:root {
    --white: #ffffff;
    --ink: #06111f;
    --ink-soft: #344054;
    --muted: #667085;
    --primary: #1769ff;
    --primary-hover: #0f58dc;
    --primary-soft: #edf4ff;
    --border: #dce5f2;
    --border-strong: #c7d7ec;
    --surface: #f7f9fc;
    --success: #0f8a5f;
    --success-soft: #e9f8f1;
    --warning: #b76e00;
    --danger: #c82333;
    --danger-soft: #fff0f2;
    --navy: #07182b;
    --navy-raised: #102b4c;
    --sans: "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --serif: "Instrument Serif", Georgia, serif;
    --shadow-soft: none;
    --shadow-live: none;
    --radius-sm: 7px;
    --radius: 10px;
    --radius-lg: 12px;
    --sidebar-width: 216px;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--white); }
body { margin: 0; min-height: 100%; color: var(--ink); background: var(--white); font-family: var(--sans); font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }

:focus-visible { outline: 3px solid rgba(23, 105, 255, 0.28); outline-offset: 3px; }
.icon { flex: 0 0 auto; }
.muted-copy { color: var(--muted); margin: 18px 0 4px; }
.desktop-only { display: flex; }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 8px; padding: 10px 17px; font-weight: 700; font-size: 14px; line-height: 1; cursor: pointer; transition: background-color .18s ease, border-color .18s ease; }
.button:hover { transform: none; }
.button--primary { color: var(--white); background: var(--primary); box-shadow: none; }
.button--primary:hover { background: var(--primary-hover); }
.button--secondary { color: var(--primary); border-color: var(--border-strong); background: var(--white); }
.button--secondary:hover { border-color: var(--primary); background: var(--primary-soft); }
.button--disabled { color: #71809a; border-color: var(--border); background: #eef2f7; box-shadow: none; cursor: not-allowed; }
.button--disabled:hover { transform: none; }
.button--small { min-height: 38px; padding: 8px 13px; font-size: 13px; }
.button--large { min-height: 50px; padding-inline: 24px; font-size: 15px; }
.button--full { width: 100%; }
.icon-button { width: 42px; height: 42px; padding: 0; border: 0; border-radius: 10px; color: var(--ink); background: transparent; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; }
.icon-button:hover { background: var(--primary-soft); color: var(--primary); }

.alert { border: 1px solid; border-radius: 8px; padding: 12px 15px; margin-bottom: 18px; font-size: 14px; }
.alert--error { color: #9f1524; background: var(--danger-soft); border-color: #fac5cc; }
.alert--success { color: #08744e; background: var(--success-soft); border-color: #b9ead6; }

/* Authentication */
.auth-body { min-height: 100vh; background: var(--surface); }
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(320px, 42%) 1fr; }
.auth-brand-panel { min-height: 100vh; padding: clamp(36px, 6vw, 88px); color: var(--white); background: var(--navy); display: flex; flex-direction: column; justify-content: space-between; }
.auth-brand-logo { width: min(230px, 70%); height: auto; }
.auth-brand-copy h1 { margin: 0 0 26px; font: 760 clamp(50px, 6vw, 82px)/.92 var(--sans); letter-spacing: -.055em; }
.auth-brand-copy p { max-width: 370px; margin: 0; color: #c4d2e5; font-size: 17px; }
.auth-brand-foot { margin: 0; color: #89a0be; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.auth-form-panel { min-height: 100vh; display: grid; place-items: center; padding: 40px 24px; background: var(--white); }
.auth-card { width: min(440px, 100%); }
.auth-mobile-logo { display: none; width: 182px; margin-bottom: 36px; }
.auth-kicker { margin: 0 0 12px; color: var(--primary); font-size: 12px; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.auth-card h2 { margin: 0 0 12px; font: 760 clamp(38px, 4vw, 52px)/1 var(--sans); letter-spacing: -.045em; }
.auth-intro { margin: 0 0 30px; color: var(--muted); font-size: 16px; }
.auth-help { margin: 24px 0 0; color: var(--muted); font-size: 13px; text-align: center; }
.form-stack { display: grid; gap: 18px; }
.form-field { display: grid; gap: 8px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
.form-field input { width: 100%; min-height: 50px; border: 1px solid var(--border-strong); border-radius: 8px; padding: 12px 14px; color: var(--ink); background: var(--white); outline: none; }
.form-field input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(23, 105, 255, .12); }
.form-field small { color: var(--muted); font-weight: 400; }
.password-field { position: relative; display: block; }
.password-field input { padding-right: 68px; }
.password-field button { position: absolute; top: 6px; right: 7px; height: 38px; border: 0; border-radius: 8px; color: var(--primary); background: transparent; font-size: 12px; font-weight: 800; cursor: pointer; }
.simple-error { min-height: 100vh; display: grid; align-content: center; justify-items: start; gap: 16px; max-width: 600px; padding: 40px; margin: auto; }
.simple-error h1 { margin: 0; font: 400 64px/1 var(--serif); }
.simple-error p { color: var(--muted); }

/* Shared application shell */
.app-shell { min-height: 100vh; }
.sidebar { position: fixed; inset: 0 auto 0 0; z-index: 30; width: var(--sidebar-width); padding: 28px 14px 22px; color: #d8e3f1; background: var(--navy); display: flex; flex-direction: column; }
.sidebar-brand { padding: 0 10px 28px; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-brand img { width: 160px; height: auto; }
.sidebar-brand span { display: block; margin-top: 7px; color: #89a0be; font-size: 10px; letter-spacing: .18em; text-transform: uppercase; }
.sidebar-nav { display: grid; gap: 4px; margin-top: 22px; overflow-y: auto; }
.sidebar-link { min-height: 44px; padding: 10px 11px; border-radius: 7px; color: #c8d4e3; display: flex; align-items: center; gap: 12px; font-size: 13px; font-weight: 570; }
.sidebar-link:hover { color: var(--white); background: rgba(255,255,255,.06); }
.sidebar-link.is-active { color: var(--white); background: rgba(255,255,255,.08); box-shadow: none; }
.sidebar-link.is-active .icon { color: #72a6ff; }
.sidebar-foot { margin-top: auto; padding: 20px 10px 0; border-top: 1px solid rgba(255,255,255,.12); }
.sidebar-motto p { margin: 0 0 16px; color: #8ea3bf; font-size: 13px; line-height: 1.3; letter-spacing: .08em; }
.sidebar-motto span { color: #6f85a2; font-size: 10px; }
.mobile-account { display: none; }
.app-main { min-height: 100vh; margin-left: var(--sidebar-width); }
.page-content { width: min(1380px, 100%); margin: 0 auto; padding: 32px clamp(26px, 3.6vw, 58px) 58px; }
.page-header { min-height: 66px; margin-bottom: 24px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.page-header h1 { margin: 0 0 7px; font: 760 clamp(30px, 3vw, 40px)/1 var(--sans); letter-spacing: -.045em; }
.page-header p { margin: 0; color: var(--muted); }
.profile-menu { min-width: max-content; display: flex; align-items: center; gap: 11px; }
.profile-menu > span:nth-child(2) { display: grid; gap: 1px; }
.profile-menu strong { font-size: 13px; }
.profile-menu small { color: var(--muted); font-size: 11px; }
.avatar { width: 38px; height: 38px; border: 1px solid var(--border); border-radius: 50%; color: var(--ink); background: var(--white); display: inline-grid; place-items: center; font-size: 13px; font-weight: 800; }
.avatar--large { width: 44px; height: 44px; }
.mobile-account-trigger { padding: 0; cursor: pointer; }
.mobile-topbar, .mobile-nav, .sidebar-scrim { display: none; }

.section-heading { min-height: 34px; margin-bottom: 14px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.section-heading h2 { margin: 0; font-size: 19px; line-height: 1.2; letter-spacing: -.02em; }
.section-heading a:not(.button) { color: var(--primary); display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; }
.panel { border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; background: var(--white); }
.status { width: fit-content; min-height: 22px; border-radius: 0; padding: 2px 0; display: inline-flex; align-items: center; gap: 5px; font-size: 10px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.status--blue { color: #0759dc; background: transparent; }
.status--green { color: #08744e; background: transparent; }
.empty-state { min-height: 100px; padding: 18px; border: 1px dashed var(--border-strong); border-radius: 12px; background: var(--surface); display: flex; align-items: center; gap: 14px; }
.empty-state > span { width: 42px; height: 42px; border-radius: 8px; color: var(--ink-soft); background: var(--white); border: 1px solid var(--border); display: grid; place-items: center; }
.empty-state strong { display: block; margin-bottom: 3px; }
.empty-state p { margin: 0; color: var(--muted); font-size: 13px; }
.empty-state .button { margin-left: auto; }
.empty-state--compact { min-height: 82px; }

/* Admin dashboard */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-bottom: 22px; border-block: 1px solid var(--border); }
.metric { min-height: 92px; border: 0; border-radius: 0; padding: 18px; background: var(--white); display: flex; align-items: center; gap: 13px; }
.metric + .metric { border-left: 1px solid var(--border); }
.metric__icon { width: 38px; height: 38px; border-radius: 0; color: var(--ink-soft); background: transparent; display: grid; place-items: center; }
.metric div { display: grid; }
.metric span { color: var(--muted); font-size: 12px; }
.metric strong { font-size: 26px; line-height: 1.1; }
.admin-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; align-items: start; }
.admin-primary, .admin-rail { display: grid; gap: 18px; }
.table-wrap { width: 100%; overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.data-table th { padding: 10px; color: var(--muted); background: var(--surface); text-align: left; font-size: 10px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.data-table td { padding: 13px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: 0; }
.data-table td strong, .data-table td small { display: block; }
.data-table td small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.table-progress { width: 76px; height: 6px; border-radius: 999px; overflow: hidden; background: #e8edf5; }
.table-progress span { height: 100%; display: block; background: var(--primary); }
.quick-actions { display: grid; gap: 1px; }
.quick-action { min-height: 64px; border-top: 1px solid var(--border); display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 10px; }
.quick-action:hover { color: var(--primary); }
.quick-action > span { width: 34px; height: 34px; border-radius: 7px; color: var(--ink-soft); border: 1px solid var(--border); background: var(--white); display: grid; place-items: center; }
.quick-action div { display: grid; gap: 2px; }
.quick-action strong { font-size: 12px; }
.quick-action small { color: var(--muted); font-size: 10px; }
.activity-list { position: relative; list-style: none; padding: 0 0 0 12px; margin: 4px 0 0; }
.activity-list::before { content: ""; position: absolute; top: 9px; bottom: 12px; left: 4px; width: 1px; background: var(--border-strong); }
.activity-list li { position: relative; padding: 0 0 18px 20px; }
.activity-list li > span { position: absolute; top: 6px; left: -12px; width: 9px; height: 9px; border-radius: 50%; border: 2px solid var(--white); background: var(--primary); box-shadow: 0 0 0 1px var(--border-strong); }
.activity-list strong { font-size: 12px; }
.activity-list p { margin: 2px 0; color: var(--ink-soft); font-size: 11px; text-transform: capitalize; }
.activity-list small { color: var(--muted); font-size: 9px; }

/* Forms and secondary pages */
.page-header--compact h1 { font-family: var(--sans); font-size: clamp(28px, 3vw, 38px); font-weight: 760; }
.back-link { display: inline-flex; margin-bottom: 12px; color: var(--primary); font-size: 12px; font-weight: 700; }
.form-page { max-width: 1120px; }
.editor-form { display: grid; gap: 18px; }
.form-section { border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; display: grid; grid-template-columns: minmax(180px, .42fr) minmax(0, 1fr); gap: 38px; }
.form-section > div:first-child h2 { margin: 0 0 7px; font-size: 18px; }
.form-section > div:first-child p { margin: 0; color: var(--muted); font-size: 12px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 17px; }
.form-field--wide { grid-column: 1 / -1; }
.form-field textarea, .form-field select { width: 100%; border: 1px solid var(--border-strong); border-radius: 8px; padding: 12px 14px; color: var(--ink); background: var(--white); outline: none; }
.form-field select { min-height: 50px; }
.form-field textarea { resize: vertical; }
.form-field textarea:focus, .form-field select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(23,105,255,.12); }
.form-field select[multiple] { padding: 6px; }
.form-field select[multiple] option { padding: 9px; border-radius: 6px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; padding-top: 4px; }
.record-list { display: grid; gap: 10px; }
.record-list--inside { gap: 0; }
.record-row { min-height: 82px; border: 0; border-bottom: 1px solid var(--border); border-radius: 0; padding: 16px 4px; background: var(--white); display: grid; grid-template-columns: 42px minmax(0, 1fr) auto auto; align-items: center; gap: 15px; }
.record-list--inside .record-row { border-width: 1px 0 0; border-radius: 0; padding-inline: 0; }
.record-row__icon { width: 40px; height: 40px; border-radius: 7px; color: var(--ink-soft); background: var(--white); border: 1px solid var(--border); display: grid; place-items: center; }
.record-row strong { display: block; font-size: 13px; }
.record-row p { margin: 3px 0; color: var(--muted); font-size: 11px; }
.record-row small { color: var(--muted); font-size: 10px; }
.record-row dl { margin: 0; display: flex; gap: 28px; }
.record-row dl div { display: grid; }
.record-row dt { color: var(--muted); font-size: 9px; text-transform: uppercase; letter-spacing: .06em; }
.record-row dd { margin: 0; font-size: 15px; font-weight: 750; }
.split-page { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr); gap: 18px; align-items: start; }
.compact-form { display: grid; gap: 16px; }
.form-note { margin: 0; color: var(--muted); font-size: 10px; }
.voice-recorder { border: 1px solid var(--border); border-radius: 8px; padding: 13px; background: var(--surface); display: grid; gap: 11px; }
.voice-recorder > div:first-child { display: grid; gap: 2px; }
.voice-recorder strong { font-size: 12px; }
.voice-recorder small { color: var(--muted); font-size: 10px; }
.voice-recorder__actions { display: flex; gap: 8px; }
.voice-recorder.is-recording { border-color: #f0a9b2; background: var(--danger-soft); }
.voice-recorder audio { width: 100%; height: 40px; }
.voice-file-label { width: fit-content; color: var(--primary); font-size: 11px; font-weight: 750; cursor: pointer; }
.voice-file-label input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.thread-panel { margin-bottom: 18px; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; background: var(--white); display: grid; gap: 14px; }
.thread-message { max-width: 82%; border: 1px solid var(--border); border-radius: 3px 8px 8px 8px; padding: 14px; background: var(--white); justify-self: start; }
.thread-message--mentor { border-radius: 8px 3px 8px 8px; background: #f5f8fd; justify-self: end; }
.thread-message__meta { display:flex; justify-content:space-between; gap:18px; margin-bottom:8px; }
.thread-message__meta strong { font-size:12px; }
.thread-message__meta span { color:var(--muted); font-size:9px; }
.thread-message p { margin:0; color:var(--ink-soft); font-size:13px; }
.thread-message audio { width:min(360px,100%); margin-top:10px; }
.fee-overview { margin-bottom: 18px; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.fee-overview > div { min-height: 108px; padding: 20px; display: grid; align-content: center; gap: 7px; }
.fee-overview > div + div { border-left: 1px solid var(--border); }
.fee-overview span, .profile-sheet span { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .05em; }
.fee-overview strong { font-size: 22px; }
.profile-sheet { max-width: 780px; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: grid; grid-template-columns: 130px 1fr 1fr; gap: 0 26px; }
.profile-sheet__avatar { grid-row: 1 / span 4; width: 112px; height: 112px; border-radius: 50%; color: var(--primary); background: var(--primary-soft); display: grid; place-items: center; font: 400 52px/1 var(--serif); }
.profile-sheet > div:not(.profile-sheet__avatar) { min-height: 74px; border-bottom: 1px solid var(--border); display: grid; align-content: center; gap: 4px; }
.profile-sheet > div strong { font-size: 13px; }
.profile-sheet__action { grid-column: 2 / -1; border-bottom: 0 !important; justify-items: start; }
.module-placeholder { min-height:260px; border:1px dashed var(--border-strong); border-radius:var(--radius); background:var(--surface); display:grid; place-items:center; align-content:center; gap:14px; text-align:center; }
.module-placeholder>span { width:70px;height:70px;border-radius:50%;color:var(--primary);background:var(--primary-soft);display:grid;place-items:center; }
.module-placeholder strong { font-size:17px; }
.module-placeholder p { max-width:500px;margin:6px auto 0;color:var(--muted);font-size:13px; }
.check-field { min-height: 50px; display: flex; align-items: center; gap: 9px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
.check-field input { width: 17px; height: 17px; accent-color: var(--primary); }

/* Curriculum */
.curriculum-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.curriculum-tree { min-width: 0; display: grid; gap: 18px; }
.curriculum-stage { border: 1px solid var(--border); border-radius: var(--radius); background: var(--white); overflow: hidden; }
.curriculum-stage > header { padding: 18px 20px; border-bottom: 1px solid var(--border); background: var(--surface); }
.curriculum-stage > header span, .assignment-brief span, .class-summary span, .class-notes span { color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.curriculum-stage h2 { margin: 4px 0 0; font-size: 18px; }
.curriculum-module { padding: 18px 20px; border-bottom: 1px solid var(--border); }
.curriculum-module__heading { display: flex; align-items: center; gap: 10px; }
.curriculum-module__heading > span { color: var(--primary); }
.curriculum-module__heading div { display: grid; }
.curriculum-module__heading strong { font-size: 14px; }
.curriculum-module__heading small { color: var(--muted); font-size: 10px; }
.curriculum-module ol { margin: 14px 0 0 31px; padding: 0; list-style: none; }
.curriculum-module li { min-height: 48px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.curriculum-module li > span { color: var(--muted); }
.curriculum-module li div { display: grid; }
.curriculum-module li strong { font-size: 12px; }
.curriculum-module li small { color: var(--muted); font-size: 9px; }
.curriculum-aside { position: sticky; top: 24px; }
.inline-create { margin: 13px 0 0 31px; }
.inline-create--module { margin: 0; padding: 15px 20px; }
.inline-create summary { width: fit-content; color: var(--primary); font-size: 11px; font-weight: 750; cursor: pointer; }
.inline-create form { max-width: 680px; margin-top: 12px; display: grid; gap: 10px; }
.inline-create input, .inline-create textarea, .inline-create select { width: 100%; min-height: 42px; border: 1px solid var(--border-strong); border-radius: 7px; padding: 9px 11px; color: var(--ink); background: var(--white); }
.inline-fields { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: center; }
.inline-fields label { display: flex; align-items: center; gap: 7px; color: var(--ink-soft); font-size: 11px; }
.inline-fields label input { width: 15px; min-height: 15px; }

/* Assignment workflow */
.assignment-brief { margin-bottom: 24px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; }
.assignment-brief p { max-width: 840px; margin: 8px 0 0; color: var(--ink-soft); font-size: 13px; }
.assignment-brief dl { margin: 0; display: flex; gap: 28px; }
.assignment-brief dt, .student-assignment dt { color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.assignment-brief dd, .student-assignment dd { margin: 4px 0 0; font-size: 12px; font-weight: 750; }
.submission-list { display: grid; gap: 12px; }
.submission-list > .section-heading { margin-bottom: 0; }
.submission-list .muted-copy { margin: 0; font-size: 11px; }
.submission-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; background: var(--white); }
.submission-card > header { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 11px; }
.submission-card > header > div:nth-child(2) { display: grid; }
.submission-card > header strong { font-size: 13px; }
.submission-card > header small { color: var(--muted); font-size: 10px; }
.submission-content { margin: 16px 0 0 50px; padding: 14px 0; border-block: 1px solid var(--border); }
.submission-content p { margin: 0 0 10px; color: var(--ink-soft); font-size: 12px; }
.submission-links { display: flex; flex-wrap: wrap; gap: 8px; }
.submission-empty { margin: 14px 0 0 50px; padding-top: 13px; border-top: 1px solid var(--border); color: var(--muted); font-size: 11px; }
.review-form { margin: 14px 0 0 50px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.review-form > div { display: flex; gap: 8px; }
.student-assignment-list { display: grid; gap: 18px; }
.student-assignment { border: 1px solid var(--border); border-radius: var(--radius); background: var(--white); overflow: hidden; }
.student-assignment > header { padding: 22px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; }
.student-assignment h2 { margin: 7px 0 6px; font-size: 20px; letter-spacing: -.025em; }
.student-assignment header p { max-width: 760px; margin: 0; color: var(--ink-soft); font-size: 13px; }
.student-assignment dl { min-width: 180px; margin: 0; display: grid; gap: 12px; align-content: start; }
.mentor-feedback { padding: 15px 22px; border-top: 1px solid #cfe2ff; border-bottom: 1px solid #cfe2ff; background: var(--primary-soft); }
.mentor-feedback strong { color: var(--primary); font-size: 11px; }
.mentor-feedback p { margin: 5px 0 0; color: var(--ink-soft); font-size: 12px; }
.previous-submission { min-height: 52px; padding: 12px 22px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.previous-submission > span { color: var(--muted); font-size: 10px; }
.previous-submission > div { display: flex; gap: 14px; }
.previous-submission a { color: var(--primary); font-size: 11px; font-weight: 750; }
.assignment-submit { padding: 20px 22px; border-top: 1px solid var(--border); background: var(--surface); display: grid; gap: 14px; }
.assignment-submit .form-actions { padding: 0; }

/* Class attendance */
.class-summary { margin-bottom: 18px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.class-summary .panel { min-height: 82px; border: 0; border-radius: 0; display: grid; align-content: center; gap: 6px; }
.class-summary .panel + .panel { border-left: 1px solid var(--border); }
.class-summary strong { font-size: 13px; }
.class-notes { margin-bottom: 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.class-notes p { margin: 7px 0 0; color: var(--ink-soft); font-size: 12px; }
.attendance-form { display: grid; gap: 14px; }
.attendance-form .section-heading p { margin: 3px 0 0; color: var(--muted); font-size: 11px; }
.session-status { width: 190px; }
.attendance-list { display: grid; }
.attendance-row { min-height: 82px; padding: 13px 0; border-top: 1px solid var(--border); display: grid; grid-template-columns: minmax(220px, 1fr) 180px minmax(220px, 1fr); gap: 16px; align-items: end; }
.attendance-student { align-self: center; display: flex; align-items: center; gap: 11px; }
.attendance-student > div { display: grid; }
.attendance-student strong { font-size: 13px; }
.attendance-student small { color: var(--muted); font-size: 10px; }

/* Student administration */
.header-actions { display: flex; align-items: center; gap: 12px; }
.credential-alert { font-weight: 650; }
.student-admin-metrics { margin-bottom: 22px; display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--border); }
.student-admin-metrics article { min-height: 102px; padding: 18px 20px; display: grid; align-content: center; gap: 3px; }
.student-admin-metrics article + article { border-left: 1px solid var(--border); }
.student-admin-metrics span { color: var(--muted); font-size: 10px; font-weight: 750; letter-spacing: .05em; text-transform: uppercase; }
.student-admin-metrics strong { font-size: 24px; letter-spacing: -.03em; }
.student-admin-metrics small { color: var(--muted); font-size: 10px; }
.student-admin-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 20px; align-items: start; }
.student-admin-main, .student-admin-rail { display: grid; gap: 18px; }
.student-admin-rail { position: sticky; top: 24px; }
.detail-grid { margin: 0; display: grid; grid-template-columns: 1fr 1fr; }
.detail-grid > div { min-height: 72px; padding: 15px 4px; border-top: 1px solid var(--border); display: grid; align-content: center; gap: 4px; }
.detail-grid > div:nth-child(odd) { margin-right: 18px; }
.detail-grid__wide { grid-column: 1 / -1; margin-right: 0 !important; }
.detail-grid dt, .rail-details dt { color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.detail-grid dd, .rail-details dd { margin: 0; color: var(--ink-soft); font-size: 12px; }
.rail-details { margin: 0; display: grid; }
.rail-details > div { min-height: 58px; border-top: 1px solid var(--border); display: grid; align-content: center; gap: 4px; }
.rail-details dd { color: var(--ink); font-weight: 700; }
.rail-divider { height: 1px; margin: 2px 0; background: var(--border); }

/* Student dashboard */
.student-page { max-width: 1500px; }
.student-header { margin-bottom: 20px; }
.live-session { position: relative; min-height: 190px; border: 1px solid #c9daf3; border-radius: var(--radius-lg); padding: 28px; background: #f6f9fe; box-shadow: none; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr); gap: 38px; align-items: center; overflow: hidden; }
.live-session::after { display: none; }
.live-label { margin: 0 0 8px; color: var(--primary); display: flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.live-label span { width: 9px; height: 9px; border-radius: 50%; background: var(--primary); }
.live-session h2 { margin: 0 0 18px; font-size: clamp(27px, 3vw, 36px); line-height: 1.05; letter-spacing: -.04em; }
.session-meta { display: grid; gap: 10px; color: var(--ink-soft); font-size: 13px; }
.session-meta span { display: flex; align-items: center; gap: 9px; }
.live-session__action { min-height: 128px; padding: 18px 0 18px 38px; border: 0; border-left: 1px solid var(--border-strong); border-radius: 0; background: transparent; text-align: center; display: flex; flex-direction: column; justify-content: center; align-items: stretch; }
.live-session__action > p { margin: 0 0 8px; color: var(--muted); font-size: 11px; }
.live-session__action form, .live-session__action .button { width: 100%; }
.countdown { display: grid; gap: 2px; margin-bottom: 12px; }
.countdown strong { font-variant-numeric: tabular-nums; font-size: 26px; letter-spacing: .08em; }
.countdown small { color: var(--muted); font-size: 9px; }
.live-session__focus { display: none; }
.live-session__focus strong { display: block; margin-bottom: 8px; font-size: 12px; }
.live-session__focus p { margin: 0; color: var(--ink-soft); white-space: pre-line; font-size: 12px; line-height: 1.7; }
.live-session--empty { min-height: 150px; grid-template-columns: 1fr; }
.live-session--empty > div > p:last-child { margin: 0; color: var(--muted); }
.student-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .65fr); gap: 22px; margin-top: 22px; align-items: start; }
.student-primary { min-width: 0; display: grid; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.learning-section + .learning-overview, .learning-overview + .learning-section { margin-top: 20px; }
.lesson-feature { position: relative; min-height: 176px; border: 0; border-radius: 0; padding: 10px 0 18px; display: grid; grid-template-columns: 94px minmax(0, 1fr); gap: 20px; }
.lesson-feature__icon { width: 94px; min-height: 118px; border-radius: 8px; color: var(--ink-soft); background: #f5f7fa; border: 1px solid #edf1f6; display: grid; place-items: center; }
.lesson-feature__body { padding-bottom: 38px; }
.lesson-feature__body h3 { margin: 8px 0 6px; font-size: 18px; letter-spacing: -.02em; }
.lesson-feature__body p { max-width: 660px; margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.lesson-feature__progress { position: absolute; right: 18px; bottom: 18px; left: 142px; display: grid; grid-template-columns: auto minmax(90px, 1fr) auto; align-items: center; gap: 10px; color: var(--muted); font-size: 10px; }
.lesson-feature__progress > div { height: 7px; border-radius: 999px; overflow: hidden; background: #e9eef5; }
.lesson-feature__progress i { height: 100%; display: block; border-radius: inherit; background: var(--primary); }
.learning-overview { min-height: 94px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 1fr 1fr; }
.progress-stat { padding: 16px 22px; display: flex; align-items: center; gap: 15px; }
.progress-stat + .progress-stat { border-left: 1px solid var(--border); }
.progress-stat strong { font-size: 13px; }
.progress-stat p { margin: 3px 0 0; color: var(--muted); font-size: 11px; }
.progress-ring { --progress: 0; width: 54px; height: 54px; border-radius: 50%; background: conic-gradient(var(--primary) calc(var(--progress) * 1%), #e6edf6 0); display: grid; place-items: center; }
.progress-ring::before { content: ""; width: 44px; height: 44px; border-radius: 50%; background: var(--white); grid-area: 1/1; }
.progress-ring strong { z-index: 1; grid-area: 1/1; font-size: 15px; }
.flame-mark { width: 52px; height: 52px; border-radius: 8px; color: var(--ink-soft); background: transparent; border: 1px solid var(--border); display: grid; place-items: center; }
.task-row { min-height: 78px; border: 0; border-top: 1px solid var(--border); border-radius: 0; padding: 16px 4px; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 14px; }
.task-row:hover { border-color: var(--primary); }
.task-row > span { width: 40px; height: 40px; border-radius: 7px; color: var(--ink-soft); border: 1px solid var(--border); background: var(--white); display: grid; place-items: center; }
.task-row strong { font-size: 13px; }
.task-row p { margin: 3px 0 0; color: var(--muted); font-size: 11px; }
.fee-strip { min-height: 72px; border: 0; border-top: 1px solid var(--border); border-radius: 0; padding: 17px 4px 2px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; }
.fee-strip > span { color: var(--ink-soft); }
.fee-strip strong { font-size: 12px; }
.fee-strip p { margin: 2px 0 0; color: var(--muted); font-size: 11px; }
.fee-strip a { color: var(--primary); display: flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; }
.learning-path-panel { border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.path-list { list-style: none; padding: 2px 0 0; margin: 0; }
.path-item { position: relative; min-height: 68px; padding: 0 0 18px 48px; display: flex; align-items: flex-start; }
.path-item::before { content: ""; position: absolute; top: 29px; bottom: -3px; left: 15px; width: 1px; background: var(--border-strong); }
.path-item:last-child::before { display: none; }
.path-item > span { position: absolute; top: 0; left: 0; z-index: 1; width: 31px; height: 31px; border: 1px solid var(--border-strong); border-radius: 50%; color: var(--muted); background: var(--white); display: grid; place-items: center; font-size: 11px; font-weight: 800; }
.path-item--complete > span { color: var(--white); border-color: var(--success); background: var(--success); }
.path-item--current > span { color: var(--primary); border: 7px solid #dce9ff; background: var(--white); box-shadow: 0 0 0 2px var(--primary); }
.path-item strong { font-size: 13px; }
.path-item p { margin: 2px 0 0; color: var(--muted); font-size: 10px; }
.doubt-summary { min-height: 80px; margin-top: 12px; border-top: 1px solid var(--border); padding-top: 16px; display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 10px; }
.doubt-summary > span { width: 38px; height: 38px; border-radius: 7px; color: var(--ink-soft); background: var(--white); border: 1px solid var(--border); display: grid; place-items: center; }
.doubt-summary strong { font-size: 12px; }
.doubt-summary p { margin: 2px 0 0; color: var(--muted); font-size: 10px; }
.doubt-summary > a { color: var(--primary); }

@media (max-width: 1180px) {
    :root { --sidebar-width: 210px; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-grid { grid-template-columns: 1fr; }
    .admin-rail { grid-template-columns: 1fr 1fr; }
    .live-session { grid-template-columns: minmax(0, 1fr) 260px; }
    .live-session__focus { display: none; }
    .student-grid { grid-template-columns: minmax(0, 1fr) 300px; }
    .student-admin-metrics { grid-template-columns: 1fr 1fr; }
    .student-admin-metrics article:nth-child(3) { border-left: 0; border-top: 1px solid var(--border); }
    .student-admin-metrics article:nth-child(4) { border-top: 1px solid var(--border); }
}

@media (max-width: 920px) {
    :root { --sidebar-width: 242px; }
    .sidebar { transform: translateX(-102%); transition: transform .22s ease; }
    .sidebar-foot { padding-top: 14px; }
    .sidebar-motto { display: none; }
    .mobile-account { display: grid; gap: 12px; }
    .mobile-account__identity { min-width: 0; display: flex; align-items: center; gap: 10px; }
    .mobile-account__avatar { width: 34px; height: 34px; flex: 0 0 34px; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; color: var(--white); background: rgba(255,255,255,.08); display: grid; place-items: center; font-size: 12px; font-weight: 800; }
    .mobile-account__identity > span:last-child { min-width: 0; display: grid; gap: 2px; }
    .mobile-account__identity strong { overflow: hidden; color: var(--white); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
    .mobile-account__identity small { color: #8ea3bf; font-size: 10px; }
    .mobile-logout-button { width: 100%; min-height: 42px; padding: 9px 11px; border: 1px solid rgba(255,255,255,.16); border-radius: 7px; color: #d8e3f1; background: transparent; display: flex; align-items: center; gap: 10px; font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; }
    .mobile-logout-button:hover { color: var(--white); background: rgba(255,255,255,.06); }
    .mobile-logout-button span { color: inherit; font-size: inherit; }
    .sidebar-scrim { position: fixed; inset: 0; z-index: 20; width: 100%; height: 100%; border: 0; background: rgba(6,17,31,.42); }
    .app-shell.sidebar-open .sidebar { transform: translateX(0); }
    .app-shell.sidebar-open .sidebar-scrim { display: block; }
    .app-main { margin-left: 0; }
    .mobile-topbar { height: 68px; padding: 0 18px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; background: var(--white); }
    .mobile-topbar img { width: 145px; }
    .page-content { padding-top: 24px; }
    .student-grid { grid-template-columns: 1fr; }
    .learning-path-panel { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
    .split-page { grid-template-columns: 1fr; }
    .curriculum-layout { grid-template-columns: 1fr; }
    .curriculum-aside { position: static; }
    .class-notes { grid-template-columns: 1fr; }
    .attendance-row { grid-template-columns: 1fr 160px; }
    .attendance-row > .form-field:last-child { grid-column: 1 / -1; }
    .student-admin-layout { grid-template-columns: 1fr; }
    .student-admin-rail { position: static; grid-template-columns: 1fr 1fr; }
    .fee-overview { grid-template-columns: 1fr 1fr; }
    .fee-overview > div:nth-child(3) { border-left: 0; border-top: 1px solid var(--border); }
    .fee-overview > div:nth-child(4) { border-top: 1px solid var(--border); }
}

@media (max-width: 720px) {
    body.is-student { padding-bottom: 76px; }
    .desktop-only { display: none !important; }
    .page-content { padding: 22px 16px 36px; }
    .page-header { min-height: 0; margin-bottom: 20px; }
    .page-header h1 { font-size: clamp(28px, 8vw, 36px); }
    .page-header p { font-size: 13px; }
    .metrics-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .metric { min-height: 88px; padding: 13px; gap: 10px; }
    .metric__icon { width: 38px; height: 38px; }
    .metric strong { font-size: 21px; }
    .admin-rail { grid-template-columns: 1fr; }
    .panel { padding: 15px; }
    .live-session { min-height: 0; padding: 20px; grid-template-columns: 1fr; gap: 18px; }
    .live-session h2 { font-size: 30px; }
    .live-session__action { min-height: 0; padding: 18px 0 0; border-left: 0; border-top: 1px solid var(--border-strong); }
    .student-grid { margin-top: 22px; gap: 22px; }
    .student-primary { gap: 0; padding: 0; border: 0; }
    .lesson-feature { grid-template-columns: 72px minmax(0, 1fr); padding: 14px; gap: 13px; }
    .lesson-feature__icon { width: 72px; min-height: 112px; }
    .lesson-feature__body { padding-bottom: 53px; }
    .lesson-feature__body h3 { font-size: 16px; }
    .lesson-feature__body .button { width: 100%; }
    .lesson-feature__progress { right: 14px; bottom: 14px; left: 99px; grid-template-columns: 1fr auto; }
    .lesson-feature__progress > span { display: none; }
    .learning-overview { gap: 10px; border: 0; }
    .progress-stat { border: 1px solid var(--border); border-radius: 13px; padding: 13px; gap: 10px; }
    .progress-stat + .progress-stat { border-left: 1px solid var(--border); }
    .progress-ring { width: 52px; height: 52px; }
    .progress-ring::before { width: 39px; height: 39px; }
    .flame-mark { width: 48px; height: 48px; }
    .fee-strip { grid-template-columns: auto 1fr; }
    .fee-strip a { grid-column: 2; }
    .learning-path-panel { border-inline: 0; border-radius: 0; padding-inline: 0; }
    .form-section { padding: 18px; grid-template-columns: 1fr; gap: 20px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-field--wide { grid-column: auto; }
    .record-row { grid-template-columns: 42px minmax(0, 1fr) auto; padding: 13px; }
    .record-row dl { display: none; }
    .record-row > .button { grid-column: 2 / -1; justify-self: start; }
    .assignment-brief, .student-assignment > header { grid-template-columns: 1fr; gap: 18px; }
    .assignment-brief dl { border-top: 1px solid var(--border); padding-top: 14px; }
    .submission-content, .submission-empty, .review-form { margin-left: 0; }
    .review-form { grid-template-columns: 1fr; }
    .review-form > div { justify-content: flex-end; }
    .previous-submission { align-items: flex-start; flex-direction: column; }
    .class-summary { grid-template-columns: 1fr; }
    .class-summary .panel + .panel { border-left: 0; border-top: 1px solid var(--border); }
    .attendance-form .section-heading { align-items: flex-start; flex-direction: column; }
    .session-status { width: 100%; }
    .attendance-row { grid-template-columns: 1fr; }
    .attendance-row > .form-field:last-child { grid-column: auto; }
    .inline-fields { grid-template-columns: 1fr; }
    .header-actions { align-items: flex-end; flex-direction: column; }
    .student-admin-rail { grid-template-columns: 1fr; }
    .profile-sheet { grid-template-columns: 1fr; }
    .profile-sheet__avatar { grid-row: auto; margin-bottom: 14px; }
    .profile-sheet__action { grid-column: auto; }
    .mobile-nav { position: fixed; inset: auto 0 0; z-index: 18; height: calc(69px + env(safe-area-inset-bottom)); padding: 6px 8px env(safe-area-inset-bottom); border-top: 1px solid var(--border); background: rgba(255,255,255,.98); display: grid; grid-template-columns: repeat(5, 1fr); box-shadow: 0 -10px 30px rgba(6,17,31,.06); }
    .mobile-nav__link { min-width: 0; border: 0; border-radius: 9px; color: var(--muted); background: transparent; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; font-size: 9px; font-weight: 700; cursor: pointer; }
    .mobile-nav__link.is-active { color: var(--primary); }
    .mobile-nav__link.is-active::after { content: ""; position: absolute; bottom: calc(3px + env(safe-area-inset-bottom)); width: 22px; height: 2px; border-radius: 2px; background: var(--primary); }
}

@media (max-width: 520px) {
    .auth-shell { display: block; }
    .auth-brand-panel { display: none; }
    .auth-form-panel { padding: 34px 20px; }
    .auth-mobile-logo { display: block; }
    .auth-card h2 { font-size: 40px; }
    .metrics-grid { grid-template-columns: 1fr; }
    .metric { min-height: 76px; }
    .learning-overview { grid-template-columns: 1fr 1fr; }
    .progress-stat { align-items: flex-start; flex-direction: column; }
    .progress-stat p { line-height: 1.35; }
    .lesson-feature { grid-template-columns: 58px 1fr; }
    .lesson-feature__icon { width: 58px; }
    .lesson-feature__progress { left: 85px; }
    .task-row { grid-template-columns: 40px 1fr auto; padding-inline: 12px; }
    .fee-overview { grid-template-columns: 1fr; }
    .fee-overview > div + div { border-left: 0; border-top: 1px solid var(--border); }
    .student-admin-metrics { grid-template-columns: 1fr; }
    .student-admin-metrics article + article { border-left: 0; border-top: 1px solid var(--border); }
    .detail-grid { grid-template-columns: 1fr; }
    .detail-grid > div:nth-child(odd) { margin-right: 0; }
    .detail-grid__wide { grid-column: auto; }
}

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