:root{--bg:#F7F7F9;--surface:#FFFFFF;--surface-hover:#EDEEF1;--primary:#294060;--primary-hover:#1E3050;--primary-light:rgba(41,64,96,0.08);--text-primary:#294060;--text-secondary:#A1AFB8;--text-tertiary:#C4CDD4;--accent:#ED7006;--accent-hover:#D4620A;--accent-light:rgba(237,112,6,0.08);--accent-soft:rgba(237,112,6,0.12);--neutral:#A1AFB8;--neutral-light:rgba(161,175,184,0.15);--warning:#F59E0B;--warning-light:rgba(245,158,11,0.08);--divider:rgba(41,64,96,0.08);--danger:#EF4444;--danger-light:rgba(239,68,68,0.08);--premium-slate-50:#F7F7F9;--premium-slate-100:#EDEEF1;--premium-slate-200:rgba(41,64,96,0.08);--premium-slate-300:#A1AFB8;--premium-slate-700:#A1AFB8;--premium-slate-800:#294060;--premium-slate-900:#294060;--premium-cyan-400:#294060;--premium-cyan-500:#ED7006;--premium-cyan-600:#D4620A;--premium-cyan-700:#B85408;--premium-coral-400:#EF4444;--premium-coral-500:#DC2626;--premium-coral-600:#B91C1C;--premium-bg-primary:var(--surface);--premium-bg-secondary:var(--bg);--premium-bg-tertiary:var(--surface-hover);--premium-text-primary:var(--text-primary);--premium-text-secondary:var(--text-secondary);--premium-text-muted:var(--text-tertiary);--premium-accent-primary:var(--accent);--premium-accent-secondary:var(--primary);--premium-shadow-xs:0 1px 3px rgba(0,0,0,0.04);--premium-shadow-sm:0 2px 8px rgba(0,0,0,0.05);--premium-shadow-default:0 4px 24px rgba(0,0,0,0.06);--premium-shadow-lg:0 8px 32px rgba(0,0,0,0.08);--premium-shadow-xl:0 12px 48px rgba(0,0,0,0.10);--premium-shadow-glow-accent:0 4px 16px rgba(237,112,6,0.28);--premium-shadow-glow-primary:0 4px 16px rgba(41,64,96,0.20);--premium-shadow-glow-cyan:var(--premium-shadow-glow-accent);--premium-shadow-glow-coral:0 4px 16px rgba(239,68,68,0.25);--premium-radius-sm:10px;--premium-radius-default:12px;--premium-radius-lg:16px;--premium-radius-xl:20px;--premium-radius-full:9999px;--premium-font-primary:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",sans-serif}body{font-family:var(--premium-font-primary);background:var(--bg);position:relative}body:before{display:none}.login-container{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none;padding:48px;border-radius:var(--premium-radius-lg);box-shadow:var(--premium-shadow-default);border:none;animation:premiumFadeIn .5s ease}@keyframes premiumFadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.welcome-heading{font-size:28px;font-weight:700;color:var(--primary);letter-spacing:-.03em;background:none;-webkit-background-clip:unset;background-clip:unset;-webkit-text-fill-color:var(--primary)}.subtitle{color:var(--text-secondary);font-weight:500}.email-input,.form-group input,.form-group select,.form-group textarea{padding:14px 16px;background:var(--bg);border:1.5px solid transparent;border-radius:var(--premium-radius-sm);font-size:15px;font-weight:500;color:var(--text-primary);transition:all .2s ease;box-shadow:0 1px 3px rgba(0,0,0,.04)}.email-input:focus,.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--surface)}.email-input::placeholder,.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-tertiary);font-weight:400}.continue-button{background:var(--primary);color:white;padding:14px 24px;border:none;border-radius:12px;font-size:16px;font-weight:600;letter-spacing:-.01em;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease;box-shadow:none;position:relative;overflow:hidden}.continue-button:before{display:none}.continue-button:hover:not(:disabled){background:var(--primary-hover);opacity:1;transform:none;box-shadow:var(--premium-shadow-glow-primary)}.continue-button:active:not(:disabled){transform:scale(.97);box-shadow:none}.continue-button:disabled{background:var(--text-tertiary);color:rgba(255,255,255,.7);cursor:not-allowed;opacity:.6;box-shadow:none}.continue-button:disabled:before{display:none}.social-button{padding:12px 16px;background:var(--primary);color:white;border:none;border-radius:12px;font-weight:600;transition:all .2s ease;box-shadow:none;position:relative;overflow:hidden}.social-button:before{display:none}.social-button:hover{background:var(--primary-hover);opacity:1;transform:none;box-shadow:var(--premium-shadow-glow-primary)}.social-button:hover:before{display:none}.social-button:active{transform:scale(.97);box-shadow:none}.social-button:disabled{background:var(--text-tertiary);color:rgba(255,255,255,.7);cursor:not-allowed;opacity:.6;box-shadow:none}.social-button:disabled:before{display:none}.modal-overlay{background-color:rgba(17,24,39,.5);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);animation:modalOverlayFadeIn .2s ease}@keyframes modalOverlayFadeIn{0%{opacity:0}to{opacity:1}}.modal-content,.modal-content.feedback-modal,.modal-content.policy-modal{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none;border-radius:var(--premium-radius-lg);padding:32px;box-shadow:var(--premium-shadow-lg);border:none;animation:modalContentAppear .3s ease;max-width:540px;width:90%}@keyframes modalContentAppear{0%{opacity:0;transform:scale(.97) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}.feedback-modal .modal-header,.modal-header,.policy-modal .modal-header{border-bottom:1px solid var(--divider);padding-bottom:16px;margin-bottom:24px}.modal-header h2,.modal-title,.policy-modal .modal-header h2{font-size:22px;font-weight:700;color:var(--text-primary);letter-spacing:-.02em;line-height:1.2}.modal-close-button{color:var(--text-secondary);transition:all .2s ease;border-radius:var(--premium-radius-sm);padding:4px 8px}.modal-close-button:hover{color:var(--text-primary);background:var(--surface-hover);transform:none}.feedback-modal .modal-body,.modal-body{color:var(--text-primary);font-size:15px;line-height:1.6;font-weight:400}.feedback-modal .modal-footer,.modal-footer,.modal-footer.policy-footer{border-top:1px solid var(--divider);padding-top:20px;margin-top:24px}.modal-button,.modal-button-cancel,.modal-button-confirm,.modal-button-danger{padding:12px 24px;border-radius:var(--premium-radius-default);font-size:15px;font-weight:600;letter-spacing:-.01em;transition:all .2s ease;box-shadow:none}.modal-button-confirm{background:var(--accent);border-color:var(--accent);color:white}.modal-button-confirm:hover{background:var(--accent-hover);transform:none;box-shadow:0 4px 16px rgba(239,107,63,.25)}.modal-button-cancel{background:var(--surface)}.modal-button-cancel,.modal-button-cancel:hover{color:var(--text-primary);border-color:var(--divider)}.modal-button-cancel:hover{background:var(--surface-hover)}.modal-button-danger{background:var(--danger);border-color:var(--danger);color:white}.modal-button-danger:hover{transform:none;box-shadow:0 4px 16px rgba(239,68,68,.25)}.feedback-message{padding:14px 18px;border-radius:var(--premium-radius-sm);font-size:14px;font-weight:500;border-left:3px solid;backdrop-filter:none;-webkit-backdrop-filter:none}.feedback-message.success{background:var(--teal-light);color:#0D7367;border-color:var(--teal)}.feedback-message.error{background:var(--danger-light);color:#B91C1C;border-color:var(--danger)}.form-label{font-size:14px;font-weight:600;color:var(--text-secondary);margin-bottom:8px;letter-spacing:-.01em}.form-error-message{color:var(--danger);font-size:13px;font-weight:500;margin-top:6px}.action-button,.action-button-secondary,.feedback-modal .modal-footer .action-button-secondary{padding:12px 24px;background:transparent;color:var(--text-primary);border:1px solid var(--divider);border-radius:var(--premium-radius-default);font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:none}.action-button-secondary:hover,.action-button:hover,.feedback-modal .modal-footer .action-button-secondary:hover{background:var(--surface-hover);border-color:var(--divider);color:var(--text-primary);transform:none;box-shadow:none}.action-button.manage-teachers-btn,.manage-button,.manage-teachers-btn{background:var(--primary);color:white;padding:12px 20px;border:none;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .2s ease;box-shadow:none;position:relative;overflow:hidden}.action-button.manage-teachers-btn:before,.manage-button:before,.manage-teachers-btn:before{display:none}.action-button.manage-teachers-btn:hover:not(:disabled),.manage-button:hover:not(:disabled),.manage-teachers-btn:hover:not(:disabled){background:var(--primary-hover);opacity:1;transform:none;box-shadow:0 4px 16px rgba(41,64,96,.22)}.action-button.manage-teachers-btn:hover:not(:disabled):before,.manage-button:hover:not(:disabled):before,.manage-teachers-btn:hover:not(:disabled):before{display:none}.action-button.manage-teachers-btn:active:not(:disabled),.manage-button:active:not(:disabled),.manage-teachers-btn:active:not(:disabled){transform:scale(.97);box-shadow:none}.action-button.manage-teachers-btn:disabled,.manage-button:disabled,.manage-teachers-btn:disabled{background:var(--text-tertiary);color:rgba(255,255,255,.7);cursor:not-allowed;opacity:.6;box-shadow:none}.action-button.manage-teachers-btn:disabled:before,.manage-button:disabled:before,.manage-teachers-btn:disabled:before{display:none}.manage-button svg,.manage-teachers-btn svg{width:18px;height:18px}.save-button,.save-changes-button{padding:14px 32px;background:var(--accent);color:white;border:none;border-radius:var(--premium-radius-default);font-size:16px;font-weight:600;letter-spacing:-.01em;cursor:pointer;transition:all .2s ease;box-shadow:none;position:relative;overflow:hidden}.save-button:before,.save-changes-button:before{display:none}.save-button:hover,.save-changes-button:hover{background:var(--accent-hover);transform:none;box-shadow:0 4px 16px rgba(239,107,63,.25)}.save-button:disabled,.save-changes-button:disabled{background:var(--surface-hover);color:var(--text-tertiary);cursor:not-allowed;transform:none;box-shadow:none}.toggle-mode-button{padding:10px 20px;background:transparent;border:1px solid var(--divider);border-radius:var(--premium-radius-default);font-weight:500;transition:all .2s ease;box-shadow:none}.toggle-mode-button:hover{background:var(--surface-hover);border-color:var(--divider);transform:none;box-shadow:none}.app-item,.course-item{background:var(--surface);border-radius:var(--premium-radius-lg);transition:all .2s ease;box-shadow:var(--premium-shadow-default);transform:translateY(0);cursor:pointer;text-align:left;width:100%;border:none}.app-item:hover,.course-item:hover{border-color:transparent;box-shadow:var(--premium-shadow-lg);transform:translateY(-2px);background:var(--surface)}.app-icon-initial,.course-icon-initial{background:var(--accent);box-shadow:none}.app-name,.course-name{color:var(--text-primary);font-weight:600;letter-spacing:-.01em}.app-type,.course-description{color:var(--text-secondary)}.app-open-chip{margin-left:auto;padding:4px 14px;border-radius:999px;background:var(--accent-light);color:var(--accent);font-size:12px;font-weight:600;letter-spacing:-.01em;text-transform:uppercase}.app-item:focus-visible,.course-item:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app-open-button{margin-left:auto;padding:5px 16px;border-radius:999px;border:none;background:var(--accent);color:white;font-weight:600;font-size:13px;letter-spacing:-.01em;cursor:pointer;transition:all .2s ease;box-shadow:none}.app-open-button:hover{background:var(--accent-hover);transform:none;box-shadow:0 4px 16px rgba(239,107,63,.25)}.app-checkbox-icon.checked{color:var(--teal);filter:none}.app-checkbox-icon.unchecked{color:var(--text-tertiary);transition:all .2s ease}.app-checkbox-button:hover .app-checkbox-icon.unchecked{color:var(--text-secondary)}.toggle-switch-slider{background-color:var(--surface-hover);box-shadow:inset 0 1px 2px rgba(0,0,0,.06)}.toggle-switch-slider:before{box-shadow:var(--premium-shadow-sm)}.toggle-switch-checkbox:checked+.toggle-switch-slider{background:var(--teal);box-shadow:none}.toggle-switch-checkbox:focus+.toggle-switch-slider{box-shadow:0 0 0 3px var(--teal-light)}.or-separator{color:var(--text-tertiary);font-weight:500}.or-separator .line{background-color:var(--divider)}.configure-course-page-container,.configure-page-container,.create-course-page-container{padding:32px 24px;background:transparent;animation:premiumFadeIn .5s ease}.page-header{padding:20px clamp(16px,3vw,32px);margin-bottom:28px;border-bottom:1px solid var(--divider)}.page-header .page-title,.page-title{font-size:24px;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.configure-content-area{gap:20px}.config-card{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none;border:none;border-radius:var(--premium-radius-lg);padding:24px;box-shadow:var(--premium-shadow-default);transition:all .2s ease}.config-card:hover{box-shadow:var(--premium-shadow-lg);border-color:transparent}.card-title{font-size:18px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em;border-bottom:1px solid var(--divider)}.details-card .form-input,.details-card .form-textarea,.form-input,.form-textarea{padding:12px 16px;background:var(--bg);border:1.5px solid transparent;border-radius:var(--premium-radius-sm);font-size:15px;font-weight:500;color:var(--text-primary);transition:all .2s ease;box-shadow:0 1px 3px rgba(0,0,0,.04)}.configure-content-area .details-card .form-textarea{min-height:80px;max-height:260px;overflow-y:auto}.details-card .form-input:focus,.details-card .form-textarea:focus,.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);background:var(--surface)}.details-card .form-label{color:var(--text-secondary);font-weight:600;letter-spacing:-.01em}.back-button{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0;background:transparent;border:1px solid transparent;border-radius:var(--premium-radius-sm);box-shadow:none;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.back-arrow-icon,.back-button svg{width:20px;height:20px}.back-button:hover{border-color:transparent;color:var(--text-primary)}.back-button:active,.back-button:hover{background:var(--surface-hover)}.back-button:focus-visible{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.app-card,.card,.form-card,.settings-card{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none;border:none;border-radius:var(--premium-radius-lg);padding:24px;box-shadow:var(--premium-shadow-default);transition:all .2s ease}.app-card:hover,.card:hover{transform:translateY(-2px);box-shadow:var(--premium-shadow-lg);border-color:transparent}.app-card-item{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none;border:none;border-radius:var(--premium-radius-lg);box-shadow:var(--premium-shadow-default);transition:all .2s ease;position:relative;overflow:hidden}.app-card-item:before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:var(--accent);opacity:0;transition:opacity .2s ease}.app-card-item:hover{transform:translateY(-2px);box-shadow:var(--premium-shadow-lg);border-color:transparent}.app-card-item:hover:before{opacity:1}.app-card-name{font-weight:600;letter-spacing:-.01em;color:var(--text-primary)}.app-card-launch-icon svg{transition:all .2s ease}.app-card-item:hover .app-card-launch-icon svg{transform:scale(1.1);color:var(--accent)}.active-apps-container{gap:16px}.no-active-apps-message{color:var(--text-tertiary);font-weight:500;padding:48px 24px;border-radius:var(--premium-radius-lg);border:1px dashed var(--divider)}.no-active-apps-message,.student-course-item-clickable{background:var(--surface);backdrop-filter:none;-webkit-backdrop-filter:none}.student-course-item-clickable{border:none;box-shadow:var(--premium-shadow-default);transition:all .2s ease}.student-course-item-clickable:hover{transform:translateY(-2px);box-shadow:var(--premium-shadow-lg);border-color:transparent}.student-dashboard-course-list{gap:16px}.loading-spinner{animation:premiumSpin 1s linear infinite}@keyframes premiumSpin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (max-width:768px){.login-container{padding:32px 24px}.modal-content,.modal-content.feedback-modal,.modal-content.policy-modal{padding:24px;width:95%}.welcome-heading{font-size:24px}}