc(100% - 280px)); bottom: 18px; }
  .toast { left: 250px; right: auto; max-width: 580px; width: max-content; bottom: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}