:root {
  --ink: #15213a;
  --muted: #738099;
  --line: #dde3ee;
  --canvas: #f5f7fb;
  --surface: #fff;
  --side: #131f37;
  --side-soft: #203154;
  --blue: #287df0;
  --blue-deep: #1467d3;
  --mint: #35b77c;
  --danger: #c94055;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
}

:root[data-theme="dark"] {
  --ink: #e9eefb;
  --muted: #a5b1c9;
  --line: #2b3a57;
  --canvas: #0e1729;
  --surface: #16233b;
  --side: #091224;
  --side-soft: #172744;
}

* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: var(--canvas); }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { border: 0; cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #83b6ff; outline-offset: 3px; }

.peak-login { display: grid; min-height: 100vh; place-items: center; padding: 1.25rem; background: radial-gradient(circle at 80% 10%, #287df024, transparent 25rem), var(--canvas); }
.login-card { width: min(31rem, 100%); padding: clamp(1.5rem, 7vw, 3rem); border: 1px solid var(--line); border-radius: 1.5rem; background: var(--surface); box-shadow: 0 2rem 5rem #09152e18; }
.brand-lockup { display: flex; align-items: center; gap: .75rem; color: var(--ink); font-weight: 800; letter-spacing: -.04em; }
.brand-orbit, .avatar-fallback { display: grid; width: 2.5rem; height: 2.5rem; place-items: center; border-radius: 50%; color: white; background: conic-gradient(from 220deg, #78b5ff, #287df0, #172b75, #78b5ff); box-shadow: inset 0 0 0 5px #ffffff33; font-weight: 800; }
.comment-avatar { width: 2.5rem; height: 2.5rem; border-radius: 50%; object-fit: cover; background: var(--surface-muted); }
.brand-lockup strong { font-size: 1.25rem; }
.login-card h1 { margin: 3rem 0 .7rem; font-size: clamp(2rem, 8vw, 3rem); letter-spacing: -.06em; } .login-card > .primary { justify-self: center; text-align: center; }
.login-card p, .muted { color: var(--muted); line-height: 1.55; }
.primary, .secondary, .ghost { min-height: 2.75rem; border-radius: .8rem; padding: .7rem 1rem; font-weight: 700; }
.primary { color: white; background: var(--blue); box-shadow: 0 .6rem 1.2rem #287df040; }
.primary:hover { background: var(--blue-deep); }
.secondary { color: var(--blue); background: #287df017; }
.ghost { color: var(--muted); background: transparent; }
.login-actions { display: grid; gap: .75rem; margin-top: 1.8rem; }
.login-actions .primary { width: 100%; }
.qr { display: block; width: min(15rem, 100%); margin: 1.5rem auto; border-radius: 1rem; background: #fff; }
.code { margin: 1rem 0; color: var(--blue); font-family: ui-monospace, monospace; font-size: 2rem; font-weight: 800; letter-spacing: .13em; text-align: center; }

.shell { display: grid; grid-template-columns: 17.5rem minmax(0, 1fr); min-height: 100vh; }
.sidebar { position: sticky; top: 0; display: flex; height: 100vh; flex-direction: column; padding: 1.2rem .9rem; color: #dce6fc; background: var(--side); }
.sidebar .brand-lockup { padding: .65rem .75rem 2rem; color: white; }
.nav { display: grid; gap: .25rem; }
.nav button { display: flex; align-items: center; gap: .75rem; width: 100%; border-radius: .75rem; padding: .8rem .75rem; color: #b8c6e2; background: transparent; font-weight: 650; text-align: left; }
.nav button:hover, .nav button[aria-current="page"] { color: #fff; background: var(--side-soft); }
.nav .nav-mark { display: inline-grid; width: 1.4rem; place-items: center; color: #7faeff; }
.nav-support { display: flex; align-items: center; gap: .75rem; width: 100%; min-height: 2.5rem; border-radius: .55rem; padding: .7rem .75rem; color: #aaa9a3; background: transparent; font-weight: 650; text-decoration: none; } .nav-support .nav-mark { display: inline-grid; width: 1.4rem; place-items: center; color: #8eaef3; } .nav-support:hover { color: #fff; background: var(--side-soft); }
.support-fab { position: fixed; z-index: 5; right: 1.5rem; bottom: 1.5rem; display: grid; width: 3rem; height: 3rem; place-items: center; border-radius: 50%; color: white; background: var(--blue); box-shadow: 0 .6rem 1.5rem #0003; font-size: 1.3rem; text-decoration: none; }
.sidebar-footer { margin-top: auto; padding: 1rem .75rem .25rem; color: #91a0bc; font-size: .8rem; }
.app-area { min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; min-height: 4.5rem; padding: .9rem clamp(1rem, 4vw, 3.5rem); border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 89%, transparent); }
.mobile-menu { display: none; color: var(--ink); background: transparent; font-size: 1.3rem; }
.crumb { color: var(--muted); font-size: .9rem; }
.theme-switch { display: inline-flex; align-items: center; gap: .55rem; min-height: 2.5rem; border: 1px solid var(--line); border-radius: 999px; padding: .28rem .42rem .28rem .7rem; color: var(--ink); background: var(--surface); font-size: .82rem; font-weight: 750; box-shadow: 0 1px 2px #0000000d; }
.theme-switch:hover { border-color: var(--blue); }
.switch { position: relative; display: block; width: 2.45rem; height: 1.38rem; border-radius: 999px; background: #b8bcc2; transition: background .2s ease; }
.switch::after { position: absolute; top: .17rem; left: .17rem; width: 1.04rem; height: 1.04rem; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px #0004; content: ""; transition: transform .2s ease; }
.theme-switch[aria-checked="true"] .switch { background: var(--blue); }
.theme-switch[aria-checked="true"] .switch::after { transform: translateX(1.07rem); }
.page { width: min(76rem, 100%); margin: 0 auto; padding: clamp(1.5rem, 5vw, 4.5rem) clamp(1rem, 4vw, 3.5rem) 4rem; }
.eyebrow { margin: 0 0 .6rem; color: var(--blue); font-size: .76rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.page h1 { max-width: 48rem; margin: 0; font-size: clamp(2rem, 5vw, 3.8rem); letter-spacing: -.065em; line-height: .98; }
.page-lede { max-width: 40rem; margin: 1rem 0 2.5rem; color: var(--muted); line-height: 1.6; }

.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1rem; }
.course-card { position: relative; display: flex; min-height: 18rem; flex-direction: column; justify-content: flex-end; overflow: hidden; border: 1px solid var(--line); border-radius: 1.25rem; padding: 1.5rem; color: white; background: linear-gradient(145deg, #10243e, #294b82); text-align: left; transition: transform .2s ease, box-shadow .2s ease; }
.course-card::before { position: absolute; inset: 0; background: radial-gradient(circle at 80% 20%, #7eafff77, transparent 17rem), linear-gradient(120deg, transparent 45%, #0a1428a8); content: ""; }
.course-card > * { position: relative; }
.course-card:hover { transform: translateY(-.25rem); box-shadow: 0 1.2rem 2rem #12264b2b; }
.course-card.locked { color: var(--ink); background: var(--surface); }
.course-card.locked::before { background: linear-gradient(130deg, transparent, #e4ecfa88); }
.course-meta { color: inherit; opacity: .78; font-size: .85rem; }
.course-card h2 { margin: .6rem 0; font-size: 1.55rem; letter-spacing: -.04em; }
.course-card p { margin: 0; opacity: .82; line-height: 1.45; }
.card-action { margin-top: 1.25rem; font-weight: 800; }
.progress-track { height: .32rem; margin-top: 1.25rem; overflow: hidden; border-radius: 1rem; background: #ffffff42; }
.progress-track i { display: block; height: 100%; border-radius: inherit; background: #81e3bd; }

.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.module-card { min-height: 15rem; border: 1px solid var(--line); border-radius: 1.25rem; padding: 1.5rem; background: var(--surface); color: var(--ink); text-align: left; }
.module-card:hover { border-color: #287df055; box-shadow: 0 .7rem 1.7rem #0d204111; }
.module-card.complete { border-color: #35b77c77; }
.module-count { color: var(--blue); font-size: .85rem; font-weight: 800; }
.module-card h2 { margin: .75rem 0; font-size: 1.55rem; letter-spacing: -.045em; line-height: 1.05; }
.module-card p { color: var(--muted); line-height: 1.45; }
.lesson-list { display: grid; gap: .7rem; }
.lesson-row { display: flex; align-items: center; gap: .85rem; width: 100%; border: 1px solid var(--line); border-radius: .9rem; padding: 1rem 1.1rem; color: var(--ink); background: var(--surface); text-align: left; }
.lesson-row:hover { border-color: #287df088; }
.admin-module { margin-left: 1.5rem; width: calc(100% - 1.5rem); }
.admin-lesson { margin-left: 3rem; width: calc(100% - 3rem); }
.orderable { cursor: grab; }
.orderable.dragging { opacity: .45; }
.order-controls { display: inline-flex; gap: .15rem; margin-left: auto; }
.order-button { width: 2rem; height: 2rem; border: 1px solid var(--line); border-radius: .5rem; color: var(--muted); background: var(--canvas); font-weight: 800; }
.order-button:disabled { cursor: not-allowed; opacity: .45; }
.lesson-check { display: grid; flex: none; width: 1.45rem; height: 1.45rem; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: white; font-size: .8rem; }
.lesson-check.done { border-color: var(--mint); background: var(--mint); }

.lesson-layout { width: min(48rem, 100%); }
.assignment { border-radius: 1.1rem; padding: clamp(1.25rem, 3vw, 2rem); }
.discussion { max-width: 48rem; }
.comment-form { border: 0; padding: 0; background: transparent; }
.reply-form { display: grid; grid-template-columns: 1fr auto; gap: .5rem; margin-top: .9rem; padding-top: .9rem; border-top: 1px solid var(--line); }
.reply-form textarea { min-height: 2.6rem; }
.comment-body p:first-child { margin-top: .65rem; }
.comment-body p:last-child { margin-bottom: 0; }
.lesson-layout { width: min(58rem, 100%); }
.back-link { display: inline-flex; margin-bottom: 1.5rem; color: var(--muted); background: transparent; font-weight: 700; }
.video { width: 100%; margin: 1.8rem 0; border-radius: 1.2rem; background: #030814; aspect-ratio: 16 / 9; }
.rich-copy { margin: 2rem 0; font-size: 1.05rem; line-height: 1.75; }
.rich-copy p { margin: 0 0 1rem; }
.lesson-complete { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 1.5rem 0 3rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 1rem 0; color: var(--muted); }
.assignment { margin: 3rem 0; border: 1px solid var(--line); border-radius: 1rem; padding: 1.25rem; background: var(--surface); }
.assignment h2 { margin-top: 0; letter-spacing: -.04em; }
.assignment-copy, .mentor-note { white-space: pre-wrap; line-height: 1.6; }
.mentor-note { color: var(--mint); font-weight: 650; }
.discussion { margin-top: 3rem; }
.discussion h2 { letter-spacing: -.04em; }
.comment-form, .profile-form { display: grid; gap: .75rem; border: 1px solid var(--line); border-radius: 1rem; padding: 1rem; background: var(--surface); }
textarea, input { width: 100%; border: 1px solid var(--line); border-radius: .7rem; padding: .75rem; color: var(--ink); background: var(--canvas); }
textarea { min-height: 5rem; resize: vertical; }
.comments { display: grid; gap: 1rem; margin-top: 1rem; }
.comment { border-top: 1px solid var(--line); padding: 1rem 0; }
.comment.reply { margin-left: 2rem; }
.comment-head { display: flex; align-items: center; gap: .6rem; }
.comment-head strong { font-size: .94rem; }
.comment-profile { padding: 0; color: var(--ink); background: transparent; font-size: .94rem; font-weight: 700; }
.public-profile { display: grid; justify-items: start; gap: .8rem; width: min(38rem, 100%); border: 1px solid var(--line); border-radius: 1.25rem; padding: 1.5rem; background: var(--surface); }
.public-profile h1 { font-size: clamp(2rem, 6vw, 3rem); }
.public-avatar { width: 6rem; height: 6rem; border-radius: 50%; object-fit: cover; background: var(--canvas); }
.mentor { display: inline-flex; align-items: center; gap: .25rem; color: var(--mint); font-size: .72rem; font-weight: 800; }
.comment time { margin-left: auto; color: var(--muted); font-size: .78rem; }
.comment p { margin: .7rem 0 0; line-height: 1.55; white-space: pre-wrap; }
.comment-action { margin-top: .7rem; padding: 0; color: var(--muted); background: transparent; font-size: .78rem; text-decoration: underline; }
.notification-setting { display: grid; grid-template-columns: minmax(10rem, 1fr) auto auto auto auto; align-items: center; gap: .5rem; padding: .6rem 0; border-top: 1px solid var(--line); }
.notification-setting input { width: auto; }
.reports-list { display: grid; gap: .7rem; margin-top: 1.25rem; }
.reports-list h2 { margin: 0; }
.submission-review { display: grid; gap: .7rem; border: 1px solid var(--line); border-radius: .9rem; padding: 1rem; background: var(--surface); }
.submission-review p { margin: 0; white-space: pre-wrap; line-height: 1.55; }
.empty { border: 1px dashed var(--line); border-radius: 1rem; padding: 2rem; color: var(--muted); text-align: center; }

.modal-backdrop { background: #17181abf; }
.modal-backdrop { position: fixed; z-index: 10; inset: 0; display: grid; place-items: center; padding: 1rem; background: #17181abf; }
.modal { width: min(27rem, 100%); border-radius: 1.2rem; padding: 1.6rem; color: var(--ink); background: var(--surface); box-shadow: 0 2rem 5rem #0004; }
.modal h2 { margin-top: 0; letter-spacing: -.04em; }
.modal .actions { display: flex; gap: .75rem; margin-top: 1.2rem; }


/* Assignment forms: a quiet paper-like work surface inside the graphite app. */
.assignment-form, .form-builder { display: grid; gap: 1.1rem; border: 1px solid var(--line); border-radius: .9rem; padding: clamp(1rem, 3vw, 1.5rem); background: var(--surface); }
.assignment-question { display: grid; gap: .7rem; min-inline-size: 0; margin: 0; border: 0; border-top: 1px solid var(--line); padding: 1.1rem 0 0; } .assignment-question input, .assignment-question textarea { min-width: 0; }
.assignment-question:first-child { border-top: 0; padding-top: 0; }
.assignment-question legend { padding: 0; color: var(--ink); font-weight: 750; }
.assignment-answer { white-space: pre-wrap; line-height: 1.65; }
.choice-list { display: grid; gap: .5rem; }
.choice-option, .required-toggle { display: inline-flex; align-items: center; gap: .55rem; color: var(--ink) !important; font-size: .9rem !important; font-weight: 600 !important; }
.choice-option input, .required-toggle input { width: auto !important; }
.form-builder { width: min(52rem, 100%); }
.builder-add { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: .85rem 0; }
.builder-add .secondary { min-height: 2.15rem; padding: .4rem .65rem; }
.builder-questions { display: grid; gap: .8rem; }
.builder-question { display: grid; grid-template-columns: auto minmax(0, 1fr) minmax(10rem, .48fr) auto; align-items: start; gap: .8rem; border: 1px solid var(--line); border-radius: .75rem; padding: 1rem; background: var(--canvas); }
.question-number { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; color: var(--blue); background: var(--surface); font-size: .76rem; font-weight: 800; }
.builder-question-tools { display: flex; align-items: center; gap: .5rem; }
.builder-question > label, .builder-question .builder-options { grid-column: 2 / -1; }
.builder-options { min-height: 5rem; } .attachment-upload { display: grid; gap: .45rem; padding: .85rem; border: 1px dashed var(--line); border-radius: .65rem; color: var(--ink); font-weight: 700; } .attachment-upload input { border: 0; padding: 0; background: transparent; } .attachment-list { display: grid; gap: .35rem; margin-top: .8rem; } .attachment-list a { color: var(--blue); font-size: .9rem; }
@media (max-width: 760px) {
  .shell { display: block; }
  .sidebar { position: fixed; z-index: 20; width: min(18rem, 84vw); transform: translateX(-105%); transition: transform .2s ease; box-shadow: 1rem 0 2rem #0003; }
  .sidebar.open { transform: translateX(0); }
  .mobile-menu { display: block; }
  .module-grid { grid-template-columns: 1fr; }
  .topbar { min-height: 4rem; }
  .course-grid { grid-template-columns: 1fr; }
  .page h1 { font-size: clamp(2rem, 12vw, 3rem); }
  .lesson-complete { align-items: flex-start; flex-direction: column; }
  .builder-question { grid-template-columns: auto minmax(0, 1fr); }
  .builder-question select, .builder-question-tools, .builder-question > label, .builder-question .builder-options { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }

/* Calm, graphite visual language. */
:root { --ink: #17191c; --muted: #6d7279; --line: #e1e2e4; --canvas: #f7f7f5; --surface: #fff; --surface-muted: #f0f0ee; --side: #1c1d20; --side-soft: #303237; --mint: #1d9a67; font-family: "Manrope", Inter, ui-sans-serif, system-ui, sans-serif; }
:root[data-theme="dark"] { --ink: #f2f1ed; --muted: #aaa9a3; --line: #343538; --canvas: #17181a; --surface: #222326; --surface-muted: #2b2c2f; --side: #101113; --side-soft: #292a2d; }
.peak-login { background: var(--canvas); } .login-card { border-radius: 1rem; box-shadow: 0 1.5rem 4rem #00000010; }
.brand-orbit, .avatar-fallback { background: var(--blue); box-shadow: inset 0 0 0 4px #ffffff30; }
.primary, .secondary, .ghost { min-height: 2.5rem; border-radius: .55rem; padding: .6rem .9rem; font-weight: 750; } .primary { box-shadow: none; }
.shell { grid-template-columns: 16.25rem minmax(0, 1fr); } .sidebar { color: #deded9; } .nav button { border-radius: .55rem; padding: .7rem .75rem; color: #aaa9a3; } .nav .nav-mark { color: #8eaef3; }
.topbar { min-height: 4.25rem; background: var(--canvas); } .page { padding-top: clamp(1.5rem, 5vw, 4rem); } .page h1 { font-size: clamp(2rem, 5vw, 3.45rem); line-height: 1.02; }
.lesson-row { border-radius: .75rem; padding: .85rem 1rem; } .comment-form, .profile-form { border-radius: .8rem; }
textarea, input, select { width: 100%; border: 1px solid var(--line); border-radius: .55rem; padding: .7rem .75rem; color: var(--ink); background: var(--canvas); }
.comments { gap: .9rem; } .comment-thread { display: grid; gap: .65rem; } .reply-branch { display: grid; gap: .65rem; margin-left: clamp(1rem, 5vw, 2.5rem); padding-left: 1rem; border-left: 2px solid var(--blue); } .comment { border: 1px solid var(--line); border-radius: .8rem; padding: 1rem; background: var(--surface); } .comment.reply { margin: 0; border-left: 0; background: var(--surface-muted); }
.comment-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem .75rem; margin-top: .85rem; } .comment-action { min-height: auto; margin: 0; padding: 0; color: var(--muted); background: transparent; font-size: .8rem; font-weight: 650; } .comment-action:hover { color: var(--blue); }
.comment-menu { position: relative; margin-left: auto; } .icon-button { display: grid; width: 2rem; min-height: 2rem; place-items: center; border-radius: .45rem; padding: 0; color: var(--muted); background: transparent; font-size: 1.2rem; line-height: 1; } .icon-button:hover { color: var(--ink); background: var(--surface-muted); }
.action-menu[hidden] { display: none !important; }
.action-menu { position: absolute; z-index: 3; right: 0; top: calc(100% + .35rem); display: grid; min-width: 12rem; padding: .35rem; border: 1px solid var(--line); border-radius: .65rem; background: var(--surface); box-shadow: 0 .75rem 2rem #00000018; }
.action-menu button { padding: .6rem .7rem; border-radius: .4rem; color: var(--ink); background: transparent; font-size: .85rem; text-align: left; } .action-menu button:hover { background: var(--surface-muted); } .action-menu .danger { color: var(--danger); } .danger-button { min-height: 2.5rem; border-radius: .55rem; padding: .6rem .9rem; color: white; background: var(--danger); font-weight: 750; }
.form-actions { display: flex; flex-wrap: wrap; gap: .65rem; align-items: center; } .toast-region { position: fixed; z-index: 40; right: 1.25rem; bottom: 1.25rem; display: grid; gap: .55rem; width: min(23rem, calc(100vw - 2.5rem)); } .toast { border: 1px solid var(--line); border-left: 3px solid var(--mint); border-radius: .65rem; padding: .85rem 1rem; color: var(--ink); background: var(--surface); box-shadow: 0 .8rem 2rem #00000020; font-weight: 700; } .toast.error { border-left-color: var(--danger); } .status-chip { display: inline-flex; width: fit-content; align-items: center; border-radius: 999px; padding: .28rem .55rem; background: var(--surface-muted); color: var(--muted); font-size: .77rem; font-weight: 750; }
.status-chip.accepted { color: #0e7247; background: #dff3e8; } .status-chip.review { color: #8a5b00; background: #fff1d4; } .status-chip.revision { color: #a03b47; background: #fae4e6; }
.profile-layout { display: grid; grid-template-columns: minmax(0, 42rem) 1fr; gap: 1.25rem; align-items: start; } .profile-form input[type="checkbox"] { width: auto; justify-self: start; } .profile-form label { color: var(--muted); font-size: .85rem; font-weight: 750; } .profile-avatar-preview { display: grid; width: 5rem; height: 5rem; place-items: center; border-radius: 50%; color: white; background: var(--blue); font-size: 1.8rem; font-weight: 800; }
.report-card { display: grid; gap: .65rem; align-items: start; } .report-target { border: 0; width: 100%; text-align: left; cursor: pointer; }
.report-target { border-left: 3px solid var(--blue); padding: .65rem .8rem; background: var(--surface-muted); white-space: pre-wrap; line-height: 1.45; } .admin-toolbar { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-left: auto; }

.public-profile { width: min(52rem, 100%); grid-template-columns: auto 1fr; gap: 1.1rem 1.4rem; padding: clamp(1.25rem, 4vw, 2rem); } .public-profile h1 { align-self: end; max-width: 100%; font-size: clamp(1.45rem, 3.5vw, 2.25rem); overflow-wrap: anywhere; } .public-profile p { grid-column: 1 / -1; } .public-profile .secondary { grid-column: 1 / -1; justify-self: start; }


/* Authoring controls use the same quiet, deliberate system as the rest of Peak Club. */
input[type="checkbox"] {
  appearance: none;
  width: 1.18rem !important;
  height: 1.18rem;
  flex: 0 0 1.18rem;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: .33rem;
  padding: 0;
  background: var(--canvas);
  background-position: center;
  background-repeat: no-repeat;
  background-size: .72rem;
  cursor: pointer;
  transition: border-color .16s ease, background-color .16s ease;
}
input[type="checkbox"]:hover { border-color: var(--blue); }
input[type="checkbox"]:checked {
  border-color: var(--blue);
  background-color: var(--blue);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m3 8 3 3 7-7' fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2.3'/%3E%3C/svg%3E");
}
select {
  appearance: none;
  padding-right: 2.55rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%236d7279' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.7'/%3E%3C/svg%3E");
  background-position: right .78rem center;
  background-repeat: no-repeat;
  background-size: 1rem;
}
input[type="checkbox"]:focus-visible, select:focus-visible { outline: 3px solid #83b6ff; outline-offset: 2px; }
.field-label { color: var(--ink); font-size: .88rem; font-weight: 750; }
.tariff-list { display: grid; gap: .5rem; padding: .25rem 0; }
.tariff-option { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .7rem; min-height: 3rem; border: 1px solid var(--line); border-radius: .65rem; padding: .65rem .75rem; color: var(--ink); background: var(--canvas); cursor: pointer; }
.tariff-option:has(input:checked) { border-color: var(--blue); background: color-mix(in srgb, var(--blue) 8%, var(--canvas)); }
.tariff-option small { color: var(--muted); font-size: .74rem; }
.form-error { min-height: 1.2rem; margin: 0; color: var(--danger); font-size: .88rem; line-height: 1.4; }
.management-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; border-bottom: 1px solid var(--line); padding-bottom: 1.25rem; }
.management-toolbar p { margin: 0; }
.course-admin-list, .module-admin-tree, .lesson-admin-tree { display: grid; gap: .75rem; }
.course-admin-card, .module-admin-card { border: 1px solid var(--line); border-radius: .85rem; padding: 1rem; background: var(--surface); }
.course-admin-card { display: grid; gap: 1rem; }
.module-admin-tree { border-top: 1px solid var(--line); padding-top: .9rem; }
.module-admin-card { display: grid; gap: .8rem; margin-left: 1rem; background: var(--surface-muted); }
.course-admin-summary, .module-admin-summary { display: grid; gap: .22rem; min-width: 0; }
.course-admin-summary strong { font-size: 1.05rem; }
.course-admin-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .35rem; }
.lesson-admin-tree { padding-left: 1rem; border-left: 2px solid var(--line); }
.lesson-admin-tree .admin-lesson { width: 100%; margin-left: 0; background: var(--surface); }
.course-builder { width: min(44rem, 100%); }
@media (max-width: 620px) {
  .management-toolbar { align-items: flex-start; flex-direction: column; }
  .module-admin-card { margin-left: 0; }
  .course-admin-actions { align-items: stretch; }
  .course-admin-actions .primary, .course-admin-actions .secondary { flex: 1 1 auto; }
}