/* Excelerate LMS — design system.
   One stylesheet for learner, client and admin surfaces. Phone-first; light + dark. */

@font-face { font-family: "Montserrat"; font-style: normal; font-weight: 400 800; font-display: swap; src: url("/fonts/montserrat-normal-latin.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Montserrat"; font-style: normal; font-weight: 400 800; font-display: swap; src: url("/fonts/montserrat-normal-latin-ext.woff2") format("woff2"); unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }

:root {
  --brand: #b800b8;
  --brand-strong: #8f008f;
  --brand-bright: #ff47ff;
  --brand-soft: #fbe6fb;
  --brand-ink: #3d003d;
  --grad: linear-gradient(120deg, #b800b8 0%, #e2007a 55%, #ff6a3d 100%);
  --grad-deep: radial-gradient(1200px 500px at 10% -10%, rgba(255, 71, 255, .35), transparent 60%), radial-gradient(900px 500px at 100% 0%, rgba(255, 106, 61, .25), transparent 60%), linear-gradient(160deg, #1c0a1f 0%, #140716 60%, #0e0510 100%);

  --bg: #f7f6f9;
  --bg-elev: #ffffff;
  --bg-sunken: #efedf3;
  --bg-hover: #f3f0f6;
  --ink: #1c1a1c;
  --ink-2: #4a4550;
  --ink-3: #77717e;
  --line: #e6e2ea;
  --line-strong: #d4ced9;
  --ok: #0f9d6b;
  --ok-soft: #e3f6ee;
  --warn: #c77700;
  --warn-soft: #fff3df;
  --bad: #d12c4c;
  --bad-soft: #fde8ec;
  --info: #2f6fde;
  --info-soft: #e7effd;

  --radius-s: 8px;
  --radius: 14px;
  --radius-l: 22px;
  --shadow-s: 0 1px 2px rgba(28, 10, 31, .06), 0 1px 1px rgba(28, 10, 31, .04);
  --shadow: 0 1px 2px rgba(28, 10, 31, .05), 0 8px 24px -8px rgba(28, 10, 31, .12);
  --shadow-l: 0 2px 6px rgba(28, 10, 31, .06), 0 24px 60px -16px rgba(28, 10, 31, .25);
  --ring: 0 0 0 3px rgba(184, 0, 184, .28);

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-display: "Montserrat", var(--font);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --topbar-h: 64px;
  --sidebar-w: 264px;
  --outline-w: 320px;
  --content-max: 1180px;
  --read-max: 760px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0c12; --bg-elev: #19151d; --bg-sunken: #130f16; --bg-hover: #221d27;
    --ink: #f4f1f6; --ink-2: #c9c2cf; --ink-3: #958c9c; --line: #2a2430; --line-strong: #3a3341;
    --brand-soft: #2c0f2d; --brand-ink: #ffb8ff;
    --ok-soft: #0e2a20; --warn-soft: #2e2210; --bad-soft: #2f1219; --info-soft: #111f38;
    --shadow-s: 0 1px 2px rgba(0, 0, 0, .4); --shadow: 0 8px 24px -8px rgba(0, 0, 0, .6); --shadow-l: 0 24px 60px -16px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f0c12; --bg-elev: #19151d; --bg-sunken: #130f16; --bg-hover: #221d27;
  --ink: #f4f1f6; --ink-2: #c9c2cf; --ink-3: #958c9c; --line: #2a2430; --line-strong: #3a3341;
  --brand-soft: #2c0f2d; --brand-ink: #ffb8ff;
  --ok-soft: #0e2a20; --warn-soft: #2e2210; --bad-soft: #2f1219; --info-soft: #111f38;
  --shadow-s: 0 1px 2px rgba(0, 0, 0, .4); --shadow: 0 8px 24px -8px rgba(0, 0, 0, .6); --shadow-l: 0 24px 60px -16px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

/* ───────── base ───────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; min-height: 100dvh; }
img, video, svg, iframe { max-width: 100%; }
img { height: auto; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; letter-spacing: -.01em; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem); font-weight: 800; letter-spacing: -.02em; }
h2 { font-size: clamp(1.25rem, 1.1rem + .6vw, 1.6rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 1.5rem 0; }
:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 6px; }
::selection { background: rgba(184, 0, 184, .2); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }
.muted { color: var(--ink-3); }
.small { font-size: .875rem; }
.tiny { font-size: .78rem; }
.mono { font-family: var(--font-mono); font-size: .9em; }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.center { text-align: center; }
.grow { flex: 1 1 auto; min-width: 0; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.stack > * + * { margin-top: var(--gap, 1rem); }
.row { display: flex; align-items: center; gap: var(--gap, .75rem); flex-wrap: wrap; }
.row.nowrap { flex-wrap: nowrap; }
.between { justify-content: space-between; }
.grid { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(auto-fill, minmax(var(--min, 260px), 1fr)); }
.cols-2 { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .cols-2 { grid-template-columns: 1fr 1fr; } .cols-main-side { display: grid; gap: 1.5rem; grid-template-columns: minmax(0, 1fr) 340px; align-items: start; } }
.hide-mobile { display: none !important; }
@media (min-width: 900px) { .hide-mobile { display: revert !important; } .hide-desktop { display: none !important; } }

/* ───────── buttons ───────── */
.btn { --bh: 42px; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: var(--bh); padding: 0 1.1rem; border-radius: 999px; border: 1px solid transparent; font: 600 .95rem/1 var(--font); cursor: pointer; white-space: nowrap; transition: transform .12s ease, background .15s ease, box-shadow .15s ease, border-color .15s ease; text-decoration: none !important; user-select: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px -8px rgba(184, 0, 184, .7); }
.btn-primary:hover { background: var(--brand-strong); }
.btn-grad { background: var(--grad); color: #fff; box-shadow: 0 10px 24px -10px rgba(226, 0, 122, .75); }
.btn-grad:hover { filter: saturate(1.15) brightness(1.04); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--bg-hover); }
.btn-soft { background: var(--brand-soft); color: var(--brand-ink); }
.btn-soft:hover { filter: brightness(.97); }
.btn-danger { background: var(--bad); color: #fff; }
.btn-link { background: none; border: 0; color: var(--brand); padding: 0; min-height: auto; border-radius: 4px; }
.btn-sm { --bh: 34px; padding: 0 .85rem; font-size: .85rem; }
.btn-lg { --bh: 52px; padding: 0 1.5rem; font-size: 1.02rem; }
.btn-icon { width: var(--bh); padding: 0; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.btn .spin { width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ───────── forms ───────── */
.field { display: grid; gap: .35rem; }
.field + .field { margin-top: 1rem; }
label, .label { font-weight: 600; font-size: .9rem; color: var(--ink-2); }
.hint { font-size: .82rem; color: var(--ink-3); }
.input, input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], input[type=tel], input[type=url], input[type=date], input[type=time], input[type=datetime-local], select, textarea {
  width: 100%; min-height: 46px; padding: .65rem .9rem; border: 1px solid var(--line-strong); background: var(--bg-elev); color: var(--ink); border-radius: 12px; font: 400 1rem/1.4 var(--font); transition: border-color .15s, box-shadow .15s; }
textarea { min-height: 120px; resize: vertical; line-height: 1.55; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2377717e' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .9rem center; padding-right: 2.4rem; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); box-shadow: var(--ring); }
.input-error { border-color: var(--bad) !important; }
.check { display: flex; gap: .6rem; align-items: flex-start; font-weight: 500; color: var(--ink); cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--brand); flex: none; }
.input-group { position: relative; }
.input-group .btn { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); }
.search { position: relative; }
.search input { padding-left: 2.6rem; border-radius: 999px; }
.search svg { position: absolute; left: .95rem; top: 50%; transform: translateY(-50%); color: var(--ink-3); pointer-events: none; }

/* ───────── surfaces ───────── */
.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-s); }
.card-pad { padding: clamp(1rem, .8rem + .8vw, 1.5rem); }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--line); }
.card-h h2, .card-h h3 { margin: 0; font-size: 1.02rem; }
.card-b { padding: 1.25rem; }
.card-f { padding: .9rem 1.25rem; border-top: 1px solid var(--line); background: var(--bg-sunken); border-radius: 0 0 var(--radius) var(--radius); }
.card-link { display: block; color: inherit; transition: transform .18s ease, box-shadow .18s ease, border-color .18s; }
.card-link:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.panel { background: var(--bg-sunken); border-radius: var(--radius); padding: 1rem 1.25rem; }

.badge { display: inline-flex; align-items: center; gap: .35rem; padding: .2rem .6rem; border-radius: 999px; font: 600 .75rem/1.4 var(--font); background: var(--bg-sunken); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.badge-brand { background: var(--brand-soft); color: var(--brand-ink); border-color: transparent; }
.badge-ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge-warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge-bad { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.badge-info { background: var(--info-soft); color: var(--info); border-color: transparent; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; display: inline-block; }

.alert { display: flex; gap: .75rem; padding: .85rem 1rem; border-radius: 12px; background: var(--info-soft); color: var(--ink); border: 1px solid transparent; }
.alert-ok { background: var(--ok-soft); }
.alert-warn { background: var(--warn-soft); }
.alert-bad { background: var(--bad-soft); }
.alert svg { flex: none; margin-top: 2px; }

.avatar { --s: 36px; width: var(--s); height: var(--s); border-radius: 50%; display: inline-grid; place-items: center; font: 700 calc(var(--s) * .38)/1 var(--font-display); color: #fff; background: var(--grad); flex: none; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }

/* progress */
.bar { height: 8px; border-radius: 999px; background: var(--bg-sunken); overflow: hidden; }
.bar > i { display: block; height: 100%; width: var(--p, 0%); background: var(--grad); border-radius: inherit; transition: width .6s cubic-bezier(.2, .8, .2, 1); }
.bar-thin { height: 4px; }
.ring { --p: 0; --s: 56px; width: var(--s); height: var(--s); border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--brand) calc(var(--p) * 1%), var(--bg-sunken) 0); position: relative; flex: none; }
.ring::before { content: ""; position: absolute; inset: 6px; background: var(--bg-elev); border-radius: 50%; }
.ring > span { position: relative; font: 700 .8rem/1 var(--font-display); }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius); }
table.table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .92rem; }
.table th { text-align: left; font: 600 .76rem/1.2 var(--font); text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); padding: .75rem 1rem; border-bottom: 1px solid var(--line); background: var(--bg-sunken); position: sticky; top: 0; white-space: nowrap; }
.table td { padding: .8rem 1rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: var(--bg-hover); }
.table a { font-weight: 600; }

/* tabs */
.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { padding: .8rem 1rem; color: var(--ink-3); font-weight: 600; white-space: nowrap; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tabs a:hover { color: var(--ink); text-decoration: none; }
.tabs a[aria-current="page"] { color: var(--brand); border-color: var(--brand); }
.seg { display: inline-flex; background: var(--bg-sunken); border-radius: 999px; padding: 4px; gap: 2px; }
.seg a, .seg button { border: 0; background: none; padding: .45rem .9rem; border-radius: 999px; font: 600 .85rem/1 var(--font); color: var(--ink-3); cursor: pointer; }
.seg [aria-current="page"], .seg [aria-pressed="true"] { background: var(--bg-elev); color: var(--ink); box-shadow: var(--shadow-s); text-decoration: none; }

/* stat tiles */
.stats { display: grid; gap: .9rem; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; box-shadow: var(--shadow-s); }
.stat .k { font-size: .8rem; color: var(--ink-3); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.stat .v { font: 800 1.9rem/1.1 var(--font-display); letter-spacing: -.02em; margin-top: .3rem; }
.stat .d { font-size: .82rem; color: var(--ink-3); margin-top: .2rem; }

.empty { text-align: center; padding: 3rem 1.5rem; color: var(--ink-3); }
.empty svg { color: var(--brand); opacity: .7; margin-bottom: .75rem; }
.empty h3 { color: var(--ink); }

.chev { font-family: var(--font-display); font-weight: 800; color: var(--brand); letter-spacing: -.12em; }

/* menus (details/summary) */
details.menu { position: relative; }
details.menu > summary { list-style: none; cursor: pointer; }
details.menu > summary::-webkit-details-marker { display: none; }
details.menu > .menu-list { position: absolute; right: 0; top: calc(100% + 8px); min-width: 230px; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow-l); padding: .4rem; z-index: 60; animation: pop .14s ease; }
.menu-list a, .menu-list button { display: flex; align-items: center; gap: .6rem; width: 100%; padding: .6rem .75rem; border-radius: 10px; color: var(--ink); font: 500 .92rem/1.2 var(--font); background: none; border: 0; cursor: pointer; text-align: left; }
.menu-list a:hover, .menu-list button:hover { background: var(--bg-hover); text-decoration: none; }
.menu-list hr { margin: .35rem 0; }
@keyframes pop { from { opacity: 0; transform: translateY(-4px) scale(.98); } }

dialog { border: 0; border-radius: var(--radius-l); padding: 0; background: var(--bg-elev); color: var(--ink); box-shadow: var(--shadow-l); width: min(560px, calc(100vw - 2rem)); max-height: calc(100dvh - 2rem); }
dialog::backdrop { background: rgba(14, 5, 16, .55); backdrop-filter: blur(3px); }
dialog .card-h { border-radius: var(--radius-l) var(--radius-l) 0 0; }

.toast-host { position: fixed; z-index: 100; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom)); transform: translateX(-50%); display: grid; gap: 8px; width: min(440px, calc(100vw - 32px)); }
.toast { background: var(--ink); color: var(--bg); padding: .8rem 1rem; border-radius: 12px; box-shadow: var(--shadow-l); font-weight: 500; animation: pop .2s ease; }
.toast.bad { background: var(--bad); color: #fff; }
.skel { background: linear-gradient(90deg, var(--bg-sunken), var(--bg-hover), var(--bg-sunken)); background-size: 200% 100%; animation: sk 1.2s infinite; border-radius: 8px; }
@keyframes sk { to { background-position: -200% 0; } }

/* ───────── app chrome ───────── */
.topbar { position: sticky; top: 0; z-index: 50; height: var(--topbar-h); display: flex; align-items: center; gap: 1rem; padding: 0 max(16px, env(safe-area-inset-left)); background: color-mix(in srgb, var(--bg-elev) 82%, transparent); backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--ink); text-decoration: none !important; flex: none; }
.brand img { height: 22px; width: auto; display: block; }
:root[data-theme="dark"] .brand .logo-dark, .brand .logo-light { display: block; }
.brand .logo-dark { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand .logo-light { display: none; } :root:not([data-theme="light"]) .brand .logo-dark { display: block; } }
:root[data-theme="dark"] .brand .logo-light { display: none; }
:root[data-theme="dark"] .brand .logo-dark { display: block; }
.brand .tag { font: 700 .7rem/1 var(--font); letter-spacing: .08em; text-transform: uppercase; color: var(--brand); background: var(--brand-soft); padding: .3rem .5rem; border-radius: 6px; }
.nav { display: flex; gap: .25rem; }
.nav a { padding: .55rem .9rem; border-radius: 999px; color: var(--ink-2); font-weight: 600; font-size: .94rem; }
.nav a:hover { background: var(--bg-hover); text-decoration: none; color: var(--ink); }
.nav a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); }
.topbar .spacer { flex: 1; }
.icon-btn { width: 40px; height: 40px; display: inline-grid; place-items: center; border-radius: 50%; color: var(--ink-2); background: none; border: 0; cursor: pointer; position: relative; }
.icon-btn:hover { background: var(--bg-hover); color: var(--ink); }
.icon-btn .pip { position: absolute; top: 8px; right: 8px; width: 9px; height: 9px; border-radius: 50%; background: var(--brand-bright); border: 2px solid var(--bg-elev); }

.page { max-width: var(--content-max); margin: 0 auto; padding: clamp(1rem, .6rem + 1.6vw, 2rem) max(16px, env(safe-area-inset-left)) calc(96px + env(safe-area-inset-bottom)); }
@media (min-width: 900px) { .page { padding-bottom: 3rem; } }
.page-h { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.page-h h1 { margin: 0; }
.page-h .sub { color: var(--ink-3); margin-top: .35rem; }
.crumbs { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; font-size: .85rem; color: var(--ink-3); margin-bottom: .6rem; }
.crumbs a { color: var(--ink-3); }
.crumbs .sep { opacity: .5; }

/* bottom tab bar on phones */
.tabbar { position: fixed; z-index: 55; left: 0; right: 0; bottom: 0; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: color-mix(in srgb, var(--bg-elev) 92%, transparent); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
.tabbar a { display: grid; justify-items: center; gap: 3px; padding: 9px 4px 8px; color: var(--ink-3); font: 600 .7rem/1 var(--font); }
.tabbar a[aria-current="page"] { color: var(--brand); }
.tabbar a:hover { text-decoration: none; }
@media (min-width: 900px) { .tabbar { display: none; } }

/* hero */
.hero { position: relative; overflow: hidden; color: #fff; background: var(--grad-deep); border-radius: var(--radius-l); padding: clamp(1.5rem, 1rem + 3vw, 3rem); isolation: isolate; }
.hero::after { content: "»"; position: absolute; right: -0.05em; bottom: -0.32em; font: 900 clamp(10rem, 6rem + 18vw, 22rem)/1 var(--font-display); color: rgba(255, 71, 255, .09); letter-spacing: -.12em; z-index: -1; pointer-events: none; }
.hero h1 { color: #fff; }
.hero .sub { color: rgba(255, 255, 255, .75); max-width: 60ch; }
.hero .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .35); }
.hero .btn-ghost:hover { background: rgba(255, 255, 255, .1); }
.hero .bar { background: rgba(255, 255, 255, .15); }

/* course cards */
.ccard { display: flex; flex-direction: column; overflow: hidden; height: 100%; }
.ccard .cover { aspect-ratio: 16 / 8; background: var(--grad-deep); position: relative; overflow: hidden; }
.ccard .cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.ccard:hover .cover img { transform: scale(1.04); }
.ccard .cover .org { position: absolute; left: 12px; top: 12px; }
.ccard .cover .monogram { position: absolute; inset: 0; display: grid; place-items: center; font: 800 2.4rem/1 var(--font-display); color: rgba(255, 255, 255, .9); letter-spacing: -.03em; }
.ccard .body { padding: 1rem 1.1rem 1.1rem; display: flex; flex-direction: column; gap: .55rem; flex: 1; }
.ccard h3 { margin: 0; font-size: 1.02rem; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ccard .meta { display: flex; gap: .5rem .9rem; flex-wrap: wrap; font-size: .82rem; color: var(--ink-3); }
.ccard .foot { margin-top: auto; padding-top: .4rem; }

/* ───────── admin shell ───────── */
.shell { display: grid; grid-template-columns: 1fr; min-height: 100dvh; }
@media (min-width: 1000px) { .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); } }
.sidebar { display: none; position: sticky; top: 0; height: 100dvh; overflow-y: auto; background: var(--bg-elev); border-right: 1px solid var(--line); padding: 1rem .75rem; }
@media (min-width: 1000px) { .sidebar { display: flex; flex-direction: column; gap: 1rem; } }
.sidebar .brand { padding: .4rem .6rem .8rem; }
.side-nav { display: grid; gap: 2px; }
.side-nav .grp { font: 700 .7rem/1 var(--font); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); padding: 1rem .75rem .45rem; }
.side-nav a { display: flex; align-items: center; gap: .7rem; padding: .6rem .75rem; border-radius: 10px; color: var(--ink-2); font-weight: 600; font-size: .92rem; }
.side-nav a svg { flex: none; opacity: .8; }
.side-nav a:hover { background: var(--bg-hover); color: var(--ink); text-decoration: none; }
.side-nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-ink); }
.side-nav a[aria-current="page"] svg { opacity: 1; color: var(--brand); }
.side-foot { margin-top: auto; }
.main { min-width: 0; }
.mobile-drawer[open] { position: fixed; inset: 0; z-index: 80; }
.mobile-drawer > summary { list-style: none; }
.mobile-drawer > summary::-webkit-details-marker { display: none; }
.mobile-drawer .drawer { position: fixed; inset: 0 auto 0 0; width: min(86vw, 320px); background: var(--bg-elev); z-index: 81; padding: 1rem .75rem; overflow-y: auto; box-shadow: var(--shadow-l); animation: slide .2s ease; }
.mobile-drawer .scrim { position: fixed; inset: 0; background: rgba(14, 5, 16, .5); z-index: 80; }
@keyframes slide { from { transform: translateX(-100%); } }

/* ───────── auth ───────── */
.auth { min-height: 100dvh; display: grid; grid-template-columns: 1fr; }
@media (min-width: 960px) { .auth { grid-template-columns: 1.05fr 1fr; } }
.auth-art { display: none; position: relative; overflow: hidden; background: var(--grad-deep); color: #fff; padding: 3rem; }
@media (min-width: 960px) { .auth-art { display: flex; flex-direction: column; justify-content: space-between; } }
.auth-art::after { content: "»"; position: absolute; right: -.08em; bottom: -.3em; font: 900 34rem/1 var(--font-display); letter-spacing: -.14em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .55; pointer-events: none; }
.auth-art h2 { font-size: clamp(2rem, 1rem + 2.4vw, 3.1rem); font-weight: 800; letter-spacing: -.03em; max-width: 14ch; color: #fff; position: relative; z-index: 1; }
.auth-art p { color: rgba(255, 255, 255, .72); max-width: 42ch; position: relative; z-index: 1; }
.auth-form { display: grid; place-items: center; padding: 2rem max(16px, env(safe-area-inset-left)); }
.auth-card { width: min(420px, 100%); }
.auth-card h1 { font-size: 1.9rem; margin-bottom: .3rem; }

/* ───────── course player ───────── */
.player { display: grid; grid-template-columns: 1fr; min-height: calc(100dvh - var(--topbar-h)); }
@media (min-width: 1100px) { .player { grid-template-columns: var(--outline-w) minmax(0, 1fr); } }
.player-side { display: none; border-right: 1px solid var(--line); background: var(--bg-elev); position: sticky; top: var(--topbar-h); height: calc(100dvh - var(--topbar-h)); overflow-y: auto; overscroll-behavior: contain; }
@media (min-width: 1100px) { .player-side { display: block; } }
.player-main { min-width: 0; }
.unit { max-width: var(--read-max); margin: 0 auto; padding: 1.5rem max(16px, env(safe-area-inset-left)) calc(110px + env(safe-area-inset-bottom)); }
.unit-head { margin-bottom: 1.25rem; }
.unit-head h1 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.9rem); margin: .25rem 0 0; }
.seqbar { display: flex; gap: 4px; margin: 1rem 0 0; }
.seqbar a { flex: 1; height: 6px; border-radius: 999px; background: var(--bg-sunken); }
.seqbar a.done { background: color-mix(in srgb, var(--brand) 45%, var(--bg-sunken)); }
.seqbar a[aria-current="page"] { background: var(--brand); }
.block { margin: 1.75rem 0; }
.block + .block { padding-top: 1.75rem; border-top: 1px dashed var(--line); }
.block-title { font: 700 1.05rem/1.3 var(--font-display); margin: 0 0 .75rem; }
.prose { font-size: 1.04rem; line-height: 1.7; overflow-wrap: anywhere; }
.prose h1, .prose h2, .prose h3, .prose h4 { margin-top: 1.4em; }
.prose img { border-radius: 12px; }
.prose table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .5rem .7rem; }
.prose pre { background: var(--bg-sunken); padding: 1rem; border-radius: 12px; overflow-x: auto; }
.prose blockquote { margin: 1rem 0; padding: .5rem 1rem; border-left: 3px solid var(--brand); background: var(--bg-sunken); border-radius: 0 10px 10px 0; }
.prose iframe { border: 0; border-radius: 12px; width: 100%; aspect-ratio: 16 / 9; height: auto; }
.video { position: relative; border-radius: 16px; overflow: hidden; background: #000; aspect-ratio: 16 / 9; box-shadow: var(--shadow); }
.video video, .video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.player-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: flex; gap: .75rem; justify-content: space-between; align-items: center; padding: .7rem max(16px, env(safe-area-inset-left)) calc(.7rem + env(safe-area-inset-bottom)); background: color-mix(in srgb, var(--bg-elev) 90%, transparent); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-top: 1px solid var(--line); }
@media (min-width: 1100px) { .player-nav { left: var(--outline-w); } }
.player-nav .where { font-size: .82rem; color: var(--ink-3); text-align: center; }

.outline { padding: .75rem; }
.outline details { border-radius: 12px; }
.outline summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: .6rem; padding: .7rem .75rem; border-radius: 10px; font-weight: 700; font-size: .92rem; }
.outline summary::-webkit-details-marker { display: none; }
.outline summary:hover { background: var(--bg-hover); }
.outline summary .caret { transition: transform .15s; color: var(--ink-3); margin-left: auto; }
.outline details[open] > summary .caret { transform: rotate(90deg); }
.outline ul { list-style: none; margin: 0; padding: 0 0 .4rem; }
.outline li a { display: flex; align-items: flex-start; gap: .6rem; padding: .5rem .75rem .5rem 1rem; border-radius: 10px; color: var(--ink-2); font-size: .9rem; }
.outline li a:hover { background: var(--bg-hover); text-decoration: none; }
.outline li a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-ink); font-weight: 600; }
.tick { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--line-strong); flex: none; margin-top: 1px; display: grid; place-items: center; }
.tick.done { background: var(--ok); border-color: var(--ok); color: #fff; }
.tick.part { border-color: var(--brand); background: conic-gradient(var(--brand) 50%, transparent 0); }

/* problems */
.problem { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow-s); }
.problem .q { margin-bottom: 1rem; }
.choices { display: grid; gap: .6rem; margin: .75rem 0 1rem; }
.choice { display: flex; gap: .75rem; align-items: flex-start; padding: .8rem 1rem; border: 1.5px solid var(--line-strong); border-radius: 12px; cursor: pointer; transition: border-color .15s, background .15s; }
.choice:hover { border-color: var(--brand); background: var(--bg-hover); }
.choice input { accent-color: var(--brand); width: 18px; height: 18px; margin: 2px 0 0; flex: none; }
.choice:has(input:checked) { border-color: var(--brand); background: var(--brand-soft); }
.choice.correct { border-color: var(--ok); background: var(--ok-soft); }
.choice.incorrect { border-color: var(--bad); background: var(--bad-soft); }
.result { display: flex; gap: .6rem; align-items: center; padding: .7rem .9rem; border-radius: 10px; font-weight: 600; margin-top: .75rem; }
.result.ok { background: var(--ok-soft); color: var(--ok); }
.result.no { background: var(--bad-soft); color: var(--bad); }
.result.part { background: var(--warn-soft); color: var(--warn); }
.problem-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }

/* timeline / list */
.list { display: grid; }
.list > * { padding: .9rem 1.1rem; border-bottom: 1px solid var(--line); }
.list > *:last-child { border-bottom: 0; }
.kv { display: grid; grid-template-columns: minmax(120px, 34%) 1fr; gap: .6rem 1rem; font-size: .93rem; }
.kv dt { color: var(--ink-3); }
.kv dd { margin: 0; overflow-wrap: anywhere; }

.pager { display: flex; gap: .4rem; align-items: center; justify-content: center; margin-top: 1.25rem; flex-wrap: wrap; }

/* calendar-ish session list */
.session { display: grid; grid-template-columns: 64px 1fr auto; gap: 1rem; align-items: center; }
.date-chip { text-align: center; border-radius: 12px; background: var(--brand-soft); color: var(--brand-ink); padding: .5rem 0; font-weight: 700; line-height: 1.1; }
.date-chip .m { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; }
.date-chip .d { font: 800 1.4rem/1 var(--font-display); }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }
@media print { .topbar, .tabbar, .sidebar, .player-nav, .player-side { display: none !important; } body { background: #fff; } }