:root{--color-bg:#edf1f6;--color-surface:#fff;--color-subtle:#f2f5f9;--color-navy:#1b2436;--color-navy-hover:#2a3548;--color-gold:#c99a4b;--color-heading:#1b2436;--color-text:#3a4254;--color-muted:#7a8395;--color-muted-light:#9aa3b2;--color-border:#dce3ec;--color-border-strong:#c3cdda;--color-error:#b91c1c;--color-success:#047857;--font-sans:Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-serif:Fraunces, Georgia, "Times New Roman", serif;--radius-sm:8px;--radius-md:12px}*{box-sizing:border-box}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);margin:0}#root{min-height:100vh}h1,h2,h3{font-family:var(--font-serif);color:var(--color-heading);font-weight:600}.auth-layout{place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);flex-direction:column;gap:16px;width:100%;max-width:420px;padding:24px;display:flex;box-shadow:0 4px 16px #1b24360f}.auth-card h1{margin:0 0 8px}.auth-card p{color:var(--color-muted);margin:0}.auth-form{flex-direction:column;gap:8px;display:flex}.auth-form label{color:var(--color-heading);font-size:14px;font-weight:600}.auth-form input{border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);width:100%;color:var(--color-text);padding:10px 12px;font-size:14px}.auth-form input:focus{border-color:var(--color-gold);outline:none;box-shadow:0 0 0 3px #c99a4b2e}.auth-form button{border-radius:var(--radius-sm);background:var(--color-navy);color:#fff;cursor:pointer;border:0;padding:10px 14px;font-size:14px;transition:background .15s}.auth-form button:hover:not(:disabled){background:var(--color-navy-hover)}.auth-form button:disabled{background:var(--color-muted-light);cursor:not-allowed}.auth-form button.auth-link-button{color:var(--color-navy);background:0 0;padding:4px;font-size:13px;text-decoration:underline}.auth-form button.auth-link-button:hover:not(:disabled){color:var(--color-navy-hover);background:0 0}.auth-form button.auth-link-button:disabled{color:var(--color-muted-light);background:0 0}.error-text{color:var(--color-error);font-size:13px}.success-text{color:var(--color-success);font-size:13px}.admin-shell{min-height:100vh;display:flex}.admin-sidebar{background:var(--color-surface);border-right:1px solid var(--color-border);flex-direction:column;flex-shrink:0;width:240px;display:flex}.admin-sidebar-brand{background:var(--color-navy);padding:22px 20px}.admin-brand-name{font-family:var(--font-serif);color:#fff;font-size:22px;font-weight:700;line-height:26px}.admin-brand-name span{color:var(--color-gold)}.admin-brand-subtitle{color:var(--color-muted-light);letter-spacing:3px;margin-top:6px;font-size:11px}.admin-nav{flex-direction:column;gap:4px;padding:16px 12px;display:flex}.admin-nav-link{border-radius:var(--radius-sm);color:var(--color-text);padding:10px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s;display:block}.admin-nav-link:hover{background:var(--color-subtle);color:var(--color-heading)}.admin-nav-link.active{background:var(--color-navy);color:#fff}.admin-logout{border-radius:var(--radius-sm);background:var(--color-navy);color:#fff;cursor:pointer;border:0;margin:auto 12px 16px;padding:10px 14px;font-size:14px;transition:background .15s}.admin-logout:hover{background:var(--color-navy-hover)}.admin-content{flex:1;padding:24px}.page{max-width:960px}.page-header{margin-bottom:24px}.page-header h1{margin:0 0 4px}.page-header p{color:var(--color-muted);margin:0}.page-placeholder{color:var(--color-muted)}.home-cards{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.home-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);color:inherit;padding:24px;text-decoration:none;transition:box-shadow .15s,border-color .15s,transform .15s;display:block}.home-card:hover{border-color:var(--color-gold);transform:translateY(-2px);box-shadow:0 6px 18px #1b24361a}.home-card h2{color:var(--color-heading);margin:0 0 8px;font-size:18px}.home-card p{color:var(--color-muted);margin:0;font-size:14px}.page--wide{max-width:100%}.page-toolbar{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.page-toolbar-filters{flex-wrap:wrap;gap:8px;display:flex}.ui-button{border-radius:var(--radius-sm);font-family:var(--font-sans);cursor:pointer;border:1px solid #0000;font-weight:600;transition:background .15s,border-color .15s,color .15s}.ui-button:disabled{cursor:not-allowed;opacity:.6}.ui-button--md{padding:10px 16px;font-size:14px}.ui-button--sm{padding:6px 12px;font-size:13px}.ui-button--primary{background:var(--color-navy);color:#fff}.ui-button--primary:hover:not(:disabled){background:var(--color-navy-hover)}.ui-button--secondary{background:var(--color-surface);border-color:var(--color-border-strong);color:var(--color-heading)}.ui-button--secondary:hover:not(:disabled){border-color:var(--color-gold)}.ui-button--danger{background:var(--color-error);color:#fff}.ui-button--danger:hover:not(:disabled){background:#991616}.ui-button--ghost{color:var(--color-text);background:0 0}.ui-button--ghost:hover:not(:disabled){background:var(--color-subtle)}.ui-badge{border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;line-height:1.5;display:inline-block}.ui-badge--neutral{background:var(--color-subtle);color:var(--color-muted)}.ui-badge--gold{color:#8a6a2c;background:#c99a4b29}.ui-badge--success{color:var(--color-success);background:#0478571f}.ui-badge--danger{color:var(--color-error);background:#b91c1c1a}.ui-table-wrapper{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden}.ui-table{border-collapse:collapse;width:100%;font-size:14px}.ui-table thead th{text-align:left;background:var(--color-subtle);color:var(--color-muted);letter-spacing:.4px;text-transform:uppercase;border-bottom:1px solid var(--color-border);padding:12px 16px;font-size:12px;font-weight:600}.ui-table tbody td{border-bottom:1px solid var(--color-border);color:var(--color-text);padding:14px 16px}.ui-table tbody tr:last-child td{border-bottom:0}.ui-table tbody tr:hover{background:var(--color-subtle)}.ui-table-empty{text-align:center;color:var(--color-muted);padding:32px 16px}.ui-table-actions{justify-content:flex-end;gap:8px;display:flex}.ui-modal-overlay{z-index:50;background:#1b243673;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.ui-modal{background:var(--color-surface);border-radius:var(--radius-md);flex-direction:column;width:100%;max-width:460px;max-height:calc(100vh - 48px);display:flex;box-shadow:0 16px 48px #1b24363d}.ui-modal-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.ui-modal-header h2{margin:0;font-size:18px}.ui-modal-close{color:var(--color-muted);cursor:pointer;background:0 0;border:0;font-size:24px;line-height:1}.ui-modal-close:hover{color:var(--color-heading)}.ui-modal-body{padding:24px;overflow-y:auto}.ui-modal-footer{border-top:1px solid var(--color-border);justify-content:flex-end;gap:8px;padding:16px 24px;display:flex}.ui-confirm-message{color:var(--color-text);margin:0}.ui-form{flex-direction:column;gap:16px;display:flex}.ui-form-row{grid-template-columns:1fr 1fr;gap:16px;display:grid}.ui-toggle{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:10px;display:inline-flex}.ui-toggle-input{opacity:0;width:1px;height:1px;position:absolute}.ui-toggle-track{background:var(--color-border-strong);border-radius:999px;flex-shrink:0;width:42px;height:24px;transition:background .15s;position:relative}.ui-toggle-thumb{background:#fff;border-radius:50%;width:20px;height:20px;transition:transform .15s;position:absolute;top:2px;left:2px;box-shadow:0 1px 3px #1b24364d}.ui-toggle-input:checked+.ui-toggle-track{background:var(--color-success)}.ui-toggle-input:checked+.ui-toggle-track .ui-toggle-thumb{transform:translate(18px)}.ui-toggle-input:focus-visible+.ui-toggle-track{box-shadow:0 0 0 3px #c99a4b4d}.ui-toggle-input:disabled+.ui-toggle-track{opacity:.6;cursor:not-allowed}.ui-toggle-label{color:var(--color-text);font-size:14px;font-weight:500}.ui-field{flex-direction:column;gap:6px;display:flex}.ui-field>label,.ui-field-label{color:var(--color-heading);font-size:14px;font-weight:600}.ui-input{border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);width:100%;font-size:14px;font-family:var(--font-sans);color:var(--color-text);background:var(--color-surface);padding:10px 12px}.ui-input:focus{border-color:var(--color-gold);outline:none;box-shadow:0 0 0 3px #c99a4b2e}.ui-richtext{border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-surface);overflow:hidden}.ui-richtext--disabled{background:var(--color-subtle);opacity:.7}.ui-richtext-toolbar{border-bottom:1px solid var(--color-border);background:var(--color-subtle);flex-wrap:wrap;gap:4px;padding:6px;display:flex}.ui-richtext-tool{color:var(--color-text);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;padding:4px 8px;font-size:13px;font-weight:600}.ui-richtext-tool:hover:not(:disabled){background:var(--color-border)}.ui-richtext-tool.is-active{background:var(--color-navy);color:#fff}.ui-richtext-tool:disabled{color:var(--color-muted-light);cursor:not-allowed}.ui-richtext-content .ProseMirror{min-height:180px;max-height:360px;color:var(--color-text);outline:none;padding:10px 12px;font-size:14px;overflow-y:auto}.ui-richtext-content .ProseMirror:focus{outline:none}.ui-richtext-content .ProseMirror p{margin:0 0 8px}.student-multiselect{flex-direction:column;gap:8px;display:flex}.student-multiselect-summary{color:var(--color-muted);font-size:13px}.student-multiselect-chips{flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;display:flex}.student-multiselect-chip{color:var(--color-text);background:var(--color-subtle);border:1px solid var(--color-border);border-radius:999px;align-items:center;gap:6px;padding:3px 4px 3px 10px;font-size:13px;display:inline-flex}.student-multiselect-chip button{width:18px;height:18px;color:var(--color-muted);cursor:pointer;background:0 0;border:none;border-radius:999px;justify-content:center;align-items:center;font-size:14px;line-height:1;display:inline-flex}.student-multiselect-chip button:hover:not(:disabled){color:var(--color-error)}.student-multiselect-chip button:disabled{cursor:not-allowed;opacity:.5}.student-multiselect-list{border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-surface);flex-direction:column;max-height:220px;display:flex;overflow-y:auto}.student-multiselect-empty{color:var(--color-muted);margin:0;padding:12px;font-size:13px}.student-multiselect-option{cursor:pointer;border-bottom:1px solid var(--color-border);grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:8px 12px;font-size:14px;display:grid}.student-multiselect-option:last-child{border-bottom:none}.student-multiselect-option:hover{background:var(--color-subtle)}.student-multiselect-option-name{color:var(--color-text)}.student-multiselect-option-email{color:var(--color-muted);font-size:13px}.back-link{color:var(--color-muted);margin-bottom:8px;font-size:13px;text-decoration:none;display:inline-block}.back-link:hover{color:var(--color-navy)}.chat-conversation-state{color:var(--color-muted);padding:16px 0}.chat-accordion-list{flex-direction:column;gap:12px;display:flex}.chat-accordion{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md)}.chat-accordion--open{border-color:var(--color-border-strong)}.chat-accordion-header{border-radius:var(--radius-md);cursor:pointer;text-align:left;width:100%;color:var(--color-heading);background:0 0;border:none;align-items:center;gap:12px;padding:14px 16px;display:flex}.chat-accordion--open .chat-accordion-header{border-bottom-right-radius:0;border-bottom-left-radius:0}.chat-accordion-header:hover{background:var(--color-subtle)}.chat-accordion-caret{color:var(--color-muted);font-size:11px}.chat-accordion-title{color:var(--color-heading);flex:1;font-weight:600}.chat-accordion-meta{align-items:center;gap:12px;display:flex}.chat-accordion-count,.chat-accordion-date{color:var(--color-muted);font-size:13px}.chat-accordion-body{border-top:1px solid var(--color-border);background:var(--color-bg);border-bottom-left-radius:var(--radius-md);border-bottom-right-radius:var(--radius-md)}.chat-messages{flex-direction:column;gap:16px;padding:20px;display:flex}.chat-message-row{flex-direction:column;gap:8px;max-width:75%;display:flex}.chat-message-row-user{align-self:flex-end;align-items:flex-end}.chat-message-row-assistant{align-self:flex-start;align-items:flex-start}.chat-bubble{border-radius:var(--radius-md);padding:12px 16px}.chat-bubble-user{background:var(--color-navy);color:#fff}.chat-bubble-assistant{background:var(--color-subtle);color:var(--color-text);border:1px solid var(--color-border)}.chat-bubble-content{white-space:pre-wrap;word-wrap:break-word;margin:0}.chat-bubble-time{opacity:.6;margin-top:6px;font-size:11px;display:block}.chat-audio-unavailable{color:var(--color-muted);font-size:12px;font-style:italic}.chat-conversation-toolbar{z-index:2;background:var(--color-bg);border-bottom:1px solid var(--color-border);justify-content:flex-end;padding:12px 20px;display:flex;position:sticky;top:0}.chat-play-all{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-navy);cursor:pointer;border-radius:999px;align-items:center;gap:8px;padding:6px 14px 6px 10px;font-size:13px;font-weight:600;display:inline-flex}.chat-play-all:hover{border-color:var(--color-gold)}.chat-play-all svg{width:16px;height:16px;color:var(--color-gold)}.chat-audio-player{background:var(--color-surface);border:1px solid var(--color-border);border-radius:999px;align-items:center;gap:12px;min-width:220px;max-width:100%;padding:8px 12px;display:flex}.chat-audio-player--active{border-color:var(--color-gold)}.chat-voice-play{background:var(--color-gold);color:#fff;cursor:pointer;border:none;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;padding:0;display:flex}.chat-voice-play svg{width:18px;height:18px}.chat-voice-track{background:var(--color-border);border-radius:999px;flex:1;height:4px;overflow:hidden}.chat-voice-progress{background:var(--color-gold);height:100%}.chat-voice-duration{color:var(--color-muted);text-align:right;min-width:4.5rem;font-size:12px}