@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@600;700;800&display=swap');
:root{--ink:#172033;--muted:#667085;--cream:#f5f3ec;--paper:#fff;--green:#1d4ed8;--green-2:#2563eb;--lime:#93c5fd;--line:#dbe2ee;--shadow:0 20px 60px rgba(29,78,216,.13);font-family:"DM Sans",system-ui,sans-serif;color:var(--ink);background:var(--cream)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh}button,input,textarea,select{font:inherit}button,a{tap-highlight-color:transparent}a{color:inherit;text-decoration:none}.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}
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.passage-heading{display:block}.passage-video-title{display:flex;align-items:baseline;gap:5px;flex-wrap:wrap}.passage-video-title i{font-style:normal}.passage-video-title .passage-time{color:var(--muted);font-weight:500;font-variant-numeric:tabular-nums}
.admin-login-shell{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:32px}.admin-login-card{width:min(440px,100%);background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--shadow)}.admin-login-card h1{font-size:32px;margin:9px 0}.admin-login-form{display:grid;gap:9px;margin-top:22px}.admin-login-form label{font-weight:700;font-size:13px}.admin-login-form input{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);padding:11px 12px;outline:0}.admin-login-form input:focus{border-color:#93a8cf;box-shadow:0 0 0 3px rgba(29,78,216,.1)}.admin-login-form button,.logout-button{border:0;border-radius:10px;background:var(--green);color:#fff;padding:10px 15px;font-weight:700;cursor:pointer}.admin-error,.admin-notice{border-radius:10px;padding:12px 14px;margin-top:16px}.admin-error{background:#fff0ee;color:#9f312b}.admin-notice{background:#edf3fc}.admin-notice p{margin:5px 0 0}.usage-shell{width:min(1300px,calc(100% - 48px));margin:0 auto;padding:36px 0 72px}.usage-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.usage-header h1{font-size:38px;margin:7px 0 0}.usage-actions,.period-selector{display:flex;align-items:center;gap:8px}.period-selector{background:var(--paper);border:1px solid var(--line);border-radius:11px;padding:4px}.period-selector a{padding:7px 11px;border-radius:7px;color:var(--muted);font-weight:700;font-size:13px}.period-selector a.active{background:#e5ecf7;color:var(--green)}.logout-button{background:transparent;color:var(--muted);border:1px solid var(--line)}.metric-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;margin-bottom:20px}.metric-grid article,.usage-panel{background:var(--paper);border:1px solid var(--line);border-radius:14px}.metric-grid article{padding:17px}.metric-grid span,.metric-grid b,.metric-grid small{display:block}.metric-grid span{font-size:12px;color:var(--muted)}.metric-grid b{font:800 28px Manrope;margin-top:6px}.metric-grid small{color:var(--muted);font-size:10px;margin-top:4px}.usage-panel{padding:19px;margin-bottom:20px;overflow:hidden}.usage-panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.usage-panel-heading h2{font-size:19px;margin:0}.usage-panel-heading p{font-size:12px;margin:3px 0 0}.usage-two-columns{display:grid;grid-template-columns:1fr 1fr;gap:20px}.usage-panel table{width:100%;border-collapse:collapse;font-size:13px}.usage-panel th,.usage-panel td{text-align:left;border-bottom:1px solid var(--line);padding:9px 8px;vertical-align:top}.usage-panel th{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.06em}.usage-panel td:last-child,.usage-panel th:last-child{text-align:right}.usage-panel tbody tr:last-child td{border-bottom:0}.usage-panel code{font-size:12px}.usage-table-scroll{overflow:auto}.recent-events{min-width:850px}.recent-events td:last-child,.recent-events th:last-child{text-align:left}.recent-events td:first-child{white-space:nowrap}.recent-events small{display:block;color:var(--muted);margin-top:3px;max-width:540px;word-break:break-word}.daily-chart{display:grid;gap:8px}.daily-row{display:grid;grid-template-columns:48px minmax(100px,1fr) 45px 100px;align-items:center;gap:10px;font-size:12px}.daily-row time,.daily-row small{color:var(--muted)}.daily-bar-track{height:9px;border-radius:99px;background:#e8eef8;overflow:hidden}.daily-bar-track i{display:block;height:100%;min-width:2px;border-radius:inherit;background:var(--green)}.usage-empty{margin:0}
html[data-theme="dark"]{--ink:#eef4ff;--muted:#a8b5c9;--cream:#0b1220;--paper:#111c30;--green:#2563eb;--green-2:#60a5fa;--lime:#93c5fd;--line:#2f405d;--shadow:0 20px 60px rgba(0,0,0,.35);background:var(--cream)}html[data-theme="dark"] .site-header{background:rgba(11,18,32,.9);border-bottom-color:rgba(255,255,255,.08)}html[data-theme="dark"] .site-header nav a:hover,html[data-theme="dark"] .site-header nav a.active{background:#1b2b46;color:var(--lime)}html[data-theme="dark"] .theme-toggle{background:#14213a;color:#dce7f5}html[data-theme="dark"] .hero{background:radial-gradient(circle at 84% 35%,rgba(147,197,253,.12),transparent 25%),linear-gradient(145deg,#0b1220,#111d31)}html[data-theme="dark"] .hero-search,html[data-theme="dark"] .suggestions button,html[data-theme="dark"] .bubble,html[data-theme="dark"] .source-card,html[data-theme="dark"] .result-card,html[data-theme="dark"] .chat-composer,html[data-theme="dark"] .filter-bar,html[data-theme="dark"] .topic-card,html[data-theme="dark"] .empty-state,html[data-theme="dark"] .taxonomy-search{background:var(--paper);color:var(--ink)}html[data-theme="dark"] .suggestions button,html[data-theme="dark"] .text-link,html[data-theme="dark"] .section-heading>a,html[data-theme="dark"] .back-link,html[data-theme="dark"] .play,html[data-theme="dark"] .taxonomy-subject>summary{color:var(--green-2)}html[data-theme="dark"] .user-message .avatar{background:#223753;color:var(--lime)}html[data-theme="dark"] .source-index,html[data-theme="dark"] .result-time{background:#1e3352;color:var(--lime)}html[data-theme="dark"] .filter-bar input,html[data-theme="dark"] .filter-bar select{background:#18263e;color:var(--ink)}html[data-theme="dark"] .taxonomy-topic>summary:hover,html[data-theme="dark"] .taxonomy-subtopic>summary:hover,html[data-theme="dark"] .taxonomy-subject>summary:hover{background:#192943}html[data-theme="dark"] .taxonomy-topic[open]>summary{background:#1c3151}html[data-theme="dark"] .taxonomy-subtopic[open]>summary{background:#1a2a45}html[data-theme="dark"] .taxonomy-passage{background:#0e1829;color:var(--ink)}html[data-theme="dark"] .taxonomy-passage:hover{background:#17263e}html[data-theme="dark"] .taxonomy-subject,html[data-theme="dark"] .taxonomy-subjects a{border-bottom-color:#293b59}html[data-theme="dark"] .excerpt{background:#192943}html[data-theme="dark"] .button.secondary{background:#1d3150;color:var(--lime)}html[data-theme="dark"] .answer-meta button{background:var(--paper);color:var(--ink);border-color:var(--line)}html[data-theme="dark"] .taxonomy-search input{color:var(--ink)}html[data-theme="dark"] .taxonomy-search input::placeholder{color:#8999b2}
html[data-theme="dark"] .course-lesson-number{background:#1e3352;color:var(--lime)}html[data-theme="dark"] .course-chapter-link{background:#0e1829;color:var(--ink)}html[data-theme="dark"] .course-chapter-link:hover{background:#17263e}
@media(max-width:900px){.hero{grid-template-columns:1fr;padding-top:55px}.hero-card{display:none}.video-grid,.topic-grid{grid-template-columns:repeat(2,1fr)}.filter-bar{grid-template-columns:1fr 1fr}.search-field{grid-column:1/-1}.catalog-header h1{font-size:42px}}
@media(max-width:760px){.site-context{display:none}}
@media(max-width:1100px){.metric-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:900px){.usage-two-columns{grid-template-columns:1fr}.usage-header{align-items:flex-start;flex-direction:column}.daily-row{grid-template-columns:42px minmax(80px,1fr) 36px}.daily-row small{display:none}}
@media(max-width:600px){.site-header{height:56px}.brand{font-size:15px}.brand-mark{width:30px;height:30px}.site-header nav{gap:3px}.site-header nav a{padding:6px 8px;font-size:13px}.theme-toggle{width:30px;height:30px;margin-left:8px}.theme-icon{width:16px;height:16px}.hero{min-height:auto;padding-block:42px}.hero-search{display:block}.hero-search input{width:100%;padding-block:11px}.hero-search button{width:100%}.hero-actions{align-items:flex-start;flex-direction:column}.video-grid,.topic-grid{grid-template-columns:1fr}.content-section,.catalog-shell{padding:36px 18px}.catalog-shell{min-height:calc(100vh - 56px);padding-top:18px}.section-heading{align-items:flex-start}.taxonomy-heading{align-items:stretch;flex-direction:column}.taxonomy-search{width:100%}.taxonomy-search-status{text-align:left;margin-top:-12px}.chat-intro h1{font-size:34px}.suggestions{justify-content:flex-start}.filter-bar{grid-template-columns:1fr}.search-field{grid-column:auto}.result-card{grid-template-columns:54px 1fr}.result-card>.play{display:none}.source-copy em{display:none}.bubble{max-width:88%}.passage-page{width:calc(100% - 24px);padding-top:14px}.passage-view{padding:14px;border-radius:14px}.passage-heading{grid-template-columns:1fr;gap:10px}.passage-heading h1{font-size:19px}.passage-heading .timestamp{justify-self:start}.admin-login-shell{min-height:calc(100vh - 56px);padding:18px}.admin-login-card{padding:24px}.usage-shell{width:calc(100% - 24px);padding-top:24px}.usage-actions{width:100%;align-items:stretch;flex-direction:column}.period-selector{justify-content:space-between}.period-selector a{flex:1;text-align:center}.logout-button{width:100%}.metric-grid{grid-template-columns:repeat(2,1fr)}.metric-grid article{padding:13px}.metric-grid b{font-size:24px}.usage-panel{padding:13px}}