:root{--bg: #f6f7f9;--surface: #ffffff;--border: #e6e8ec;--text: #1f2430;--muted: #8a93a3;--primary: #2563eb;--primary-dark: #1d4ed8;--accent: #f5c518;--accent-dark: #e0b30c;--green: #16a34a;--amber: #f59e0b;--gray-dot: #9ca3af;--danger: #dc2626;--radius: 12px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .1)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}h1{font-size:1.6rem;font-weight:700;margin:0}.muted{color:var(--muted)}.small{font-size:.82rem}.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:10px 16px;font-size:.92rem;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,opacity .15s}.btn:disabled{opacity:.6;cursor:default}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-add{background:var(--accent);color:#1f2430}.btn-add:hover{background:var(--accent-dark)}.btn-ghost{background:#fff;border-color:var(--border);color:var(--text)}.btn-ghost:hover:not(:disabled){background:#f3f4f6}.btn-danger-ghost{background:#fff;border-color:#f3c6c6;color:var(--danger)}.btn-danger-ghost:hover:not(:disabled){background:#fef2f2}.btn-google{background:#fff;border-color:var(--border);color:var(--text);width:100%;justify-content:center;padding:12px}.btn-google:hover{background:#f8f9fa}.link-btn{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;padding:4px;font-size:.9rem}.link-btn:hover{text-decoration:underline}.icon-btn{background:none;border:none;font-size:1.1rem;color:var(--muted);cursor:pointer;padding:4px 8px;border-radius:8px}.icon-btn:hover{background:#f3f4f6}.centered-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:32px}.login-card{width:360px;max-width:100%;text-align:center}.login-card h1{margin:16px 0 4px}.login-card .btn{margin-top:20px}.login-card .small{margin-top:16px}.brand-mark{width:56px;height:56px;margin:0 auto;border-radius:14px;background:var(--primary);color:#fff;font-weight:700;font-size:1.3rem;display:grid;place-items:center}.login-logo{margin:0 auto 4px;padding:18px 24px;border-radius:14px;background:#11161f;display:grid;place-items:center}.login-logo img{width:200px;max-width:100%;height:auto;display:block}.login-wingspan{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:16px}.login-wingspan-mark{width:44px;height:44px;border-radius:10px;background:#000;display:grid;place-items:center;overflow:hidden;flex-shrink:0}.login-wingspan-mark img{width:100%;height:100%;object-fit:contain}.login-wingspan-name{font-size:1.5rem;font-weight:700}.login-subtitle{margin:4px 0 0;font-weight:400;color:var(--text)}.brand-mark.denied{background:#fef2f2;color:var(--danger);border:1px solid #f3c6c6}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}:root{--sidebar-w: 260px;--sidebar-bg: #10141f;--sidebar-text: #c2c8d4;--sidebar-muted: #7c8599;--appbar-h: 68px}.app-shell{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--sidebar-bg);color:var(--sidebar-text);position:sticky;top:0;align-self:flex-start;height:100vh;overflow-y:auto;display:flex;flex-direction:column;padding:16px 14px 24px;transition:margin-left .2s ease}.app-shell.sidebar-collapsed .sidebar{margin-left:calc(-1 * var(--sidebar-w))}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:8px 10px 20px}.sidebar-logo{height:44px;width:auto;flex-shrink:0;mix-blend-mode:screen}.sidebar-brand-text{display:flex;flex-direction:column;line-height:1.1}.sidebar-brand-name{color:#fff;font-size:1.35rem;font-weight:700;letter-spacing:-.01em}.sidebar-brand-sub{color:var(--sidebar-muted);font-size:.62rem;font-weight:600;letter-spacing:.22em;margin-top:2px}.sidebar-nav{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.sidebar-group{margin-bottom:2px}.sidebar-item{width:100%;display:flex;align-items:center;gap:12px;background:none;border:none;color:var(--sidebar-text);font:inherit;font-size:.93rem;font-weight:600;text-align:left;padding:11px 12px;border-radius:10px;cursor:pointer;transition:background .12s,color .12s}.sidebar-item:hover{background:#ffffff0f;color:#fff}.sidebar-item-icon{display:inline-flex;flex-shrink:0}.sidebar-item-label{flex:1}.sidebar-chevron{display:inline-flex;color:var(--sidebar-muted)}.sidebar-item.active,.sidebar-subitem.active,.sidebar-item.active:hover{background:var(--accent);color:#1f2430}.sidebar-sub{list-style:none;margin:2px 0 6px;padding:0 0 0 46px;display:flex;flex-direction:column;gap:1px}.sidebar-subitem{width:100%;background:none;border:none;color:var(--sidebar-muted);font:inherit;font-size:.88rem;text-align:left;padding:9px 12px;border-radius:8px;cursor:pointer;transition:background .12s,color .12s}.sidebar-subitem:hover{background:#ffffff0f;color:#fff}.sidebar-subitem.active{font-weight:600}.sidebar-subitem.active:hover{background:var(--accent);color:#1f2430}.sidebar-backdrop{display:none}.app-main{flex:1;min-width:0;display:flex;flex-direction:column}.appbar{height:var(--appbar-h);display:flex;align-items:center;gap:16px;padding:0 22px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.appbar-burger{background:none;border:none;color:var(--text);cursor:pointer;padding:8px;border-radius:8px;display:inline-flex}.appbar-burger:hover{background:#f3f4f6}.appbar-search{position:relative;flex:1;max-width:560px}.appbar-search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);display:inline-flex}.appbar-search input{width:100%;padding:11px 14px 11px 42px;border:1px solid var(--border);border-radius:10px;background:#f6f7f9;font-size:.92rem}.appbar-search input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px #2563eb1f}.appbar-right{margin-left:auto;display:flex;align-items:center;gap:14px}.appbar-bell{position:relative;background:none;border:none;color:#42495a;cursor:pointer;padding:6px;border-radius:8px;display:inline-flex}.appbar-bell:hover{background:#f3f4f6}.appbar-bell-badge{position:absolute;top:-1px;right:-1px;min-width:16px;height:16px;padding:0 4px;border-radius:999px;background:var(--danger);color:#fff;font-size:.65rem;font-weight:700;display:grid;place-items:center}.appbar-user{position:relative}.appbar-user-btn{display:flex;align-items:center;gap:10px;background:none;border:none;cursor:pointer;padding:4px 6px 4px 4px;border-radius:10px;color:var(--text)}.appbar-user-btn:hover{background:#f3f4f6}.appbar-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover}.appbar-avatar.placeholder{display:grid;place-items:center;background:#1f3a8a;color:#fff;font-size:.8rem;font-weight:700}.appbar-user-meta{display:flex;flex-direction:column;line-height:1.2;text-align:left}.appbar-user-name{font-size:.88rem;font-weight:600;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.appbar-user-role{font-size:.74rem;color:var(--muted)}.appbar-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:200px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:8px;z-index:30;display:flex;flex-direction:column;gap:2px}.appbar-menu-email{font-size:.78rem;color:var(--muted);padding:6px 10px;border-bottom:1px solid var(--border);margin-bottom:4px;overflow:hidden;text-overflow:ellipsis}.appbar-menu-item{background:none;border:none;text-align:left;font:inherit;font-size:.9rem;color:var(--text);padding:9px 10px;border-radius:8px;cursor:pointer}.appbar-menu-item:hover{background:#f3f4f6}.app-content{flex:1}.not-implemented{min-height:calc(100vh - var(--appbar-h));display:grid;place-items:center;padding:40px 24px}.not-implemented-card{text-align:center;max-width:420px}.not-implemented-badge{font-size:2.4rem;margin-bottom:8px}.not-implemented-card h1{margin-bottom:8px}.not-implemented-card p{margin:4px 0}.page{width:100%;max-width:none;padding:28px 28px 64px}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:22px}.page-head h1{font-size:2.2rem}.page-sub{margin:6px 0 0;font-size:1rem}.toolbar{display:flex;align-items:center;gap:16px;margin-bottom:16px}.toolbar-spacer{flex:1}.search{position:relative;flex:1;max-width:420px}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:1.1rem}.search input{width:100%;padding:11px 14px 11px 36px;border:1px solid var(--border);border-radius:10px;background:#fff;font-size:.92rem}.search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.count{color:var(--muted);font-size:.88rem}.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto;-webkit-overflow-scrolling:touch}.students-table{width:100%;border-collapse:collapse;min-width:720px}.students-table thead th{text-align:left;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);font-weight:600;padding:14px 18px;background:#fafbfc;border-bottom:1px solid var(--border)}.students-table tbody td{padding:14px 18px;border-bottom:1px solid var(--border);font-size:.92rem;vertical-align:middle}.students-table tbody tr:last-child td{border-bottom:none}.students-table tbody tr:hover{background:#fafbff}.col-actions{text-align:right;width:110px}.empty{text-align:center;color:var(--muted);padding:40px!important}.name-cell{display:flex;align-items:center;gap:12px}.avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.8rem;color:#3b3b3b;flex-shrink:0}.name-text{font-weight:600}.stacked{display:flex;flex-direction:column;line-height:1.35}.stacked .sub{color:var(--muted);font-size:.82rem}.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:.8rem;font-weight:600}.badge .dot{width:7px;height:7px;border-radius:50%;background:currentColor}.status-active{background:#e7f6ec;color:var(--green)}.status-paused{background:#fef3dc;color:var(--amber)}.status-inactive{background:#f1f2f4;color:var(--gray-dot)}.page-error{margin:0 0 16px}.form-error{color:var(--danger);font-size:.86rem;margin:4px 0 0}.drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#10182866;display:flex;justify-content:flex-end;z-index:50}.drawer{width:50vw;max-width:100%;height:100%;background:var(--surface);display:flex;flex-direction:column;box-shadow:-8px 0 24px #1018281f;animation:slide-in .2s ease}@keyframes slide-in{0%{transform:translate(24px);opacity:0}}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border)}.drawer-header h2{margin:0;font-size:1.2rem}.drawer-body{padding:24px;overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:18px}.field{display:flex;flex-direction:column;gap:6px}.field>span{font-size:.85rem;font-weight:600;color:#42495a}.field em{color:var(--danger);font-style:normal}.field input,.field select{padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:.92rem;background:#fff;color:var(--text)}.field input:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.drawer-tabs{display:flex;gap:4px;padding:0 24px;border-bottom:1px solid var(--border)}.drawer-tab{padding:10px 14px;background:none;border:none;border-bottom:2px solid transparent;font-size:.9rem;font-weight:600;color:#6b7385;cursor:pointer}.drawer-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.comments-panel{display:flex;flex-direction:column;gap:12px}.comments-panel textarea{padding:10px 12px;border:1px solid var(--border);border-radius:10px;font:inherit;resize:vertical}.comments-add{align-self:flex-start}.comments-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.comment-item{padding:10px 12px;background:#f4f6fa;border-radius:10px}.comment-item p{margin:4px 0 0;white-space:pre-wrap}.comment-meta{font-size:.78rem}.comment-cell{display:flex;align-items:center;gap:10px}.comment-indicator{position:relative;display:inline-flex;align-items:center;gap:4px;color:#6b7385;flex-shrink:0;background:none;border:0;padding:2px;cursor:pointer}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:#fff;border-radius:8px;padding:16px;width:min(420px,92vw);display:flex;flex-direction:column;gap:12px}.modal textarea{width:100%;box-sizing:border-box}.modal-actions{display:flex;justify-content:flex-end;gap:8px}.comment-count{font-size:.8rem;font-weight:700;color:var(--primary)}.comment-latest{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.drawer-footer{display:flex;align-items:center;gap:10px;padding:16px 24px;border-top:1px solid var(--border)}.drawer-footer .spacer{flex:1}@media (max-width: 900px){.sidebar{position:fixed;top:0;left:0;z-index:60;margin-left:0;box-shadow:8px 0 24px #0000004d}.app-shell.sidebar-collapsed .sidebar{margin-left:calc(-1 * var(--sidebar-w));box-shadow:none}.app-shell:not(.sidebar-collapsed) .sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#10182873;z-index:50}.page-head h1{font-size:1.7rem}}@media (max-width: 640px){.field-row{grid-template-columns:1fr}.appbar-user-meta,.appbar-search{display:none}.appbar{padding:0 14px;gap:10px}.page{padding:18px 14px 48px}.page-head h1{font-size:1.5rem}.drawer-backdrop{justify-content:flex-end;align-items:stretch}.drawer{width:100%;height:100%;max-height:100%;border-radius:0}.drawer-header{padding:16px}.drawer-body{padding:18px 16px}.drawer-footer{padding:14px 16px}.table-wrap{overflow-x:visible;background:transparent;border:none;box-shadow:none}.students-table{min-width:0}.students-table thead{display:none}.students-table tbody tr{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:12px}.students-table tbody tr:hover{background:var(--surface)}.students-table tbody td{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:11px 16px;text-align:right;border-bottom:1px solid var(--border)}.students-table tbody td:before{content:attr(data-label);font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);font-weight:600;text-align:left;flex-shrink:0}.students-table tbody tr:last-child td{border-bottom:1px solid var(--border)}.students-table tbody tr td:last-child{border-bottom:none}.students-table td.col-actions{width:auto}.students-table td.empty{display:block;text-align:center}.students-table td.empty:before{display:none}}