:root{--ui-bg: #ffffff;--ui-bg-soft: #fafafa;--ui-bg-muted: #f3f4f6;--ui-border: #d1d5db;--ui-border-soft: #e5e7eb;--ui-text: #111827;--ui-text-muted: #6b7280;--ui-brand: #4f46e5;--ui-brand-strong: #3730a3;--ui-brand-soft: #eef2ff;--ui-brand-soft-hover: #e0e7ff;--ui-brand-ring: rgba(79, 70, 229, .18);--ui-success: #15803d;--ui-success-bg: #dcfce7;--ui-success-border: #bbf7d0;--ui-warning: #b45309;--ui-warning-bg: #fef3c7;--ui-danger: #b91c1c;--ui-danger-bg: #fee2e2;--ui-info: #1d4ed8;--ui-info-bg: #dbeafe;--ui-shadow-lg: 0 12px 24px rgba(0, 0, 0, .12);--ui-app-bg: #f9fafb;--ui-topbar-bg: #ffffff;--ui-sidebar-bg: #ffffff;--ui-overlay: rgba(0, 0, 0, .25)}:root[data-theme=dark]{color-scheme:dark;--ui-bg: #111827;--ui-bg-soft: #0f172a;--ui-bg-muted: #1f2937;--ui-border: #374151;--ui-border-soft: #263244;--ui-text: #e5e7eb;--ui-text-muted: #9ca3af;--ui-brand: #93c5fd;--ui-brand-strong: #bfdbfe;--ui-brand-soft: #172554;--ui-brand-soft-hover: #1e3a8a;--ui-brand-ring: rgba(147, 197, 253, .2);--ui-success: #86efac;--ui-success-bg: #052e16;--ui-success-border: #166534;--ui-warning: #fbbf24;--ui-warning-bg: #451a03;--ui-danger: #fca5a5;--ui-danger-bg: #450a0a;--ui-info: #bfdbfe;--ui-info-bg: #172554;--ui-shadow-lg: 0 18px 36px rgba(0, 0, 0, .38);--ui-app-bg: #0b1120;--ui-topbar-bg: #111827;--ui-sidebar-bg: #0f172a;--ui-overlay: rgba(0, 0, 0, .55)}html,body{background:var(--ui-app-bg);color:var(--ui-text)}body{margin:0}.ui-page-card{border:1px solid var(--ui-border-soft);border-radius:10px;padding:16px;background:var(--ui-bg);color:var(--ui-text)}.ui-dashboard-hero{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--ui-border-soft);border-radius:18px;padding:24px;background:radial-gradient(circle at 10% 18%,rgba(34,197,94,.12),transparent 28%),linear-gradient(135deg,var(--ui-bg) 0%,var(--ui-bg-soft) 100%);color:var(--ui-text)}.parent-dashboard-page{padding:24px;display:grid;gap:24px}.parent-hero{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:190px;border:1px solid var(--ui-border-soft);border-radius:28px;padding:32px;color:var(--ui-text);background:radial-gradient(circle at 82% 28%,rgba(79,70,229,.24),transparent 26%),radial-gradient(circle at 12% 18%,rgba(20,184,166,.18),transparent 30%),linear-gradient(135deg,var(--ui-bg) 0%,var(--ui-bg-soft) 100%);box-shadow:var(--ui-shadow-lg)}.parent-hero:after{content:"";position:absolute;right:-80px;bottom:-110px;width:260px;height:260px;border-radius:999px;background:color-mix(in srgb,var(--ui-brand) 18%,transparent)}.parent-hero h1{position:relative;z-index:1;max-width:620px;margin:8px 0 0;font-size:clamp(34px,4vw,56px);line-height:.96;letter-spacing:-.05em}.parent-hero p{position:relative;z-index:1;max-width:680px;margin:16px 0 0;color:var(--ui-text-muted);font-size:16px;line-height:1.6}.parent-hero-actions{position:relative;z-index:1;display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.parent-hero-actions a{text-decoration:none}.parent-metrics-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.parent-metric-card{min-height:118px;border:1px solid var(--ui-border-soft);border-radius:22px;padding:18px;background:var(--ui-bg);color:var(--ui-text);display:flex;flex-direction:column;justify-content:space-between}.parent-metric-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.parent-metric-head i{width:38px;height:38px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;color:var(--ui-brand-strong);background:var(--ui-brand-soft);font-style:normal;flex:0 0 auto}.parent-metric-card span{color:var(--ui-text-muted);font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.06em}.parent-metric-card strong{font-size:34px;line-height:1}.parent-metric-blue{background:radial-gradient(circle at top right,rgba(59,130,246,.22),transparent 40%),var(--ui-bg)}.parent-metric-green{background:radial-gradient(circle at top right,rgba(34,197,94,.24),transparent 40%),var(--ui-bg)}.parent-metric-orange{background:radial-gradient(circle at top right,rgba(249,115,22,.24),transparent 40%),var(--ui-bg)}.parent-metric-violet{background:radial-gradient(circle at top right,rgba(139,92,246,.24),transparent 40%),var(--ui-bg)}.parent-overview-card{border-radius:22px;padding:22px}.parent-payment-card{border-radius:22px;padding:22px;display:block;text-decoration:none;transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease}.parent-payment-card a{text-decoration:none}.parent-payment-card:hover{border-color:var(--ui-brand);box-shadow:0 14px 28px #0f172a14;transform:translateY(-1px)}.parent-payment-summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.parent-payment-next{margin-top:14px;border:1px solid var(--ui-border-soft);border-radius:18px;padding:14px;background:radial-gradient(circle at top right,rgba(14,165,233,.12),transparent 36%),var(--ui-bg-soft);display:flex;justify-content:space-between;gap:14px;align-items:center}.parent-payment-next div{display:grid;gap:4px}.parent-payment-next div>span,.parent-payment-next small{color:var(--ui-text-muted);font-weight:700}.parent-payment-next strong{font-size:24px}.parent-payment-next>span{border-radius:999px;padding:6px 10px;background:var(--ui-warning-bg);color:var(--ui-warning);font-weight:800;white-space:nowrap}.parent-payment-next>span.is-overdue{background:var(--ui-danger-bg);color:var(--ui-danger)}.private-lesson-forms{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.4fr);gap:16px;align-items:start}.private-lesson-forms form{display:grid;gap:12px}.private-lesson-schedule{overflow-x:hidden}.private-lesson-toolbar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;margin-bottom:12px}.private-lesson-week-title{text-align:center}.private-lesson-toolbar-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}.private-lesson-grid{display:grid;grid-template-columns:54px repeat(7,minmax(0,1fr));width:100%;border:1px solid var(--ui-border);border-radius:8px;overflow:hidden}.private-lesson-corner,.private-lesson-day-head,.private-lesson-hour,.private-lesson-cell{border-right:1px solid var(--ui-border-soft);border-bottom:1px solid var(--ui-border-soft)}.private-lesson-corner,.private-lesson-day-head{background:#16dfe0;color:#071318;font-weight:900;padding:6px;font-size:13px}.private-lesson-day-head{display:grid;gap:4px}.private-lesson-day-head span{font-size:10px;font-weight:700}.private-lesson-hour{min-height:34px;padding:6px;color:var(--ui-text-muted);background:var(--ui-bg-soft);font-weight:800;font-size:12px}.private-lesson-cell{min-height:34px;padding:3px;background:var(--ui-bg);display:grid;gap:6px;align-content:start}.private-lesson-block{width:100%;min-height:32px;border:1px solid rgba(15,23,42,.16);border-radius:6px;padding:4px;background:#4ade80;color:#071318;display:grid;gap:2px;text-align:left;cursor:pointer;font:inherit;font-size:11px}.private-lesson-block:hover{transform:translateY(-1px);box-shadow:0 10px 18px #0f172a1f}.private-lesson-block span,.private-lesson-block small{font-weight:700}.private-lesson-block.is-postponed{background:#fde047}.private-lesson-block.is-cancelled{background:#fecaca;color:#7f1d1d}.private-lesson-block.is-completed{background:#bbf7d0;color:#14532d}.private-lesson-homework-alert{border:1px solid var(--ui-info);border-radius:10px;padding:12px;background:var(--ui-info-bg);color:var(--ui-info);font-weight:800}.parent-readonly-pill{display:inline-flex;align-items:center;border:1px solid var(--ui-border-soft);border-radius:999px;padding:8px 12px;color:var(--ui-brand-strong);background:var(--ui-brand-soft);font-weight:800;font-size:13px}.parent-student-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.parent-student-card{border:1px solid var(--ui-border-soft);border-radius:22px;padding:18px;background:linear-gradient(135deg,var(--ui-bg) 0%,var(--ui-bg-soft) 100%);color:var(--ui-text)}.parent-student-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.parent-student-card-head span{color:var(--ui-text-muted);font-weight:800;font-size:12px;text-transform:uppercase;letter-spacing:.06em}.parent-student-card-head h3{margin:8px 0 0;font-size:24px}.parent-avatar{width:52px;height:52px;border-radius:18px;display:grid;place-items:center;color:var(--ui-brand-strong);background:var(--ui-brand-soft);font-weight:900}.parent-student-stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:18px}.parent-small-stat{border:1px solid var(--ui-border-soft);border-radius:16px;padding:12px;background:color-mix(in srgb,var(--ui-bg) 76%,var(--ui-bg-soft) 24%)}.parent-small-stat span{display:block;color:var(--ui-text-muted);font-size:12px;font-weight:700}.parent-small-stat strong{display:block;margin-top:6px;font-size:15px}.parent-student-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.parent-student-actions a{border:1px solid var(--ui-border-soft);border-radius:999px;padding:8px 12px;color:var(--ui-text);background:var(--ui-bg);text-decoration:none;font-weight:800;font-size:13px}.parent-student-actions a:hover{border-color:var(--ui-brand);color:var(--ui-brand-strong);background:var(--ui-brand-soft)}@media (max-width: 980px){.parent-hero{align-items:flex-start;flex-direction:column}.parent-hero-actions{justify-content:flex-start}.parent-metrics-grid,.parent-student-grid,.parent-payment-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.private-lesson-forms,.private-lesson-toolbar{grid-template-columns:1fr}.private-lesson-toolbar-actions{justify-content:flex-start}}@media (max-width: 640px){.parent-dashboard-page{padding:16px}.parent-metrics-grid,.parent-student-grid,.parent-student-stat-row,.parent-payment-summary-grid{grid-template-columns:1fr}.parent-payment-next{align-items:flex-start;flex-direction:column}.private-lesson-forms form div[style]{grid-template-columns:1fr!important}}.ui-empty-card{border:1px solid var(--ui-border-soft);border-radius:10px;padding:20px;background:var(--ui-bg);color:var(--ui-text)}.ui-section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;flex-wrap:wrap;gap:8px}.ui-muted-count{color:var(--ui-text-muted);font-weight:600}.ui-card-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px;flex-wrap:wrap}.ui-inline-info{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.ui-inline-info-label{font-size:13px;color:var(--ui-text-muted);font-weight:500}.ui-inline-info-value{font-size:16px;font-weight:700;color:var(--ui-text)}.ui-student-assignments-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.ui-view-toggle{display:inline-flex;align-items:center;gap:6px;padding:4px;border:1px solid var(--ui-border-soft);border-radius:999px;background:var(--ui-bg-soft)}.ui-view-toggle-button{border:none;background:transparent;color:var(--ui-text-muted);padding:8px 14px;border-radius:999px;cursor:pointer;font-weight:600}.ui-view-toggle-button.is-active{background:var(--ui-bg);color:var(--ui-brand-strong);box-shadow:0 4px 12px #0f172a14}.ui-table-wrap{overflow-x:auto}.ui-table{width:100%;border-collapse:collapse;min-width:1200px}.ui-th{text-align:left;border-bottom:1px solid var(--ui-border);padding:12px 10px;white-space:nowrap;background:var(--ui-bg-soft);color:var(--ui-text)}.ui-td{border-bottom:1px solid var(--ui-border-soft);padding:12px 10px;vertical-align:top;color:var(--ui-text)}.ui-table tbody tr:hover{background:#4f46e508}.ui-clickable-row{cursor:pointer}.ui-table-subtext{margin-top:4px;color:var(--ui-text-muted);font-size:12px}.ui-inline-help{display:inline-block;margin-top:8px;color:var(--ui-text-muted);font-size:13px}.parent-assignments-page{display:grid;gap:16px}.parent-assignment-filter{margin-bottom:4px}.parent-assignment-table{min-width:860px}.ui-detail-grid{display:grid;gap:10px}.parent-detail-line{display:grid;grid-template-columns:minmax(140px,220px) minmax(0,1fr);gap:12px;padding:12px;border:1px solid var(--ui-border-soft);border-radius:14px;background:var(--ui-bg-soft)}.parent-detail-line span{color:var(--ui-text-muted);font-weight:700}.parent-detail-line strong{overflow-wrap:anywhere}.ui-td-expanded{border-bottom:1px solid var(--ui-border-soft);padding:0 10px 14px;background:var(--ui-bg-soft)}.ui-note-box{max-width:260px;white-space:pre-wrap;line-height:1.4}.ui-time-badge{display:inline-block;padding:4px 10px;border-radius:999px;background:var(--ui-bg-muted);color:var(--ui-text);font-size:13px;font-weight:600}.ui-action-row{display:flex;gap:8px;flex-wrap:wrap}.ui-button{padding:8px 12px;border-radius:8px;cursor:pointer;transition:all .15s ease;font-size:14px}.ui-button:disabled{opacity:.55;cursor:not-allowed}.ui-button-primary{border:1px solid var(--ui-border);background:var(--ui-bg);color:var(--ui-text)}.ui-button-primary:hover:not(:disabled){background:var(--ui-brand-soft);border-color:var(--ui-brand);color:var(--ui-brand-strong)}.ui-button-secondary{border:1px solid var(--ui-border);background:var(--ui-bg);color:var(--ui-text)}.ui-button-secondary:hover:not(:disabled){background:var(--ui-bg-soft);border-color:var(--ui-brand);color:var(--ui-brand)}.ui-button-success{border:1px solid var(--ui-success-border);background:#f0fdf4;color:#166534}.ui-button-success:hover:not(:disabled){background:var(--ui-success-bg);border-color:#86efac}.ui-button-danger{border:1px solid var(--ui-danger);background:var(--ui-danger-bg);color:var(--ui-danger)}.ui-button-danger:hover:not(:disabled){background:#ffe4e6;border-color:#fda4af}.ui-chip-list{display:flex;flex-wrap:wrap;gap:8px}.ui-video-chip{display:inline-flex;align-items:center;padding:5px 10px;border-radius:999px;background:var(--ui-brand-soft);color:var(--ui-brand-strong);font-size:13px;font-weight:600;flex-wrap:wrap;transition:background .15s ease}.ui-video-chip:hover{background:var(--ui-brand-soft-hover)}.ui-video-chip-playlist{color:var(--ui-brand);font-weight:700}.ui-video-chip-divider{color:#818cf8;margin:0 4px}.ui-link{color:var(--ui-brand-strong);text-decoration:none}.ui-link:hover{color:var(--ui-brand);text-decoration:underline}.ui-status-badge{display:inline-block;padding:4px 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auto;gap:8px;margin-top:10px}.ui-assignment-type-list{display:grid;gap:8px;margin-top:12px}.ui-assignment-type-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border:1px solid var(--ui-border-soft);border-radius:10px;background:var(--ui-bg-soft)}.ui-assignment-type-name{color:var(--ui-text);font-weight:600}.ui-form-grid{display:grid;gap:12px;align-items:start}.ui-field-card{border:1px solid var(--ui-border-soft);border-radius:10px;padding:10px;background:var(--ui-bg);min-width:0;position:relative;transition:border-color .15s ease,box-shadow .15s ease}.ui-field-card:hover{border-color:#c7d2fe}.ui-label{display:block;margin-bottom:6px;font-weight:500;color:var(--ui-text)}.ui-input,.ui-select,.ui-textarea{width:100%;padding:8px;box-sizing:border-box;min-width:0;border:1px solid var(--ui-border);border-radius:6px;background:var(--ui-bg);color:var(--ui-text)}.ui-input:hover,.ui-select:hover,.ui-textarea:hover{border-color:#a5b4fc}.ui-input:focus,.ui-select:focus,.ui-textarea:focus{outline:none;border-color:var(--ui-brand);box-shadow:0 0 0 3px var(--ui-brand-ring)}.ui-textarea{resize:vertical;transition:min-height .2s ease,border-color .15s ease,box-shadow .15s ease}.ui-theme-toggle{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.ui-theme-option{border:1px solid var(--ui-border);border-radius:14px;padding:14px;background:var(--ui-bg-soft);color:var(--ui-text);text-align:left;cursor:pointer;display:grid;gap:6px;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}.ui-theme-option:hover{border-color:var(--ui-brand)}.ui-theme-option.is-active{border-color:var(--ui-brand);background:var(--ui-brand-soft);box-shadow:0 0 0 3px var(--ui-brand-ring)}.ui-theme-option span{color:var(--ui-text-muted);font-size:13px;line-height:1.45}.ui-coach-note-form-field{height:84px}.ui-coach-note-form-field.is-expanded{z-index:45}.ui-coach-note-form-textarea{height:38px;min-height:38px;resize:none;transition:border-color .15s ease,box-shadow .15s ease}.ui-coach-note-form-field.is-expanded .ui-coach-note-form-textarea{position:absolute;top:34px;left:10px;right:10px;height:120px;min-height:120px;z-index:46;background:var(--ui-bg);box-shadow:var(--ui-shadow-lg)}.ui-dropdown-trigger{width:100%;min-height:38px;border:1px solid var(--ui-border);border-radius:6px;background:var(--ui-bg);padding:8px 10px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;text-align:left;transition:all .15s ease}.ui-dropdown-trigger:hover{background:var(--ui-bg-soft);border-color:#a5b4fc}.ui-dropdown-menu{border:1px solid var(--ui-border);border-radius:10px;background:var(--ui-bg);box-shadow:var(--ui-shadow-lg);overflow:hidden;z-index:30}.ui-dropdown-menu-desktop{position:absolute;top:72px;left:10px;display:flex;min-width:620px;max-width:720px;height:320px}.ui-dropdown-menu-mobile{position:relative;margin-top:8px;display:block;width:100%;max-width:100%}.ui-assignment-type-dropdown-menu{position:absolute;top:58px;left:10px;right:10px;overflow:hidden}.ui-assignment-type-select{position:relative}.ui-assignment-type-options{height:320px;max-height:320px;overflow-y:scroll;padding:8px 8px 10px;scrollbar-gutter:stable;scrollbar-color:#8b8b8b #f4f4f5;scrollbar-width:auto}.ui-assignment-type-options::-webkit-scrollbar{width:17px}.ui-assignment-type-options::-webkit-scrollbar-track{background:#f4f4f5;border-left:1px solid #d1d5db}.ui-assignment-type-options::-webkit-scrollbar-thumb{min-height:32px;background:#8b8b8b;border:4px solid #f4f4f5;border-radius:999px}.ui-assignment-type-options::-webkit-scrollbar-button{height:17px;background:#f4f4f5}.ui-assignment-type-options::-webkit-scrollbar-button:vertical:start:single-button{background:linear-gradient(135deg,transparent 50%,#8b8b8b 50%) 6px 8px / 6px 6px no-repeat,linear-gradient(225deg,transparent 50%,#8b8b8b 50%) 5px 8px / 6px 6px no-repeat,#f4f4f5}.ui-assignment-type-options::-webkit-scrollbar-button:vertical:end:single-button{background:linear-gradient(45deg,transparent 50%,#8b8b8b 50%) 6px 3px / 6px 6px no-repeat,linear-gradient(315deg,transparent 50%,#8b8b8b 50%) 5px 3px / 6px 6px no-repeat,#f4f4f5}.ui-dropdown-playlist-column{background:var(--ui-bg)}.ui-dropdown-playlist-column-desktop{width:240px;border-right:1px solid var(--ui-border-soft);overflow-y:auto}.ui-dropdown-playlist-column-mobile{width:100%;border-bottom:1px solid 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