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var(--red-100)}.btn-danger-soft:hover{background:var(--red-100)}.btn-danger{background:var(--red-600);color:#fff;box-shadow:0 8px 16px #dc26262e}.btn-danger:hover{background:#b91c1c}.app-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:70;background:var(--overlay);display:flex;align-items:center;justify-content:center;padding:16px;overflow:auto;-webkit-overflow-scrolling:touch}.app-modal{width:100%;margin:auto;background:var(--surface);border-radius:16px;box-shadow:0 18px 40px #0f172a38;display:flex;flex-direction:column;max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px)}.app-modal-sm{max-width:380px}.app-modal-md{max-width:420px}.app-modal-lg{max-width:520px}.app-modal-body{padding:18px 18px 8px;overflow-y:auto;min-height:0;flex:1 1 auto}.app-modal-footer{flex-shrink:0;padding:12px 18px 16px;border-top:1px solid var(--slate-100);background:var(--surface)}.topup-modal-title{font-size:18px;font-weight:800;letter-spacing:-.02em;margin-bottom:4px;color:var(--slate-900)}.topup-modal-subtitle{font-size:13px;margin-bottom:12px}.topup-qr-wrap{display:flex;justify-content:center;margin-bottom:12px}.topup-qr-canvas{border-radius:12px;background:#fff;max-width:100%;height:auto}.topup-modal-copy{margin-bottom:10px}.topup-modal-wait{font-size:13px;margin-bottom:4px}.app-toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%) translateY(12px);z-index:120;display:flex;align-items:flex-start;gap:12px;min-width:280px;max-width:min(420px,calc(100vw - 24px));padding:14px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--slate-200);opacity:0;animation:app-toast-in .25s ease-out forwards}.app-toast-hide{animation:app-toast-out .2s ease-in forwards}.app-toast-icon{width:32px;height:32px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0}.app-toast-success{border-color:var(--emerald-100)}.app-toast-success .app-toast-icon{background:var(--emerald-50);color:var(--emerald-700)}.app-toast-error{border-color:var(--red-100)}.app-toast-error .app-toast-icon{background:var(--red-50);color:var(--red-600)}.app-toast-title{font-size:14px;font-weight:800;color:var(--slate-900);letter-spacing:-.02em}.app-toast-message{margin-top:2px;font-size:13px;color:var(--slate-500);line-height:1.4}@keyframes app-toast-in{0%{opacity:0;transform:translate(-50%) translateY(16px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes app-toast-out{0%{opacity:1;transform:translate(-50%) translateY(0)}to{opacity:0;transform:translate(-50%) translateY(12px)}}.confirm-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;z-index:80;padding:20px;animation:fade-in .2s ease-out}.confirm-modal{width:100%;max-width:400px;background:var(--surface);border-radius:18px;padding:28px 24px 22px;box-shadow:0 18px 40px #0f172a38;text-align:center;animation:topup-pop .35s cubic-bezier(.22,1,.36,1)}.confirm-modal-icon{width:56px;height:56px;margin:0 auto 14px;border-radius:16px;background:var(--red-50);color:var(--red-600);display:flex;align-items:center;justify-content:center}.confirm-modal-icon svg{width:26px;height:26px;display:block}.confirm-modal-icon-success{background:var(--emerald-50);color:var(--emerald-700)}.student-login-created-modal .confirm-modal-text{margin-bottom:16px}.student-login-created-box{background:linear-gradient(180deg,#f3fdf8,#f8fafc);border:1px solid var(--emerald-100);border-radius:12px;padding:12px 14px;margin-bottom:20px;text-align:left}.student-login-created-modal .confirm-modal-actions .btn-block{width:100%}.confirm-modal-title{font-size:20px;font-weight:800;color:var(--slate-900);letter-spacing:-.03em;margin-bottom:8px}.confirm-modal-text{font-size:14px;line-height:1.5;color:var(--slate-500);margin-bottom:22px}.confirm-modal-actions{display:flex;gap:10px}.confirm-modal-actions .btn{flex:1}.tutorial-card{padding:20px;background:var(--surface);box-shadow:var(--shadow);border:1px solid var(--border-soft)}.tutorial-video-wrap{position:relative;width:100%;aspect-ratio:16 / 9;min-height:360px;padding-top:0;border-radius:16px;overflow:hidden;background:#0f172a;box-shadow:var(--shadow-lg)}@supports not (aspect-ratio: 16 / 9){.tutorial-video-wrap{padding-top:56.25%;height:0;min-height:0}}.tutorial-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0;display:block}.tutorial-actions{margin-top:16px;display:flex;justify-content:flex-end}.tutorial-placeholder code{font-size:12px;background:var(--slate-100);padding:2px 6px;border-radius:6px}@media (min-width: 1024px){.tutorial-video-wrap{min-height:520px}}@media (max-width: 767px){.tutorial-card{padding:0}.tutorial-video-wrap{min-height:220px;border-radius:12px}.mobile-nav button{min-width:56px;padding:8px 2px}.mobile-nav button small{font-size:9px}}.auth-loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:var(--overlay);display:flex;align-items:center;justify-content:center;padding:20px;animation:fade-in .18s ease-out}.auth-loading-card{background:var(--surface);border-radius:16px;padding:22px 28px;min-width:180px;box-shadow:0 16px 36px #0f172a33;display:flex;flex-direction:column;align-items:center;gap:12px}.auth-loading-spinner{width:32px;height:32px;border-radius:50%;border:3px solid var(--emerald-100);border-top-color:var(--emerald-600);animation:auth-spin .7s linear infinite}.auth-loading-text{font-size:14px;font-weight:600;color:var(--slate-700)}@keyframes auth-spin{to{transform:rotate(360deg)}}@media (max-width: 480px){.profile-status{align-items:flex-start;flex-wrap:wrap}.profile-status-badge{margin-left:58px}}.btn-outline{background:var(--surface);color:var(--emerald-700);border:1px solid var(--emerald-100)}.btn-outline:hover{background:var(--emerald-50)}.btn-sm{padding:9px 14px;font-size:13px;border-radius:10px}.btn-block{width:100%}.btn:disabled{opacity:.6;cursor:not-allowed}.cards-grid{display:grid;gap:16px;grid-template-columns:1fr}@media (min-width: 640px){.cards-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1200px){.cards-grid{grid-template-columns:repeat(3,1fr)}}.student-card{background:var(--surface);border:1px solid var(--slate-200);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;transition:box-shadow .2s ease,transform .2s ease}.student-card:hover{box-shadow:0 4px 12px #0f172a14,0 12px 24px #0f172a0f;transform:translateY(-2px)}.student-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.student-card-identity,.student-summary-main{display:flex;align-items:center;gap:12px;min-width:0}.student-avatar{width:42px;height:42px;border-radius:12px;background:var(--emerald-50);color:var(--emerald-700);font-size:13px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;letter-spacing:.02em}.student-avatar-sm{width:36px;height:36px;font-size:12px;border-radius:10px}.student-card-name{font-weight:700;font-size:16px;color:var(--slate-900)}.student-card-grade{color:var(--slate-500);font-size:13px;margin-top:2px}.student-login-box{background:linear-gradient(180deg,#f3fdf8,#f8fafc);border:1px solid var(--emerald-100);border-radius:12px;padding:12px 14px}.student-login-box-empty{background:var(--slate-50);border-color:var(--slate-200)}.student-login-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--emerald-700);margin-bottom:8px}.student-login-box-empty .student-login-label{color:var(--slate-500)}.student-login-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.student-login-value{font-family:ui-monospace,Cascadia Code,Segoe UI Mono,Menlo,Consolas,monospace;font-size:18px;font-weight:800;color:var(--slate-900);letter-spacing:.04em;background:transparent;padding:0;word-break:break-all}.student-login-copy{flex-shrink:0;min-width:72px}.student-login-copy.is-copied{background:var(--emerald-50);color:var(--emerald-700);border-color:var(--emerald-100)}.student-card-badges{display:flex;flex-direction:column;gap:6px;align-items:flex-end;flex-shrink:0}.badge-pill{border-radius:999px;font-size:11px;font-weight:700;padding:4px 10px;white-space:nowrap}.badge-pill.badge-emerald{background:var(--emerald-100);color:var(--emerald-700)}.badge-pill.badge-red{background:var(--red-100);color:var(--red-600)}.student-card-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:14px 0;border-top:1px solid var(--slate-100);border-bottom:1px solid var(--slate-100)}.student-stat-label{color:var(--slate-500);font-size:11px;text-transform:uppercase;letter-spacing:.04em}.student-stat-value{font-weight:700;font-size:16px;color:var(--slate-900);margin-top:2px}.student-card-actions{display:flex;gap:8px}.student-card-actions .btn{flex:1}.student-card-links{display:flex;justify-content:space-between;gap:8px}.list-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 4px;border-top:1px solid var(--slate-100);border-radius:10px;transition:background .15s ease}.list-row:hover{background:var(--slate-50)}.list-row:first-child{border-top:none}.list-row-title{font-weight:600;font-size:14px;color:var(--slate-900)}.list-row-subtitle{color:var(--slate-500);font-size:12px;margin-top:2px}.empty-state{text-align:center;padding:40px 16px;color:var(--slate-500)}.empty-state-icon{width:56px;height:56px;margin:0 auto 12px;border-radius:16px;background:linear-gradient(145deg,var(--emerald-500),var(--emerald-700));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(var(--brand-rgb),.22)}.empty-state-icon svg{width:26px;height:26px}.empty-state-title{font-size:15px;font-weight:800;color:var(--slate-800);letter-spacing:-.02em}.empty-state-text{font-size:13px;line-height:1.45;max-width:28rem;margin:6px auto 0}.empty-state .btn{margin-top:16px}.order-list-row{align-items:flex-start;gap:16px}.order-list-main{min-width:0;flex:1}.order-list-meta{display:flex;flex-direction:column;align-items:flex-end;gap:8px;flex-shrink:0}.order-list-amount{color:var(--slate-900);font-size:14px;white-space:nowrap}@media (max-width: 480px){.order-list-row{flex-direction:column;align-items:stretch}.order-list-meta{flex-direction:row;align-items:center;justify-content:space-between}}.order-row{width:100%;border:none;background:transparent;cursor:pointer;font:inherit;color:inherit;text-align:left}.order-row:hover,.order-row:focus-visible{background:var(--slate-50);outline:none}.badge-pill.badge-amber{background:var(--amber-100);color:var(--amber-600)}.badge-pill.badge-slate{background:var(--slate-100);color:var(--slate-600)}.order-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.order-items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.order-item{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:10px 12px;background:var(--slate-50);border-radius:10px}.order-item-main{min-width:0;flex:1}.order-item-name{font-size:14px;font-weight:600;color:var(--slate-800)}.order-item-desc{margin-top:2px;font-size:12px;color:var(--slate-500);line-height:1.4}.order-item-meta{margin-top:4px;font-size:12px;font-weight:700;color:var(--slate-500)}.order-item-price{font-size:14px;font-weight:700;color:var(--slate-700);white-space:nowrap}@media (max-width: 480px){.order-detail-grid{grid-template-columns:1fr}}@media (min-width: 768px){.page{flex-direction:row}.sidebar{display:flex}.main{margin-left:268px;padding:24px 28px 32px}.mobile-nav{display:none}}@media (max-width: 767px){.main{padding-bottom:110px}.topbar{margin-bottom:12px}.card{padding:14px}th,td{min-width:120px;padding:10px 12px}}@media (min-width: 1024px){.main{padding:28px 36px 40px}.card{padding:24px}.metric-hero-value{font-size:40px}}