:root{
 --dl-ink:#0f172a;--dl-muted:#5b6b82;--dl-line:#dbe4ef;--dl-bg:#f6f8fc;--dl-card:#fff;
 --dl-primary:#1d4ed8;--dl-primary2:#4f46e5;--dl-navy:#0f2557;--dl-sky:#0ea5e9;
 --dl-green:#15803d;--dl-amber:#b45309;--dl-red:#b91c1c;--dl-purple:#7c3aed;
 --dl-shadow:0 28px 90px rgba(15,23,42,.25);--dl-radius:18px;
}
body.deep-learning-active{padding-bottom:max(82px,calc(72px + env(safe-area-inset-bottom,0px)))!important}
body.deep-focus .dl-topic-chip,body.deep-focus .dl-dock{opacity:.18;transition:opacity .2s ease}
body.deep-focus .dl-topic-chip:hover,body.deep-focus .dl-dock:hover,body.deep-focus .dl-dock:focus-within{opacity:1}
body.deep-projector{font-size:112%}
body.deep-projector button,body.deep-projector a,body.deep-projector input,body.deep-projector textarea,body.deep-projector select{min-height:48px}

.dl-topic-chip{position:fixed;z-index:2147482200;top:max(10px,env(safe-area-inset-top,0px));left:max(10px,env(safe-area-inset-left,0px));display:flex;align-items:center;gap:9px;max-width:min(74vw,520px);padding:8px 12px;border:1px solid rgba(255,255,255,.35);border-radius:999px;background:rgba(15,37,87,.92);color:#fff;box-shadow:0 12px 34px rgba(15,23,42,.25);backdrop-filter:blur(18px);font:800 12px/1.2 Inter,ui-sans-serif,system-ui,sans-serif}
.dl-topic-chip strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.dl-online{width:9px;height:9px;flex:none;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.18)}.dl-chip-progress{color:#bae6fd;white-space:nowrap}

.dl-dock{position:fixed;z-index:2147483000;left:50%;bottom:max(10px,env(safe-area-inset-bottom,0px));transform:translateX(-50%);display:flex;align-items:center;gap:5px;max-width:calc(100vw - 16px);padding:7px;border:1px solid rgba(255,255,255,.2);border-radius:20px;background:rgba(15,23,42,.95);color:#fff;box-shadow:0 18px 54px rgba(15,23,42,.38);backdrop-filter:blur(18px)}
.dl-dock a,.dl-dock button{position:relative;min-width:48px;height:48px;padding:0 12px;border:0;border-radius:14px;background:transparent;color:inherit;display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none;cursor:pointer;font:850 12px/1 Inter,ui-sans-serif,system-ui,sans-serif;white-space:nowrap}
.dl-dock a:hover,.dl-dock button:hover,.dl-dock a:focus-visible,.dl-dock button:focus-visible{background:rgba(255,255,255,.12);outline:none}.dl-dock .dl-main{background:linear-gradient(135deg,#2563eb,#4f46e5)}.dl-dock svg{width:20px;height:20px;flex:none}.dl-label{display:none}.dl-mini{position:absolute;right:3px;top:3px;min-width:19px;height:19px;padding:0 4px;border-radius:999px;background:#fff;color:#1d4ed8;display:grid;place-items:center;font-size:9px;font-weight:950}.dl-due{background:#fef3c7!important;color:#92400e!important}

.dl-scrim{position:fixed;inset:0;z-index:2147483100;background:rgba(15,23,42,.58);backdrop-filter:blur(4px);opacity:0;pointer-events:none;transition:opacity .22s ease}.dl-scrim.open{opacity:1;pointer-events:auto}
.dl-panel{position:fixed;z-index:2147483200;inset:0 0 0 auto;width:min(760px,100vw);display:flex;flex-direction:column;background:var(--dl-bg);color:var(--dl-ink);box-shadow:var(--dl-shadow);transform:translateX(102%);transition:transform .27s cubic-bezier(.22,.8,.2,1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}.dl-panel.open{transform:none}
.dl-head{position:relative;padding:18px 64px 17px 20px;background:linear-gradient(135deg,#0f2557,#1d4ed8 56%,#4f46e5);color:#fff;overflow:hidden}.dl-head:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-120px;top:-170px;background:rgba(255,255,255,.09)}.dl-head-top{position:relative;z-index:1;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.dl-badge{padding:5px 8px;border:1px solid rgba(255,255,255,.22);border-radius:999px;background:rgba(255,255,255,.1);color:#dbeafe;font-size:10px;font-weight:900;letter-spacing:.03em}.dl-head h2{position:relative;z-index:1;margin:9px 0 4px;font-size:clamp(1.2rem,3vw,1.65rem);line-height:1.2}.dl-head p{position:relative;z-index:1;margin:0;color:#dbeafe;font-size:.85rem;line-height:1.5}.dl-close{position:absolute;z-index:3;right:12px;top:12px;width:42px;height:42px;border:1px solid rgba(255,255,255,.25);border-radius:13px;background:rgba(255,255,255,.1);color:#fff;cursor:pointer;font-size:23px}.dl-head-metrics{position:relative;z-index:1;display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;margin-top:14px}.dl-progress{height:9px;border-radius:999px;background:rgba(255,255,255,.16);overflow:hidden}.dl-progress>i{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,#38bdf8,#86efac);transition:width .3s ease}.dl-percent,.dl-time{font-size:11px;font-weight:900;white-space:nowrap}.dl-time{color:#bae6fd}

.dl-phases{display:flex;gap:6px;padding:10px;border-bottom:1px solid var(--dl-line);background:#fff;overflow-x:auto;scrollbar-width:none}.dl-phases::-webkit-scrollbar{display:none}.dl-phase{position:relative;flex:0 0 auto;min-width:108px;min-height:48px;padding:7px 10px 7px 38px;border:1px solid transparent;border-radius:13px;background:transparent;color:#526176;text-align:left;cursor:pointer}.dl-phase b{display:block;font-size:.72rem}.dl-phase small{display:block;margin-top:2px;font-size:.62rem;color:#8492a6}.dl-phase-num{position:absolute;left:8px;top:8px;width:24px;height:24px;border-radius:8px;background:#e2e8f0;color:#475569;display:grid;place-items:center;font-size:11px;font-weight:950}.dl-phase.active{border-color:#93c5fd;background:#eff6ff;color:#1d4ed8}.dl-phase.active .dl-phase-num{background:#2563eb;color:#fff}.dl-phase.done{color:#166534}.dl-phase.done .dl-phase-num{background:#dcfce7;color:#15803d}.dl-phase.done .dl-phase-num:after{content:"✓"}.dl-phase.done .dl-phase-num span{display:none}

.dl-body{flex:1;overflow:auto;padding:16px 18px calc(84px + env(safe-area-inset-bottom,0px));overscroll-behavior:contain;scroll-behavior:smooth}.dl-view{animation:dlIn .22s ease}@keyframes dlIn{from{opacity:.45;transform:translateY(5px)}to{opacity:1;transform:none}}
.dl-section-title{display:flex;align-items:start;justify-content:space-between;gap:12px;margin:0 0 12px}.dl-section-title h3{margin:0;font-size:1.12rem}.dl-section-title p{margin:4px 0 0;color:var(--dl-muted);font-size:.83rem;line-height:1.5}.dl-phase-tag{flex:none;padding:6px 9px;border-radius:999px;background:#e0e7ff;color:#4338ca;font-size:.68rem;font-weight:900}
.dl-card{margin-bottom:12px;padding:15px;border:1px solid var(--dl-line);border-radius:var(--dl-radius);background:var(--dl-card);box-shadow:0 7px 23px rgba(15,23,42,.045)}.dl-card.highlight{border-color:#bfdbfe;background:linear-gradient(145deg,#eff6ff,#fff)}.dl-card.success{border-color:#bbf7d0;background:#f0fdf4}.dl-card.warning{border-color:#fde68a;background:#fffbeb}.dl-card.danger{border-color:#fecaca;background:#fff7f7}.dl-card h4{margin:0 0 7px;font-size:.96rem}.dl-card p{margin:0;color:#526176;font-size:.86rem;line-height:1.6}.dl-card p+p{margin-top:8px}.dl-eyebrow{display:inline-flex;align-items:center;gap:6px;margin-bottom:8px;padding:5px 8px;border-radius:999px;background:#dbeafe;color:#1e40af;font-size:10px;font-weight:950;letter-spacing:.05em;text-transform:uppercase}.dl-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.dl-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.dl-stack{display:grid;gap:9px}
.dl-field{display:grid;gap:6px}.dl-field label,.dl-label-text{font-size:.77rem;font-weight:900;color:#475569}.dl-field input,.dl-field textarea,.dl-field select{width:100%;min-height:44px;padding:10px 11px;border:1px solid #cbd5e1;border-radius:11px;background:#fff;color:#0f172a;outline:none;font:inherit;font-size:.86rem}.dl-field textarea{min-height:105px;resize:vertical;line-height:1.55}.dl-field input:focus,.dl-field textarea:focus,.dl-field select:focus{border-color:#60a5fa;box-shadow:0 0 0 3px rgba(59,130,246,.14)}.dl-field .invalid{border-color:#fca5a5}.dl-help{color:#76869a;font-size:.72rem;line-height:1.45}.dl-counter{text-align:right;color:#94a3b8;font-size:.66rem}
.dl-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:11px}.dl-btn{min-height:43px;padding:0 13px;border:1px solid #cbd5e1;border-radius:11px;background:#fff;color:#334155;display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none;cursor:pointer;font-weight:900;font-size:.79rem}.dl-btn:hover{border-color:#93c5fd;background:#f8fafc}.dl-btn.primary{border-color:#2563eb;background:#2563eb;color:#fff}.dl-btn.success{border-color:#16a34a;background:#16a34a;color:#fff}.dl-btn.ghost{border-color:transparent;background:#f1f5f9}.dl-btn.danger{border-color:#fecaca;background:#fff1f2;color:#b91c1c}.dl-btn.block{width:100%}.dl-btn[disabled]{opacity:.48;cursor:not-allowed}.dl-nav-actions{position:sticky;bottom:-84px;z-index:4;display:flex;justify-content:space-between;gap:10px;margin:20px -18px -84px;padding:12px 18px calc(12px + env(safe-area-inset-bottom,0px));border-top:1px solid rgba(219,228,239,.9);background:rgba(246,248,252,.92);backdrop-filter:blur(16px)}
.dl-option-list{display:grid;gap:8px;margin-top:10px}.dl-option{position:relative;display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;padding:11px;border:1px solid #dbe4ef;border-radius:12px;background:#fff;cursor:pointer}.dl-option:hover{border-color:#93c5fd}.dl-option input{width:19px;height:19px;margin:1px 0;accent-color:#2563eb}.dl-option span{font-size:.84rem;line-height:1.45;color:#334155}.dl-option.selected{border-color:#60a5fa;background:#eff6ff}.dl-option.correct{border-color:#86efac;background:#f0fdf4}.dl-option.wrong{border-color:#fca5a5;background:#fff1f2}.dl-feedback{margin-top:9px;padding:10px 11px;border-radius:11px;background:#f1f5f9;color:#475569;font-size:.78rem;line-height:1.5}.dl-feedback.good{background:#dcfce7;color:#166534}.dl-feedback.bad{background:#fee2e2;color:#991b1b}
.dl-context-data{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.dl-data-chip{padding:6px 9px;border-radius:999px;background:#fff;border:1px solid #dbeafe;color:#1e40af;font-size:.7rem;font-weight:850}.dl-product{margin-top:10px;padding:10px 12px;border-left:3px solid #2563eb;border-radius:0 11px 11px 0;background:#f8fafc;color:#475569;font-size:.79rem;line-height:1.5}
.dl-goals{display:grid;gap:8px;margin-top:9px}.dl-goal{display:grid;grid-template-columns:auto 1fr;gap:9px;align-items:start;padding:10px;border:1px solid #e2e8f0;border-radius:12px;background:#f8fafc}.dl-goal input{width:18px;height:18px;margin:1px 0;accent-color:#2563eb}.dl-goal span{font-size:.82rem;line-height:1.45;color:#334155}.dl-goal:has(input:checked){border-color:#86efac;background:#f0fdf4}
.dl-profile{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:center}.dl-profile-score{width:72px;height:72px;border-radius:20px;background:linear-gradient(135deg,#dbeafe,#e0e7ff);display:grid;place-items:center;color:#1d4ed8;font-size:1.25rem;font-weight:950}.dl-profile b{display:block;font-size:.95rem}.dl-profile span{display:block;margin-top:5px;color:#64748b;font-size:.78rem;line-height:1.45}.dl-mode-pills{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.dl-mode{padding:7px 10px;border:1px solid #dbe4ef;border-radius:999px;background:#fff;color:#526176;cursor:pointer;font-size:.7rem;font-weight:900}.dl-mode.active{border-color:#2563eb;background:#eff6ff;color:#1d4ed8}
.dl-experiment{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start}.dl-exp-num{width:32px;height:32px;border-radius:10px;background:#e0e7ff;color:#4338ca;display:grid;place-items:center;font-weight:950}.dl-experiment .dl-field textarea{min-height:80px}.dl-icap{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.dl-icap-item{padding:9px;border:1px solid #dbe4ef;border-radius:12px;background:#fff;text-align:center}.dl-icap-item b{display:block;color:#1d4ed8;font-size:.72rem}.dl-icap-item span{display:block;margin-top:4px;color:#64748b;font-size:.65rem;line-height:1.35}.dl-icap-item.active{border-color:#60a5fa;background:#eff6ff}
.dl-rep-tabs{display:flex;gap:6px;overflow:auto;padding-bottom:5px;scrollbar-width:none}.dl-rep-tabs::-webkit-scrollbar{display:none}.dl-rep-tab{flex:0 0 auto;min-height:38px;padding:0 10px;border:1px solid #dbe4ef;border-radius:10px;background:#fff;color:#526176;cursor:pointer;font-size:.72rem;font-weight:850}.dl-rep-tab.active{border-color:#2563eb;background:#2563eb;color:#fff}.dl-bridge{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:9px}.dl-bridge span{padding:6px 9px;border-radius:999px;background:#f1f5f9;color:#475569;font-size:.68rem;font-weight:850}.dl-bridge i{color:#94a3b8;font-style:normal}
.dl-steps{margin:10px 0 0;padding:0;list-style:none;counter-reset:dlstep}.dl-steps li{position:relative;counter-increment:dlstep;padding:0 0 13px 39px;color:#475569;font-size:.83rem;line-height:1.5}.dl-steps li:before{content:counter(dlstep);position:absolute;left:0;top:0;width:27px;height:27px;border-radius:9px;background:#dbeafe;color:#1d4ed8;display:grid;place-items:center;font-weight:950}.dl-steps li:not(:last-child):after{content:"";position:absolute;left:13px;top:29px;bottom:2px;width:1px;background:#bfdbfe}
.dl-hints{display:grid;gap:6px;margin-top:9px}.dl-hint{padding:9px 10px;border:1px dashed #fbbf24;border-radius:10px;background:#fffbeb;color:#92400e;font-size:.76rem;line-height:1.45}.dl-hint.locked{filter:blur(4px);user-select:none}.dl-support-meter{display:flex;gap:5px;align-items:center;margin-top:9px;color:#64748b;font-size:.68rem}.dl-support-meter i{width:24px;height:6px;border-radius:999px;background:#e2e8f0}.dl-support-meter i.on{background:#f59e0b}
.dl-compare{display:grid;grid-template-columns:1fr 1fr;gap:9px}.dl-method{padding:12px;border:1px solid #dbe4ef;border-radius:14px;background:#f8fafc}.dl-method b{display:block;color:#1d4ed8;font-size:.77rem}.dl-method p{margin-top:5px;font-size:.78rem}
.dl-rubric{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.dl-rubric button{min-height:50px;padding:7px;border:1px solid #dbe4ef;border-radius:11px;background:#fff;color:#475569;cursor:pointer;font-size:.68rem;font-weight:850}.dl-rubric button.active{border-color:#2563eb;background:#eff6ff;color:#1d4ed8}.dl-rubric button b{display:block;font-size:.86rem;margin-bottom:2px}
.dl-retrieval-grid{display:grid;gap:9px}.dl-review-status{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:12px;background:#eff6ff;color:#1e40af;font-size:.77rem;font-weight:850}.dl-review-status.due{background:#fff7ed;color:#9a3412}.dl-mastery{display:grid;gap:8px}.dl-mastery-row{display:grid;grid-template-columns:108px 1fr 38px;gap:8px;align-items:center}.dl-mastery-row span{font-size:.72rem;color:#475569;font-weight:850}.dl-mastery-track{height:8px;border-radius:999px;background:#e2e8f0;overflow:hidden}.dl-mastery-track i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#2563eb,#0ea5e9)}.dl-mastery-row b{font-size:.7rem;text-align:right;color:#1d4ed8}
.dl-timer{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center}.dl-timer strong{font:950 clamp(1.65rem,5vw,2.35rem)/1 ui-monospace,SFMono-Regular,monospace;color:#172554}.dl-timer small{display:block;margin-top:5px;color:#64748b;font-size:.72rem}.dl-tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.dl-tool{min-height:70px;padding:11px;border:1px solid #dbe4ef;border-radius:13px;background:#fff;cursor:pointer;text-align:left}.dl-tool b{display:block;font-size:.8rem}.dl-tool span{display:block;margin-top:4px;color:#64748b;font-size:.68rem;line-height:1.35}
.dl-toast{position:fixed;z-index:2147483600;left:50%;bottom:88px;transform:translate(-50%,14px);max-width:min(420px,calc(100vw - 24px));padding:11px 14px;border-radius:12px;background:#0f172a;color:#fff;box-shadow:0 14px 40px rgba(15,23,42,.3);opacity:0;pointer-events:none;transition:.2s ease;font:800 12px/1.4 Inter,system-ui,sans-serif}.dl-toast.show{opacity:1;transform:translate(-50%,0)}
.dl-sr{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.dl-hidden{display:none!important}

@media(min-width:760px){.dl-panel{top:10px;bottom:10px;right:10px;height:auto;border-radius:24px;overflow:hidden}.dl-label{display:inline}.dl-dock a,.dl-dock button{padding:0 14px}.dl-body{padding-left:22px;padding-right:22px}.dl-nav-actions{margin-left:-22px;margin-right:-22px;padding-left:22px;padding-right:22px}}
@media(max-width:640px){.dl-head{padding-left:16px}.dl-body{padding:13px 12px calc(84px + env(safe-area-inset-bottom,0px))}.dl-grid-2,.dl-grid-3,.dl-compare{grid-template-columns:1fr}.dl-icap{grid-template-columns:1fr 1fr}.dl-rubric{grid-template-columns:1fr 1fr}.dl-phases{padding:8px}.dl-phase{min-width:96px;padding-left:34px}.dl-nav-actions{margin-left:-12px;margin-right:-12px;padding-left:12px;padding-right:12px}.dl-topic-chip{right:10px;max-width:calc(100vw - 20px)}.dl-mastery-row{grid-template-columns:90px 1fr 34px}}
@media(max-width:430px){.dl-dock{width:calc(100vw - 14px);justify-content:space-between}.dl-dock a,.dl-dock button{padding:0 8px;min-width:45px}.dl-context-data{display:grid;grid-template-columns:1fr 1fr}.dl-data-chip{text-align:center}.dl-tools-grid{grid-template-columns:1fr}.dl-head-top .dl-badge:nth-child(n+3){display:none}}
@media(prefers-reduced-motion:reduce){.dl-panel,.dl-scrim,.dl-view,.dl-toast,*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.dl-dock,.dl-topic-chip,.dl-scrim,.dl-close,.dl-phases,.dl-nav-actions{display:none!important}.dl-panel{position:static!important;display:block!important;transform:none!important;width:100%!important;box-shadow:none!important}.dl-body{overflow:visible!important;padding:0!important}.dl-head{color:#000;background:#fff;border-bottom:2px solid #000}.dl-head p,.dl-head .dl-badge{color:#000}.dl-card{break-inside:avoid;box-shadow:none}}