.ui-button{cursor:pointer;letter-spacing:-.02em;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;min-height:44px;padding:0 18px;font-weight:800;transition:transform .16s,border-color .16s,background .16s;display:inline-flex}.ui-button:hover:not(:disabled){transform:translateY(-1px)}.ui-button:focus-visible{outline-offset:3px;outline:3px solid #60a5fa6b}.ui-button:disabled{cursor:not-allowed;opacity:.58}.ui-button--primary{color:#fff;background:linear-gradient(135deg, var(--accent), var(--accent-2));box-shadow:0 14px 28px #2563eb3d}.ui-button--secondary{color:var(--accent);border-color:var(--line);background:#fff}.ui-button--ghost{color:var(--muted);background:0 0;border-color:#0000}.ui-button--danger{color:#160303;background:var(--danger)}.ui-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:22px;position:relative;overflow:hidden}.ui-card:before{pointer-events:none;content:"";background:linear-gradient(135deg,#2563eb12,#0000 36%);position:absolute;inset:0}.ui-card>*{position:relative}.ui-card--strong{background:var(--panel-strong)}.ui-input-wrap{color:var(--muted);gap:8px;font-size:.88rem;font-weight:700;display:grid}.ui-input{width:100%;min-height:46px;color:var(--text);border:1px solid var(--line);background:#fff;border-radius:14px;padding:0 14px}.ui-input:focus{border-color:#60a5fab8;outline:3px solid #60a5fa2e}:root{color:#102033;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;--bg:#f8fbff;--panel:#ffffffe6;--panel-strong:#fffffffa;--line:#2563eb24;--text:#102033;--muted:#63758e;--accent:#2563eb;--accent-2:#0ea5e9;--danger:#dc2626;--warning:#d97706;--shadow:0 24px 70px #2563eb21;--radius:22px;background:#f8fbff;font-family:Space Grotesk,Pretendard,ui-sans-serif,system-ui,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at 12% 8%,#2563eb1f,#0000 30%),radial-gradient(circle at 86% 18%,#0ea5e929,#0000 32%),linear-gradient(135deg,#f8fbff 0%,#eef6ff 52%,#fff 100%);min-width:320px;min-height:100vh;margin:0}body:before{z-index:-1;pointer-events:none;content:"";background-image:linear-gradient(#2563eb0b 1px,#0000 1px),linear-gradient(90deg,#2563eb0b 1px,#0000 1px);background-size:42px 42px;position:fixed;inset:0;-webkit-mask-image:linear-gradient(#000000e6,#0000);mask-image:linear-gradient(#000000e6,#0000)}a{color:inherit}button,input,textarea,select{font:inherit}.page-shell{width:min(1680px,100vw - 32px);margin:0 auto;padding:28px 0}.auth-shell{place-items:center;min-height:100vh;padding:32px;display:grid}.eyebrow{color:var(--accent-2);letter-spacing:.18em;text-transform:uppercase;margin:0 0 10px;font-size:.78rem;font-weight:800}.title{letter-spacing:-.08em;margin:0;font-size:clamp(2.2rem,5vw,5.4rem);line-height:.92}.subtitle{max-width:720px;color:var(--muted);margin:18px 0 0;font-size:1.04rem;line-height:1.75}.dashboard-grid{grid-template-columns:minmax(260px,.9fr) minmax(320px,1.1fr) minmax(340px,1fr);align-items:start;gap:18px;margin-top:34px;display:grid}.topbar{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.summary-grid,.admin-grid,.lecture-grid{align-items:start;gap:18px;margin-top:34px;display:grid}.summary-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.admin-grid{grid-template-columns:minmax(280px,.9fr) minmax(340px,1.1fr)}.lecture-grid{grid-template-columns:minmax(280px,.8fr) minmax(320px,1fr) minmax(340px,1fr)}.slide-player-grid{grid-template-columns:minmax(180px,.42fr) minmax(760px,1.85fr) minmax(320px,.72fr);align-items:start;gap:18px;margin-top:24px;display:grid}.slide-canvas{border:1px solid var(--line);background:#f8fbff;border-radius:18px;place-items:center;min-height:72vh;display:grid;overflow:hidden}.slide-canvas img{object-fit:contain;width:100%;max-height:70vh;display:block}.pdf-canvas{background:#fff;width:auto;max-width:100%;height:auto;max-height:78vh;display:block}.ai-output{white-space:pre-wrap;border:1px solid var(--line);background:#f8fbff;border-radius:18px;min-height:180px;padding:16px}.audio-player{gap:10px;display:grid}.audio-player audio{width:100%}.metric{color:var(--accent);letter-spacing:-.08em;margin:8px 0 0;font-size:clamp(2.4rem,5vw,4.8rem)}.select-card{width:100%;color:var(--text);text-align:left;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:16px;gap:6px;padding:14px;display:grid}.select-card[data-selected=true]{background:#2563eb14;border-color:#2563eb61}.session-row{justify-content:space-between;align-items:center;gap:16px;display:flex}.link-button{color:#fff;background:linear-gradient(135deg, var(--accent), var(--accent-2));border-radius:999px;justify-content:center;align-items:center;min-height:42px;padding:0 16px;font-weight:800;text-decoration:none;display:inline-flex;box-shadow:0 14px 28px #2563eb33}.stack{gap:16px;display:grid}.form-grid{gap:14px;display:grid}.muted{color:var(--muted)}.error-text{color:var(--danger)}@media (width<=1080px){.dashboard-grid,.summary-grid,.admin-grid,.lecture-grid,.slide-player-grid{grid-template-columns:1fr}.topbar,.session-row{flex-direction:column;align-items:stretch}}