@import"https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500;600&display=swap";:root{--announcement-banner-height: 0px}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{font-family:Geist,system-ui,-apple-system,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow:hidden}#root{height:100%}img,svg{display:block;max-width:100%}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pageIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@keyframes paneIn{0%{opacity:0;transform:translateY(-2px)}to{opacity:1;transform:none}}.pw-login{height:100%;display:grid;grid-template-columns:1fr 1fr;background:var(--bg);overflow:hidden}.pw-login-left{display:flex;flex-direction:column;padding:36px 48px;position:relative;border-right:1px solid var(--line);overflow-y:auto}.pw-login-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}.pw-login-brand-mark{width:24px;height:24px;border-radius:7px;background:var(--blue);position:relative;flex-shrink:0}.pw-login-brand-mark:after{content:"";position:absolute;inset:6px;border-radius:2px;background:var(--bg)}.pw-login-brand-name{font-size:14px;font-weight:600;color:var(--fg);letter-spacing:-.01em}.pw-login-content{margin:auto 0;max-width:460px}.pw-login-eyebrow{font-size:12px;color:var(--blue-hi);font-family:var(--font-mono);margin-bottom:18px}.pw-login-content h1{font-size:44px;font-weight:600;letter-spacing:-.03em;line-height:1.05;margin:0 0 18px;color:var(--fg)}.pw-login-content h1 em{font-style:normal;color:var(--fg-2)}.pw-login-content>p{font-size:15px;line-height:1.6;color:var(--fg-2);max-width:48ch;margin:0 0 32px}.pw-signin-card{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-4);padding:20px;max-width:380px}.pw-signin-card h3{font-size:14px;font-weight:500;margin:0 0 4px;color:var(--fg)}.pw-signin-card p{font-size:13px;color:var(--fg-3);margin:0 0 16px}.pw-google-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:40px;background:#fff;color:#151618;border-radius:var(--r-2);font-weight:500;font-size:13.5px;transition:background .12s;cursor:pointer;border:none}.pw-google-btn:hover{background:#eee}.pw-signin-foot{margin-top:12px;font-size:11.5px;color:var(--fg-3);text-align:center}.pw-login-meta{position:absolute;bottom:36px;left:48px;right:48px;display:flex;justify-content:space-between;font-size:11.5px;color:var(--fg-4);font-family:var(--font-mono);flex-shrink:0}.pw-login-right{background:var(--bg);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:48px}.pw-login-right:before{content:"";position:absolute;inset:0;background-image:linear-gradient(oklch(1 0 0 / .025) 1px,transparent 1px),linear-gradient(90deg,oklch(1 0 0 / .025) 1px,transparent 1px);background-size:40px 40px;-webkit-mask-image:radial-gradient(ellipse 70% 70% at center,black 30%,transparent 80%);mask-image:radial-gradient(ellipse 70% 70% at center,black 30%,transparent 80%)}.pw-preview-stack{display:flex;flex-direction:column;gap:10px;width:420px;max-width:100%;position:relative}.pw-preview-card{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-4);padding:14px 16px;display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;box-shadow:var(--shadow-2);animation:previewIn .5s var(--ease) both}.pw-preview-card:nth-child(1){animation-delay:0ms}.pw-preview-card:nth-child(2){animation-delay:80ms}.pw-preview-card:nth-child(3){animation-delay:.16s}.pw-preview-card:nth-child(4){animation-delay:.24s}@keyframes previewIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.pw-preview-row{display:flex;align-items:center;gap:10px;min-width:0;margin-bottom:2px}.pw-preview-code{font-family:var(--font-mono);font-size:11px;color:var(--blue-hi);background:var(--blue-tint);padding:2px 6px;border-radius:4px;white-space:nowrap}.pw-preview-title{font-size:13px;font-weight:500;color:var(--fg-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.pw-preview-meta{font-size:11px;color:var(--fg-3);font-family:var(--font-mono)}.pw-preview-seats{font-family:var(--font-mono);font-size:13px;font-weight:500;display:flex;align-items:center;gap:4px;white-space:nowrap}.pw-preview-seats.green{color:var(--green)}.pw-preview-seats.amber{color:var(--amber)}.pw-preview-seats.red{color:var(--red)}@media (max-width: 960px){.pw-login{grid-template-columns:1fr;overflow-y:auto}.pw-login-left{border-right:none;padding:32px 28px 80px}.pw-login-right{display:none}.pw-login-meta{position:static;margin-top:32px}.pw-login-content h1{font-size:32px}}.tutorial-overlay{position:fixed;inset:0;background:#0006;z-index:9998;pointer-events:none}.tutorial-spotlight{position:fixed;z-index:9999;pointer-events:none;border:4px solid #1f5fc3;border-radius:8px;box-shadow:0 0 0 9999px #00000080,0 0 30px #1f5fc3cc,inset 0 0 0 2px #ffffff4d;transition:all .3s ease-in-out;background:#ffffff05}.tutorial-tooltip{position:fixed;z-index:10000;background:var(--card-bg, #ffffff);color:var(--text-primary, #1a1a1a);border-radius:12px;padding:24px;max-width:400px;box-shadow:0 8px 32px #0003;pointer-events:auto}.tutorial-tooltip-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.tutorial-step-counter{font-size:13px;font-weight:600;color:#1f5fc3;text-transform:uppercase;letter-spacing:.5px}.tutorial-close-btn{background:none;border:none;color:var(--text-secondary, 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.tutorial-btn-next,[data-theme=dark] .tutorial-btn-finish{background:#4a8fe7;color:#fff}[data-theme=dark] .tutorial-btn-next:hover,[data-theme=dark] .tutorial-btn-finish:hover{background:#3a7fd7}.tutorial-tooltip:before{content:"";position:absolute;width:0;height:0;border:10px solid transparent}.tutorial-tooltip[data-position=bottom]:before{top:-20px;left:50%;transform:translate(-50%);border-bottom-color:var(--card-bg, #ffffff)}.tutorial-tooltip[data-position=top]:before{bottom:-20px;left:50%;transform:translate(-50%);border-top-color:var(--card-bg, #ffffff)}.tutorial-tooltip[data-position=left]:before{right:-20px;top:50%;transform:translateY(-50%);border-left-color:var(--card-bg, #ffffff)}.tutorial-tooltip[data-position=right]:before{left:-20px;top:50%;transform:translateY(-50%);border-right-color:var(--card-bg, #ffffff)}[data-theme=dark] .tutorial-tooltip:before{border-bottom-color:var(--card-bg, #2a2a2a);border-top-color:var(--card-bg, #2a2a2a);border-left-color:var(--card-bg, 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768px){.email-composer-overlay{padding:12px}.composer-header,.recipient-info,.email-templates,.email-form{padding:20px}.form-actions{flex-direction:column}.cancel-btn,.send-btn{width:100%;justify-content:center}}.announcement-manager{padding:24px}.announcement-manager__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.announcement-manager__header h2{display:flex;align-items:center;gap:12px;margin:0;font-size:24px;color:var(--color-heading)}.announcement-manager__header h2 svg{width:28px;height:28px}.announcement-manager__loading{text-align:center;padding:48px;color:var(--color-text-muted)}.announcement-manager__error{display:flex;align-items:center;gap:12px;padding:16px 20px;margin-bottom:24px;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;color:#991b1b}.announcement-manager__error svg{width:20px;height:20px;flex-shrink:0}.announcement-manager__error span{flex:1;font-size:14px}.announcement-manager__error 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h3{margin:0;font-size:18px;font-weight:600;color:var(--color-heading)}.modal-close{background:none;border:none;padding:4px;cursor:pointer;color:var(--color-text-muted);display:flex;align-items:center;justify-content:center;transition:color .2s}.modal-close:hover{color:var(--color-heading)}.modal-close svg{width:20px;height:20px}.modal-body{padding:24px}.modal-body p{margin:0;color:var(--color-text);line-height:1.6}.modal-footer{display:flex;justify-content:flex-end;gap:12px;padding:16px 24px;border-top:1px solid var(--color-border)}.admin-stats{display:flex;flex-direction:column;gap:24px}.stats-header{display:flex;align-items:center;gap:12px}.stats-header-icon{color:var(--color-primary-600)}.stats-title{margin:0;font-size:1.25rem;font-weight:600;color:var(--color-heading)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}.stat-card{--tone-color: var(--color-primary-600);--tone-surface: rgba(0, 57, 166, 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var(--color-success);--tone-surface: rgba(29, 129, 76, .12)}.tone-warning{--tone-color: var(--color-warning);--tone-surface: rgba(179, 107, 9, .12)}.tone-accent{--tone-color: var(--color-primary-500);--tone-surface: rgba(31, 95, 195, .12)}@media (max-width: 768px){.stats-grid{gap:16px}.stat-card{padding:16px}}.admin-panel{max-width:1180px;margin:0 auto;padding:36px 32px 80px;display:flex;flex-direction:column;gap:24px;animation:pageIn .28s var(--ease)}.admin-panel.loading,.admin-panel.unauthorized{min-height:calc(100vh - 120px);display:flex;align-items:center;justify-content:center;padding:12px}.admin-panel .loading-spinner{text-align:center;color:var(--color-text-muted);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:32px 36px;min-width:280px}.admin-panel .loading-spinner p{margin:0;font-size:.95rem}.admin-panel .spinner{width:42px;height:42px;margin:0 auto 18px;border-radius:50%;border:3px solid 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var(--transition-base)}.btn-primary:hover:not(:disabled){background:var(--color-primary-700)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.schedule-modal-overlay{position:fixed;inset:0;background:#11182773;display:flex;align-items:center;justify-content:center;z-index:1200;animation:fadeIn .2s ease forwards}.schedule-modal{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:min(720px,92vw);max-height:90vh;box-shadow:0 24px 48px #0f172a38;display:flex;flex-direction:column;animation:slideUp .2s ease forwards}.schedule-modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--color-border)}.schedule-modal-title{margin:0;font-size:1.25rem;font-weight:700;color:var(--color-heading)}.modal-close-btn{border:none;background:none;color:var(--color-text-muted);cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:color 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var(--color-border);border-radius:var(--radius-md);padding:16px;background:var(--color-surface-muted)}.form-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.form-field{display:flex;flex-direction:column;gap:6px}.form-label{font-size:.8rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.form-field select,.form-field input{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);font-size:.95rem;color:var(--color-text);transition:border-color var(--transition-base)}.form-field select:focus,.form-field input:focus{outline:none;border-color:var(--color-primary-500);box-shadow:0 0 0 3px #1f5fc326}.modal-actions-row{display:flex;justify-content:flex-end}.modal-action-btn{padding:10px 18px;border-radius:var(--radius-sm);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-heading);font-weight:600;cursor:pointer;transition:all var(--transition-base);min-width:96px}.modal-action-btn.primary{background:var(--color-primary-600);color:#fff;border-color:var(--color-primary-600)}.modal-action-btn.primary:hover:not(:disabled){background:var(--color-primary-700);border-color:var(--color-primary-700)}.modal-action-btn:hover:not(:disabled){background:var(--color-surface-muted);border-color:var(--color-primary-400);color:var(--color-primary-600)}.modal-action-btn:disabled{opacity:.55;cursor:not-allowed}.modal-loading,.modal-empty,.modal-error{border:1px dashed var(--color-border);border-radius:var(--radius-md);padding:24px;font-size:.95rem;text-align:center;color:var(--color-text-muted)}.modal-error{border-style:solid;border-color:#c7292959;color:var(--color-danger, #b42318);background:#c7292914}.modal-link{margin-top:12px;padding:8px 14px;border-radius:var(--radius-sm);border:1px solid 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var(--color-border);display:flex;align-items:center;justify-content:center;grid-row:1;background:var(--color-surface-muted)}.time-slot-label{height:80px;display:flex;align-items:flex-start;justify-content:center;padding-top:8px;font-size:.75rem;font-weight:600;color:var(--color-text-muted);border-bottom:1px solid var(--color-border)}.time-slot-label:last-child{border-bottom:1px solid var(--color-border)}.day-column{border-right:1px solid var(--color-border);display:grid;grid-template-rows:50px repeat(13,80px);gap:0;background:var(--color-surface)}.day-column:last-child{border-right:none}.day-header{height:50px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:var(--color-heading);border-bottom:2px solid var(--color-border);border-right:1px solid var(--color-border);background:var(--color-surface-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.day-column:last-child .day-header{border-right:none}.day-slots{display:contents}.time-slot{height:80px;border-bottom:1px solid var(--color-border);border-right:1px solid var(--color-border);position:relative;padding:4px;display:flex;flex-direction:column;background:var(--color-surface)}.day-column:last-child .time-slot{border-right:none}.time-slot:last-child{border-bottom:none}.class-block{position:relative;background:var(--color-primary-100);border:2px solid var(--color-primary-400);border-radius:var(--radius-sm);padding:8px;margin:2px;cursor:pointer;transition:all var(--transition-base);height:calc(100% - 4px);overflow:hidden;outline:none}.class-block:hover{background:var(--color-primary-200);border-color:var(--color-primary-500);transform:scale(1.02);z-index:10;box-shadow:var(--shadow-md)}.class-block:focus{border-color:var(--color-primary-600);box-shadow:0 0 0 3px #1f5fc333}.class-block:active{transform:scale(.98)}.class-block-content{display:flex;flex-direction:column;gap:4px;height:100%}.class-code{font-weight:700;font-size:.85rem;color:var(--fg);line-height:1.2}.class-time{font-size:.7rem;color:var(--fg-1);font-weight:600}.class-location{font-size:.7rem;color:var(--fg-2)}.remove-class-btn{position:absolute;top:4px;right:4px;width:20px;height:20px;border-radius:50%;background:var(--color-danger);color:#fff;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transition:opacity var(--transition-base)}.class-block:hover .remove-class-btn{opacity:1}.remove-class-btn:hover{background:#b71c1c}.empty-schedule{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;padding:40px;max-width:400px;pointer-events:none;display:flex;flex-direction:column;align-items:center;justify-content:center}.empty-schedule svg{color:var(--color-text-muted);opacity:.3;margin-bottom:16px;display:block}.empty-schedule h3{margin:0 0 8px;font-size:1.25rem;color:var(--color-heading)}.empty-schedule p{margin:0 0 20px;color:var(--color-text-muted);font-size:.95rem;line-height:1.5}.empty-schedule .btn-secondary{pointer-events:all}.empty-schedule .btn-secondary svg{flex-shrink:0;opacity:1;color:currentColor;vertical-align:middle;margin-top:0;margin-bottom:0}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);font-weight:600;font-size:.95rem;cursor:pointer;transition:all var(--transition-base);pointer-events:all}.btn-secondary:hover{background:var(--color-surface-muted);border-color:var(--color-primary-400);color:var(--color-primary-600)}.class-detail-modal-overlay{position:fixed;inset:0;background:#11182780;display:flex;align-items:center;justify-content:center;z-index:1300;animation:fadeIn .2s ease forwards}.class-detail-modal{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:min(480px,92vw);max-height:85vh;overflow-y:auto;box-shadow:0 24px 48px #0f172a38;animation:slideUp .2s ease forwards}.class-detail-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--color-border);background:var(--color-surface-muted)}.class-detail-title{margin:0;font-size:1.5rem;font-weight:700;color:var(--color-heading)}.class-detail-close{border:none;background:none;color:var(--color-text-muted);cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:all var(--transition-base);display:flex;align-items:center;justify-content:center}.class-detail-close:hover{color:var(--color-primary-600);background:var(--color-surface)}.class-detail-body{padding:24px;display:flex;flex-direction:column;gap:16px}.class-detail-section{display:flex;flex-direction:column;gap:6px}.class-detail-label{font-size:.75rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.class-detail-value{font-size:1rem;color:var(--color-heading);font-weight:500}.class-detail-footer{padding:16px 24px;border-top:1px solid var(--color-border);background:var(--color-surface-muted)}.class-detail-remove-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;background:var(--color-danger, #dc2626);color:#fff;border:none;border-radius:var(--radius-sm);font-weight:600;font-size:.95rem;cursor:pointer;transition:all var(--transition-base)}.class-detail-remove-btn:hover{background:var(--color-danger-dark, #b91c1c)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 1200px){.calendar-grid{grid-template-columns:70px repeat(5,1fr)}.time-slot-label{font-size:.7rem}.class-code{font-size:.75rem}.class-time,.class-location{font-size:.65rem}}@media (max-width: 900px){.schedule-builder{padding:24px 16px}.header-content{flex-direction:column;align-items:stretch}.header-actions{width:100%;justify-content:space-between}.calendar-grid{grid-template-columns:60px 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900px){.pw-layout{grid-template-columns:1fr}.pw-sidebar-backdrop.visible{display:block}}:root{--bg: oklch(.185 .012 255);--bg-1: oklch(.205 .013 255);--bg-2: oklch(.225 .014 255);--bg-3: oklch(.255 .016 255);--bg-hover: oklch(.235 .014 255);--line: oklch(.3 .014 255 / .5);--line-strong: oklch(.36 .016 255 / .7);--line-faint: oklch(1 0 0 / .04);--fg: oklch(.97 .005 255);--fg-1: oklch(.86 .008 255);--fg-2: oklch(.66 .012 255);--fg-3: oklch(.52 .015 255);--fg-4: oklch(.4 .015 255);--blue: oklch(.66 .16 252);--blue-hi: oklch(.78 .13 252);--blue-lo: oklch(.52 .18 252);--blue-tint: oklch(.66 .16 252 / .12);--blue-line: oklch(.66 .16 252 / .3);--green: oklch(.74 .14 158);--green-tint: oklch(.74 .14 158 / .1);--amber: oklch(.78 .13 75);--amber-tint: oklch(.78 .13 75 / .1);--red: oklch(.66 .18 22);--red-tint: oklch(.66 .18 22 / .1);--r-1: 6px;--r-2: 8px;--r-3: 10px;--r-4: 12px;--r-5: 16px;--shadow-1: 0 1px 2px oklch(0 0 0 / .3);--shadow-2: 0 4px 16px -4px oklch(0 0 0 / .4);--shadow-3: 0 16px 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