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svg{color:var(--accent)}.dropzone-title{color:var(--text);font-weight:600}.dropzone-hint{font-size:13px}.editor-loading{font-family:var(--font-mono);color:var(--text-muted);background:var(--surface-alt);align-items:center;font-size:14px;display:flex}.editor-loading,.preview{min-height:200px;padding:var(--md);border:1px solid var(--border);border-radius:var(--r-sm)}.preview{background:var(--surface);color:var(--text);overflow-wrap:anywhere}.preview>:first-child{margin-top:0}.preview>:last-child{margin-bottom:0}.preview h1,.preview h2,.preview h3{margin:var(--sm) 0;line-height:1.3}.preview p{margin:var(--xs) 0}.preview ol,.preview ul{margin:var(--xs) 0 var(--xs) var(--lg)}.preview a{color:var(--accent)}.preview code{font-family:var(--font-mono);border-radius:4px;padding:1px 5px;font-size:13px}.preview code,.preview pre{background:var(--surface-alt)}.preview pre{padding:var(--md);border-radius:var(--r-sm);overflow-x:auto}.preview pre code{background:0 0;padding:0}.preview blockquote{margin:var(--sm) 0;padding-left:var(--md);border-left:3px solid var(--border);color:var(--text-muted)}.preview table{border-collapse:collapse;margin:var(--sm) 0}.preview td,.preview th{border:1px solid var(--border);padding:var(--xs) var(--sm)}.dialog-wide{width:min(720px,calc(100vw - 2 * var(--md)))}.card-type-toggle{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--r-sm);margin-bottom:var(--md);gap:2px;padding:2px;display:inline-flex}.card-type-toggle button{padding:var(--xs) var(--md);color:var(--text-muted);border-radius:calc(var(--r-sm) - 2px);cursor:pointer;background:0 0;border:none;font-family:inherit;font-size:13px;font-weight:600}.card-type-toggle button.active{background:var(--surface);color:var(--text);box-shadow:var(--sh-sm)}.editor-pane{margin-bottom:var(--md)}.editor-preview-label{color:var(--text-muted);margin:var(--sm) 0 var(--xs);font-size:12px;font-weight:600}.choice-row{align-items:center;gap:var(--sm);margin-bottom:var(--sm);display:flex}.choice-row input[type=radio]{accent-color:var(--accent);flex-shrink:0;width:16px;height:16px}.card-row{justify-content:space-between;align-items:flex-start;gap:var(--md);padding:var(--md);background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);margin-bottom:var(--sm);display:flex}.card-row-body{flex:1;min-width:0}.card-row-front{margin-top:var(--xs);overflow-wrap:anywhere;font-weight:600}.card-row-actions{gap:var(--xs);flex-shrink:0;display:flex}.badge-type{background:var(--surface-alt);color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:11px}.setting-row{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--md) var(--lg);justify-content:space-between;align-items:center;gap:var(--md);display:flex}.setting-input{width:auto;max-width:240px}.setting-tz-control{min-width:0}.setting-tz-control .setting-input{flex:1;min-width:0}.toggle{border-radius:var(--r-full);background:var(--surface-alt);border:1px solid var(--border);cursor:pointer;flex-shrink:0;width:48px;height:28px;transition:background .2s;position:relative}.toggle.on{background:var(--accent);border-color:var(--accent)}.toggle:after{content:"";border-radius:var(--r-full);background:#fff;width:22px;height:22px;transition:transform .2s;position:absolute;top:2px;left:2px}.toggle.on:after{transform:translate(20px)}.toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.study-wrap{text-align:center;max-width:640px;margin:0 auto}.study-progress{color:var(--text-muted);margin-bottom:var(--lg);font-size:13px}.study-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-lg);padding:var(--2xl) var(--xl);justify-content:center;align-items:center;gap:var(--lg);min-height:280px;margin-bottom:var(--lg);flex-direction:column;display:flex}.study-card.flippable{cursor:pointer}.study-card.flippable:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.study-side-label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:var(--xs);font-size:12px;font-weight:600}.study-front{font-size:28px;font-weight:600}.study-question{font-size:22px;font-weight:600}.study-divider{background:var(--border);width:60px;height:1px}.study-back{color:var(--text);font-size:18px;line-height:28px}.study-back code,.study-front code{font-family:var(--font-mono);background:var(--surface-alt);border-radius:4px;padding:2px 6px;font-size:15px}.reveal-hint{color:var(--text-muted);font-size:13px}.study-cloze{font-size:22px;font-weight:500;line-height:38px}.cloze .preview code{font-family:var(--font-mono);background:var(--surface-alt);border:1px solid var(--border);color:var(--text-muted);border-radius:4px;padding:2px 8px;font-size:.85em}.cloze.revealed .preview code{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}.study-choices{gap:var(--sm);width:100%;margin-top:var(--md);flex-direction:column;display:flex}.study-choice{gap:var(--sm);text-align:left;padding:var(--md);border-radius:var(--r-sm);background:var(--surface-alt);color:var(--text);cursor:pointer;font-family:inherit;font-size:16px;transition:border-color .15s,background .15s;display:flex}.choice-letter,.study-choice{align-items:center;border:1px solid var(--border)}.choice-letter{background:var(--surface);width:26px;height:26px;font-family:var(--font-mono);color:var(--text-muted);border-radius:50%;flex-shrink:0;justify-content:center;font-size:13px;font-weight:600;display:inline-flex}.study-choice.correct .choice-letter{background:var(--success);border-color:var(--success);color:var(--on-accent)}.study-choice.wrong .choice-letter{background:var(--error);border-color:var(--error);color:var(--on-accent)}.study-choice:hover:not(:disabled){border-color:var(--accent)}.study-choice:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.study-choice.correct{border-color:var(--success);background:#3a9b6e26}.study-choice.wrong{border-color:var(--error);background:#c8553a1f}.study-choice:disabled{cursor:default}.explanation{text-align:left;background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--r-sm);padding:var(--md);margin-top:var(--md);font-size:15px}.explanation .exp-label{text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);margin-bottom:var(--xs);font-size:12px;font-weight:600}.explanation-toggle{text-align:left;margin-top:var(--md)}.explanation-toggle>.exp-summary{align-items:center;gap:var(--xs);cursor:pointer;padding:var(--sm) var(--md);background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--r-sm);font-size:15px;font-weight:600;list-style:none;display:flex}.explanation-toggle>.exp-summary::-webkit-details-marker{display:none}.explanation-toggle>.exp-summary:before{content:"";border-left:6px solid var(--text-muted);border-top:5px solid #0000;border-bottom:5px solid #0000;flex-shrink:0;width:0;height:0;transition:transform .15s}.explanation-toggle[open]>.exp-summary:before{transform:rotate(90deg)}.explanation-toggle .preview{background:0 0;border:none;border-radius:0;min-height:0;padding:0}.explanation-toggle>.exp-summary .preview>:first-child{margin:0}.explanation-toggle>.explanation{margin-top:calc(-1 * var(--xs));border-top-left-radius:0;border-top-right-radius:0}.grade-row{gap:var(--sm);grid-template-columns:repeat(4,1fr);display:grid}.grade-row.three{grid-template-columns:repeat(3,1fr)}.grade-btn{padding:var(--md) var(--sm);border-radius:var(--r-sm);border:1px solid var(--border);cursor:pointer;color:#fff;flex-direction:column;gap:2px;font-family:inherit;font-size:14px;font-weight:600;display:flex}.grade-btn .interval{opacity:.85;font-size:11px;font-weight:500}.grade-btn:hover:not(:disabled){filter:brightness(1.06)}.grade-btn:focus-visible{outline:2px solid var(--text);outline-offset:2px}.grade-btn:disabled{opacity:.6;cursor:default}.grade-again{background:#be4d34}.grade-hard{background:var(--warning);color:#1b1a17}.grade-good{background:var(--success);color:#1b1a17}.grade-easy{background:var(--accent);color:var(--on-accent)}.study-done{max-width:480px;margin:var(--2xl) auto 0;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-lg);padding:var(--2xl) var(--xl)}@media (max-width:720px){.sidebar{display:none}.app-main{padding:var(--md)}.topbar{align-items:center;gap:var(--sm);background:var(--surface);border-bottom:1px solid var(--border);padding:var(--sm) var(--md);display:flex;overflow-x:auto}.topbar .nav-item{white-space:nowrap;width:auto}.grade-row{grid-template-columns:repeat(2,1fr)}.page-head{gap:var(--sm);flex-wrap:wrap}.setting-row{align-items:stretch;gap:var(--sm);flex-direction:column}.setting-input{max-width:none}.study-front{font-size:24px}}.stat-cards{gap:var(--md);margin-bottom:var(--lg);grid-template-columns:repeat(4,1fr);display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--md)}.stat-label{color:var(--text-muted);font-size:13px}.stat-value{margin-top:var(--xs);font-size:28px;font-weight:700;line-height:1.1}.stat-unit{font-size:15px;font-weight:500}.stat-hint,.stat-unit{color:var(--text-muted)}.stat-hint{margin-top:2px;font-size:12px}.stat-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--lg);margin-bottom:var(--lg)}.stat-section-head{justify-content:space-between;align-items:baseline;gap:var(--sm);margin-bottom:var(--md);flex-wrap:wrap;display:flex}.stat-section-title{font-size:16px;font-weight:700}.stat-section-sub{color:var(--text-muted);font-size:13px}.stat-empty{color:var(--text-muted);font-size:14px}.heatmap{grid-template-rows:repeat(7,1fr);grid-auto-columns:1fr;grid-auto-flow:column;gap:3px;display:grid}.heat{aspect-ratio:1;border-radius:2px;width:100%}.heat,.heat-0{background:var(--surface-alt)}.heat-1{background:var(--accent)}@supports (color:color-mix(in lab,red,red)){.heat-1{background:color-mix(in srgb,var(--accent) 30%,var(--surface-alt))}}.heat-2{background:var(--accent)}@supports (color:color-mix(in lab,red,red)){.heat-2{background:color-mix(in srgb,var(--accent) 55%,var(--surface-alt))}}.heat-3{background:var(--accent)}@supports (color:color-mix(in lab,red,red)){.heat-3{background:color-mix(in srgb,var(--accent) 78%,var(--surface-alt))}}.heat-4{background:var(--accent)}.heatmap-legend{margin-top:var(--sm);color:var(--text-muted);align-items:center;gap:4px;font-size:12px;display:flex}.heatmap-legend .heat{aspect-ratio:auto;width:12px;height:12px}.forecast{gap:var(--xs);flex-direction:column;display:flex}.forecast-row{align-items:center;gap:var(--sm);grid-template-columns:92px 1fr 32px;font-size:13px;display:grid}.forecast-day{color:var(--text-muted);white-space:nowrap}.forecast-bar-track{background:var(--surface-alt);border-radius:var(--r-sm);height:14px;overflow:hidden}.forecast-bar{background:var(--accent);border-radius:var(--r-sm);height:100%;display:block}.forecast-count{text-align:right;font-variant-numeric:tabular-nums;color:var(--text-muted)}@media (max-width:720px){.stat-cards{grid-template-columns:repeat(2,1fr)}}.btn-lg{padding:var(--md) var(--lg);font-size:16px}.landing{max-width:1120px;padding:0 var(--lg);margin:0 auto}.landing-nav{padding:var(--lg) 0;justify-content:space-between;align-items:center;gap:var(--md);display:flex}.landing-brand{color:var(--text);font-size:18px;font-weight:700;text-decoration:none}.landing-brand,.landing-nav-links{align-items:center;gap:var(--sm);display:flex}.landing-hero{align-items:center;gap:var(--2xl);padding:var(--2xl) 0;grid-template-columns:1fr 1fr;display:grid}.landing-hero-title{letter-spacing:-.02em;font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.08}.landing-hero-sub{margin-top:var(--md);color:var(--text-muted);max-width:36ch;font-size:18px;line-height:28px}.landing-hero-cta{gap:var(--sm);margin-top:var(--lg);flex-wrap:wrap;display:flex}.feature-img,.landing-hero-img{border-radius:var(--r-lg);border:1px solid var(--border);width:100%;height:auto;box-shadow:var(--sh-lg)}.landing-features{gap:var(--2xl);padding:var(--2xl) 0;flex-direction:column;display:flex}.feature-row{align-items:center;gap:var(--2xl);grid-template-columns:1fr 1fr;display:grid}.feature-row.reverse .feature-copy{order:2}.feature-eyebrow{text-transform:uppercase;letter-spacing:.06em;font-size:13px;font-weight:700}.feature-eyebrow,[data-theme=dark] .feature-eyebrow{color:var(--accent)}.feature-title{margin-top:var(--xs);font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.15}.feature-body{margin-top:var(--sm);color:var(--text-muted);font-size:16px;line-height:26px}.landing-section-title{text-align:center;font-size:clamp(24px,3vw,32px);font-weight:700}.landing-types{padding:var(--2xl) 0}.type-grid{gap:var(--md);margin-top:var(--lg);grid-template-columns:repeat(3,1fr);display:grid}.type-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--lg);align-items:flex-start;gap:var(--sm);flex-direction:column;display:flex}.type-desc{color:var(--text-muted);font-size:15px;line-height:24px}.landing-cta-band{background:var(--accent-soft);border:1px solid var(--border);border-radius:var(--r-lg);padding:var(--2xl) var(--lg);margin:var(--2xl) 0;text-align:center;align-items:center;gap:var(--md);flex-direction:column;display:flex}.landing-cta-sub{color:var(--text-muted);max-width:48ch;font-size:16px}.landing-footer{justify-content:space-between;align-items:center;gap:var(--md);padding:var(--xl) 0;border-top:1px solid var(--border);color:var(--text-muted);flex-wrap:wrap;font-size:14px;display:flex}.landing-footer-brand{align-items:center;gap:var(--sm);color:var(--text);font-weight:700;display:flex}.landing-footer-links{gap:var(--md);display:flex}.landing-footer-links a{color:var(--text-muted);text-decoration:none}.landing-footer-links a:hover{color:var(--text)}@media (max-width:760px){.feature-row,.landing-hero{gap:var(--lg);padding:var(--xl) 0;grid-template-columns:1fr}.feature-row.reverse .feature-copy{order:0}.type-grid{grid-template-columns:1fr}.landing-footer{flex-direction:column;align-items:flex-start}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}