:root { color-scheme: light; --bg:#f4f5f7; --surface:#fff; --surface-2:#f8f8fa; --text:#17171b; --muted:#6d6d77; --border:#e5e5ea; --accent:#6956e8; --accent-soft:#eeebff; --success:#2c9a67; --danger:#c94747; --shadow:0 12px 36px rgba(25,20,50,.07); }
[data-theme="dark"] { color-scheme:dark; --bg:#111115; --surface:#1b1b21; --surface-2:#23232b; --text:#f5f4f8; --muted:#a3a1ad; --border:#303039; --accent:#a99cff; --accent-soft:#2e294e; --shadow:0 12px 36px rgba(0,0,0,.22); }
* { box-sizing:border-box; }
body { margin:0; background:var(--bg); color:var(--text); font:15px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,sans-serif; }
button,input,textarea,select { font:inherit; }
button { color:inherit; }
.shell { min-height:100vh; display:grid; grid-template-columns:230px minmax(0,1fr); transition:grid-template-columns .2s ease; }
.shell.sidebar-collapsed { grid-template-columns:78px minmax(0,1fr); }
.sidebar { position:sticky; z-index:10; top:0; height:100vh; padding:24px 18px; background:var(--surface); border-right:1px solid var(--border); display:flex; flex-direction:column; overflow:hidden; }
.sidebar-heading { display:flex; align-items:center; justify-content:space-between; min-height:38px; margin-bottom:24px; }
.brand { color:var(--text); text-decoration:none; white-space:nowrap; font-size:20px; font-weight:800; letter-spacing:-.03em; }
.collapse-button { width:28px; height:28px; flex:0 0 auto; border:1px solid var(--border); border-radius:8px; background:var(--surface-2); color:var(--muted); cursor:pointer; }
.sidebar-collapsed .sidebar { padding-inline:12px; }
.sidebar-collapsed .brand,.sidebar-collapsed .nav-label { display:none; }
.sidebar-collapsed .sidebar-heading { justify-content:center; }
.sidebar-collapsed .collapse-button { transform:rotate(180deg); }
.sidebar-nav,.mobile-drawer nav { display:grid; gap:6px; }
.nav-item { min-width:0; border:0; background:transparent; padding:11px 13px; text-align:left; border-radius:10px; cursor:pointer; display:flex; align-items:center; gap:12px; color:var(--muted); white-space:nowrap; }
.nav-item:hover,.nav-item.active { background:var(--accent-soft); color:var(--accent); }
.nav-icon { width:22px; height:22px; flex:0 0 22px; display:inline-grid; place-items:center; font-size:17px; line-height:1; }
.ai-icon { border:1px solid currentColor; border-radius:6px; font-size:9px; font-weight:800; }
.soon { margin-left:auto; padding:2px 6px; border-radius:999px; background:var(--surface-2); color:var(--muted); font-size:9px; font-weight:750; text-transform:uppercase; }
.nav-divider { height:1px; margin:9px 8px; background:var(--border); }
.sidebar-foot { margin-top:auto; padding:12px; color:var(--muted); font-size:12px; display:flex; align-items:center; gap:8px; white-space:nowrap; }
.status-dot { width:8px; height:8px; flex:0 0 8px; border-radius:50%; background:var(--success); }
.status-dot.neutral { background:var(--muted); }
.bottom-nav,.mobile-drawer,.drawer-backdrop,.menu-button { display:none; }
main { width:min(1440px,100%); min-width:0; margin:0 auto; padding:0 42px 54px; }
.topbar { min-height:112px; display:grid; grid-template-columns:1fr auto; align-items:center; }
.title-group { min-width:0; }
h1,h2,h3,p { margin-top:0; }
h1 { margin-bottom:0; font-size:30px; letter-spacing:-.03em; }
h2 { font-size:20px; letter-spacing:-.02em; }
h3 { font-size:16px; }
.eyebrow { margin-bottom:5px; text-transform:uppercase; letter-spacing:.09em; font-size:11px; font-weight:750; color:var(--accent); }
.muted { color:var(--muted); }
.page { display:none; min-width:0; }
.page.active { display:block; animation:appear .2s ease; }
@keyframes appear { from { opacity:.25; transform:translateY(3px); } }
.card { background:var(--surface); border:1px solid var(--border); border-radius:18px; padding:24px; box-shadow:var(--shadow); }
.card.compact { padding:12px 16px; box-shadow:none; }
.hero { min-height:150px; margin-bottom:20px; display:flex; justify-content:space-between; align-items:center; gap:20px; background:linear-gradient(130deg,var(--surface),var(--accent-soft)); }
.primary,.secondary,.danger { border:0; padding:11px 17px; border-radius:10px; cursor:pointer; font-weight:700; }
.primary { background:var(--accent); color:#fff; }
.secondary { border:1px solid var(--border); background:var(--surface); color:var(--text); }
.danger { border:1px solid color-mix(in srgb,var(--danger) 40%,var(--border)); background:transparent; color:var(--danger); }
.primary:disabled,.secondary:disabled { opacity:.55; cursor:wait; }
.text-button,.icon-button,.menu-button { border:0; background:transparent; color:var(--accent); cursor:pointer; }
.icon-button,.menu-button { width:40px; height:40px; border-radius:10px; font-size:20px; }
.icon-button:hover,.menu-button:hover { background:var(--surface-2); }
.two-columns { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.section-head,.form-foot,.preview-head { display:flex; justify-content:space-between; align-items:center; gap:12px; }
.stack { display:grid; gap:10px; }
.list-item { padding:13px 0; border-top:1px solid var(--border); display:flex; gap:13px; align-items:flex-start; }
.list-item:first-child { border-top:0; }
.time-badge { min-width:55px; color:var(--accent); font-weight:750; }
.list-item h3,.list-item p { margin-bottom:2px; }
.deadline-item { width:100%; border-right:0; border-bottom:0; border-left:0; color:var(--text); background:transparent; text-align:left; cursor:pointer; }
.deadline-item:hover { background:var(--surface-2); }
.empty-copy { color:var(--muted); padding:18px 0; text-align:center; }
.schedule-actions { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:8px; padding:12px 16px; border:1px solid var(--border); border-radius:16px; background:var(--surface); }
.action-group { display:flex; align-items:center; gap:9px; }
.segmented { display:inline-flex; padding:3px; background:var(--surface-2); border-radius:10px; }
.segmented button { border:0; padding:7px 14px; border-radius:8px; background:transparent; cursor:pointer; }
.segmented button.active { background:var(--surface); color:var(--accent); box-shadow:0 2px 9px rgba(0,0,0,.08); }
.field-settings { position:relative; }
.field-settings summary { padding:9px 11px; cursor:pointer; color:var(--accent); }
.popover { position:absolute; z-index:15; right:0; top:44px; width:210px; padding:14px; border:1px solid var(--border); border-radius:12px; background:var(--surface); box-shadow:var(--shadow); display:grid; gap:7px; }
.field-option,.settings-field { display:flex; flex-direction:row; align-items:center; justify-content:space-between; gap:12px; width:100%; min-height:31px; font-weight:550; cursor:pointer; }
.field-option { min-height:36px; padding:4px 0; }
.field-option input,.settings-field input { width:17px; height:17px; margin:0; flex:0 0 auto; accent-color:var(--accent); }
.schedule-hint { margin:10px 4px 14px; font-size:13px; }
.schedule-grid { display:grid; width:100%; max-width:100%; grid-template-columns:repeat(5,minmax(155px,1fr)); gap:12px; padding-top:16px; overflow-x:auto; }
.day-column { min-width:155px; }
.day-heading { position:relative; height:25px; margin:0 0 10px; padding:0 4px; color:var(--muted); font-size:13px; }
.day-heading strong { display:block; color:var(--text); font-size:16px; }
.today-marker { position:absolute; left:4px; bottom:calc(100% + 1px); color:var(--accent); font-size:10px; font-weight:750; text-transform:uppercase; letter-spacing:.06em; }
.lesson-card { width:100%; min-height:126px; margin-bottom:10px; padding:14px; text-align:left; color:var(--text); border:1px solid var(--border); border-left:3px solid var(--accent); border-radius:13px; background:var(--surface); cursor:pointer; }
.lesson-card:hover { transform:translateY(-1px); border-color:color-mix(in srgb,var(--accent) 55%,var(--border)); box-shadow:var(--shadow); }
.lesson-time { color:var(--accent); font-size:12px; font-weight:750; }
.lesson-card h3 { margin:4px 0 7px; }
.lesson-detail { margin:2px 0; color:var(--muted); font-size:12px; }
.study-layout { display:grid; grid-template-columns:minmax(300px,.8fr) minmax(420px,1.2fr); gap:20px; align-items:start; }
.study-form { display:grid; gap:15px; position:sticky; top:20px; }
.study-access { padding:11px 13px; border-radius:10px; background:var(--surface-2); color:var(--muted); font-size:13px; }
.study-access.ready { background:var(--accent-soft); color:var(--accent); }
.study-purchase { display:flex; flex-wrap:wrap; gap:8px; }
.study-purchase .secondary { flex:1 1 180px; text-align:center; text-decoration:none; }
.future-input { display:grid; grid-template-columns:auto minmax(0,1fr) auto; align-items:center; gap:10px; padding:12px; border:1px dashed var(--border); border-radius:11px; color:var(--muted); }
.future-input div { display:grid; gap:2px; }
.future-input small { font-weight:400; }
.gate-card { max-width:520px; }
.gate-actions { grid-template-columns:1fr auto auto; }
label { display:grid; gap:6px; font-weight:650; }
input,textarea,select { width:100%; border:1px solid var(--border); background:var(--surface-2); color:var(--text); padding:11px 12px; border-radius:10px; outline:none; }
input:focus,textarea:focus,select:focus { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft); }
textarea { min-height:210px; resize:vertical; }
.study-result { box-shadow:none; }
.study-section { padding:19px 0; border-top:1px solid var(--border); }
.study-section:first-child { padding-top:0; border-top:0; }
.feedback-rating { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.feedback-rating h3 { width:100%; margin-bottom:4px; }
.defense { margin:12px -8px -4px; padding:20px; border-radius:14px; background:var(--accent-soft); }
.defense blockquote { margin:0 0 16px; font-size:16px; }
.numbered { padding-left:22px; }
.numbered li { margin:8px 0; }
.deadline-box { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:14px; }
.deadline-box .wide { grid-column:1/-1; }
.empty-state,.coming-page { min-height:420px; display:grid; place-content:center; text-align:center; color:var(--muted); }
.empty-icon { font-size:32px; font-weight:800; color:var(--accent); }
.calendar-head { display:flex; align-items:center; justify-content:center; gap:25px; margin-bottom:14px; }
.calendar-head h2 { min-width:200px; margin:0; text-align:center; }
.calendar-grid { display:grid; grid-template-columns:repeat(7,minmax(100px,1fr)); padding:0; overflow:hidden; box-shadow:none; }
.weekday { padding:11px; background:var(--surface-2); color:var(--muted); text-align:center; font-size:12px; font-weight:750; }
.calendar-day { min-height:118px; padding:10px; border-top:1px solid var(--border); border-right:1px solid var(--border); }
.calendar-day.other { color:var(--muted); opacity:.55; }
.calendar-day.today .day-number { background:var(--accent); color:#fff; }
.day-number { display:grid; place-items:center; width:27px; height:27px; border-radius:9px; font-weight:700; }
.calendar-event { width:100%; margin-top:5px; padding:5px 7px; border:0; border-radius:7px; background:var(--accent-soft); color:var(--accent); text-align:left; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; cursor:pointer; font-size:11px; }
.calendar-event.done { text-decoration:line-through; opacity:.6; }
.calendar-more { display:block; margin-top:3px; color:var(--muted); text-align:center; font-size:9px; font-weight:750; }
.settings-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; align-items:start; }
.settings-column { display:grid; gap:18px; align-content:start; min-width:0; }
.settings-card { box-shadow:none; }
.settings-choice { margin-bottom:0; }
.setting-row { display:flex; align-items:center; justify-content:space-between; gap:18px; padding:13px 0; border-top:1px solid var(--border); }
.setting-row select { width:120px; }
.setting-row span,.setting-action span:first-child { display:grid; }
.setting-row small,.setting-action small { color:var(--muted); font-weight:400; }
.settings-fields { display:grid; gap:5px; }
.settings-fields label,.field-options label { display:flex; align-items:center; justify-content:space-between; gap:12px; width:100%; }
.settings-field { padding:7px 0; border-top:1px solid var(--border); }
.status-panel { display:flex; align-items:flex-start; gap:12px; padding:15px; border-radius:12px; background:var(--surface-2); }
.status-panel p { margin:3px 0 0; color:var(--muted); }
.setting-action { width:100%; display:flex; align-items:center; justify-content:space-between; gap:15px; padding:14px 0; border:0; border-top:1px solid var(--border); background:transparent; color:var(--text); text-align:left; cursor:pointer; }
.setting-action[href] { text-decoration:none; }
.setting-action.disabled { cursor:default; color:var(--muted); }
.mobile-drawer { position:fixed; z-index:40; top:0; bottom:0; left:0; width:min(310px,86vw); padding:22px 16px; background:var(--surface); box-shadow:20px 0 50px rgba(0,0,0,.22); transform:translateX(-105%); transition:transform .2s ease; }
.mobile-drawer.open { transform:translateX(0); }
.drawer-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:24px; }
.drawer-backdrop { position:fixed; z-index:35; inset:0; width:100%; height:100%; border:0; background:rgba(0,0,0,.45); }
.modal { width:min(720px,calc(100vw - 28px)); max-height:calc(100vh - 28px); padding:0; border:0; border-radius:18px; background:transparent; color:var(--text); overflow:hidden; }
.modal::backdrop { background:rgba(0,0,0,.5); backdrop-filter:blur(3px); }
.modal-card { max-height:calc(100vh - 28px); padding:24px; border:1px solid var(--border); border-radius:18px; background:var(--surface); overflow:auto; }
.modal-head { display:flex; justify-content:space-between; align-items:flex-start; gap:16px; margin-bottom:18px; }
.modal-head h2 { margin-bottom:0; }
.form-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:13px; }
.form-grid .wide { grid-column:1/-1; }
.form-grid textarea { min-height:88px; }
.deadline-status { min-height:44px; padding:8px 0; display:flex; flex-direction:row; align-items:center; justify-content:space-between; }
.deadline-status input { width:18px; height:18px; margin:0; flex:0 0 auto; accent-color:var(--accent); }
.form-error { min-height:22px; margin:9px 0 0; color:var(--danger); font-size:13px; }
.modal-actions { display:grid; grid-template-columns:auto 1fr auto auto; align-items:center; gap:9px; margin-top:12px; }
.upload-box { padding:20px; border:1px dashed color-mix(in srgb,var(--accent) 55%,var(--border)); border-radius:14px; background:var(--accent-soft); }
.upload-box p { margin:7px 0 14px; color:var(--muted); font-size:13px; }
.import-modal { width:min(1040px,calc(100vw - 28px)); }
.import-rows { display:grid; gap:10px; max-height:48vh; margin:14px 0; overflow:auto; }
.preview-controls { display:flex; align-items:center; gap:10px; }
.preview-toggle { min-width:210px; min-height:40px; padding:8px 10px; display:flex; flex-direction:row; align-items:center; justify-content:space-between; gap:12px; border:1px solid var(--border); border-radius:10px; background:var(--surface-2); cursor:pointer; }
.preview-toggle input { width:18px; height:18px; margin:0; flex:0 0 auto; accent-color:var(--accent); }
.filter-note { margin:4px 0 0; color:var(--accent); font-size:12px; }
.import-row { display:grid; grid-template-columns:100px minmax(180px,1.5fr) 88px 88px minmax(120px,1fr) minmax(100px,.8fr) 42px; gap:8px; align-items:end; padding:12px; border:1px solid var(--border); border-radius:12px; background:var(--surface-2); }
.import-row label { font-size:11px; color:var(--muted); }
.import-row input,.import-row select { padding:8px; font-size:13px; }
.import-row .teacher-field { grid-column:1/3; }
.import-row .type-field { grid-column:3/5; }
.row-remove { width:38px; height:38px; border:1px solid var(--border); border-radius:9px; background:var(--surface); color:var(--danger); cursor:pointer; }
#toast { position:fixed; z-index:80; right:24px; bottom:24px; transform:translateY(20px); opacity:0; pointer-events:none; max-width:min(420px,calc(100vw - 32px)); padding:12px 16px; border-radius:10px; background:var(--text); color:var(--surface); transition:.2s; }
#toast.show { opacity:1; transform:translateY(0); }

@media (max-width:900px) {
  .shell,.shell.sidebar-collapsed { grid-template-columns:1fr; }
  .sidebar { display:none; }
  .bottom-nav { position:fixed; z-index:25; bottom:0; left:0; width:100%; height:78px; padding:7px 8px 9px; border-top:1px solid var(--border); background:var(--surface); box-shadow:0 -8px 24px rgba(20,20,40,.08); display:grid; grid-template-columns:repeat(4,1fr); gap:7px; }
  .bottom-nav .nav-item { min-height:60px; justify-content:center; flex-direction:column; gap:4px; padding:6px 4px; font-size:12px; font-weight:650; text-align:center; }
  .bottom-nav .nav-item.active { box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 25%,transparent); }
  .bottom-nav .nav-icon { width:28px; height:25px; flex-basis:25px; font-size:25px; font-weight:700; }
  .bottom-nav .ai-icon { font-size:11px; }
  .mobile-drawer { display:block; }
  .drawer-backdrop:not([hidden]) { display:block; }
  main { padding:0 16px 104px; }
  .topbar { min-height:92px; grid-template-columns:42px minmax(0,1fr) 42px; gap:6px; }
  .menu-button { display:block; margin-left:-8px; }
  .two-columns,.study-layout,.settings-grid { grid-template-columns:1fr; }
  .settings-column { display:contents; }
  #appearanceSettings { grid-row:1; }
  #scheduleSettings { grid-row:2; }
  #aiSettings { grid-row:3; }
  #dataSettings { grid-row:4; }
  .study-form { position:static; }
  .schedule-actions { align-items:flex-start; }
  .action-group { flex-wrap:wrap; justify-content:flex-end; }
  .schedule-grid { display:block; padding-top:0; overflow:visible; }
  .day-column { width:100%; margin-bottom:22px; }
  .day-heading { position:sticky; top:0; z-index:2; margin:0 0 9px; padding:8px 4px; background:var(--bg); }
  .day-heading:has(.today-marker) { height:48px; }
  .today-marker { position:static; display:block; height:16px; }
  .lesson-card { min-height:0; margin-bottom:9px; padding:16px; }
  .calendar-grid { width:100%; grid-template-columns:repeat(7,minmax(0,1fr)); overflow:hidden; }
  .weekday { min-width:0; padding:8px 2px; }
  .calendar-day { min-width:0; min-height:84px; padding:5px 4px; overflow:hidden; }
  .day-number { width:25px; height:25px; font-size:12px; }
  .calendar-event { padding:4px; font-size:9px; }
  .import-row { grid-template-columns:1fr 1fr; }
  .import-row .subject-field,.import-row .location-field,.import-row .room-field,.import-row .teacher-field,.import-row .type-field { grid-column:1/-1; }
  .row-remove { justify-self:end; }
}

@media (max-width:560px) {
  .hero { align-items:flex-start; flex-direction:column; }
  .schedule-actions { display:grid; }
  .action-group { justify-content:stretch; display:grid; grid-template-columns:1fr 1fr 1fr; }
  .field-settings summary,.secondary,.primary { text-align:center; }
  .field-settings .popover { left:0; right:auto; }
  .deadline-box,.form-grid { grid-template-columns:1fr; }
  .deadline-box .wide,.form-grid .wide { grid-column:auto; }
  .calendar-head { gap:12px; }
  .calendar-head h2 { min-width:170px; font-size:18px; }
  .calendar-day { min-height:88px; padding:4px 2px; }
  .calendar-event { min-height:20px; margin-top:3px; padding:3px 4px; border-radius:5px; font-size:8px; font-weight:700; line-height:1.15; }
  .modal-card { padding:18px; }
  .preview-head { align-items:stretch; flex-direction:column; }
  .preview-controls { align-items:stretch; flex-direction:column; }
  .preview-toggle { width:100%; }
  .modal-actions { grid-template-columns:1fr 1fr; }
  .modal-actions span { display:none; }
  .import-row { grid-template-columns:1fr; }
  .import-row .subject-field,.import-row .location-field,.import-row .room-field,.import-row .teacher-field,.import-row .type-field { grid-column:auto; }
  #toast { right:16px; bottom:94px; }
}
.account-actions { display:flex; flex-wrap:wrap; gap:10px; margin-top:16px; }
.account-actions > * { max-width:100%; white-space:normal; text-align:center; }
#accountNotice { overflow-wrap:anywhere; }
.photo-input { border-top:1px solid var(--border); padding-top:18px; margin-top:18px; }
.photo-task { display:grid; grid-template-columns:20px minmax(0,1fr); gap:10px; align-items:start; margin:12px 0; }
.photo-task input { width:18px; height:18px; margin:3px 0; }
.photo-task span { overflow-wrap:anywhere; max-height:160px; overflow:auto; }