@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.block{display:block}}:root{--ink:#182033;--paper:#f4f0e7;--white:#fffdf8;--blue:#3157d5;--orange:#f06b4e;--sage:#8ca68d;--violet:#7e6aad;--line:#ddd8cd;--muted:#77776f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font-family:Arial,Apple SD Gothic Neo,Noto Sans KR,sans-serif}button,input,textarea,select{font:inherit}button,a,label{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{color:inherit}.app-shell{min-height:100vh;display:flex}.sidebar{background:var(--ink);color:#f7f3e9;z-index:10;flex-direction:column;width:236px;padding:28px 22px 24px;display:flex;position:fixed;inset:0 auto 0 0}.brand,.mobile-brand{letter-spacing:-.5px;align-items:center;gap:11px;font-size:18px;font-weight:800;display:flex}.brand-mark{background:var(--orange);color:#fff;border-radius:9px;place-items:center;width:32px;height:32px;font-family:Georgia,serif;font-size:20px;font-style:italic;display:grid;box-shadow:4px 4px #8e3524}.nav{gap:6px;margin-top:52px;display:grid}.nav-item{color:#aeb3bf;border-radius:9px;align-items:center;gap:13px;padding:12px 13px;font-size:14px;font-weight:700;transition:all .18s;display:flex}.nav-item span{text-align:center;width:20px;font-size:16px}.nav-item:hover,.nav-item.active{color:#fff;background:#293147;transform:translate(2px)}.nav-item.active{box-shadow:inset 3px 0 var(--orange)}.sidebar-bottom{gap:16px;margin-top:auto;display:grid}.streak-mini{background:#222a3e;border:1px solid #3b4356;border-radius:12px;align-items:center;gap:11px;padding:14px;display:flex}.streak-icon{color:#ffd15b;font-size:21px}.streak-mini div,.profile span:nth-child(2){gap:3px;display:grid}.streak-mini strong,.profile strong{font-size:13px}.streak-mini small,.profile small{color:#8991a2;font-size:10px}.profile{color:#fff;text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;padding:5px 2px;display:grid}.avatar{width:34px;height:34px;color:var(--ink);background:#d9dcc5;border-radius:50%;place-items:center;font-weight:800;display:grid}.workspace{width:calc(100% - 236px);min-width:0;margin-left:236px}.topbar{border-bottom:1px solid var(--line);z-index:8;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f4f0e7f0;justify-content:space-between;align-items:center;height:72px;padding:0 4.5%;display:flex;position:sticky;top:0}.mobile-brand{display:none}.search{color:#898982;align-items:center;gap:8px;width:min(360px,42vw);display:flex}.search span{font-size:22px}.search input{background:0 0;border:0;outline:0;width:100%;font-size:13px}.top-actions{align-items:center;gap:12px;display:flex}.local-badge{color:#73756d;font-size:11px}.top-actions button{border:1px solid var(--line);background:var(--white);cursor:pointer;border-radius:50%;width:34px;height:34px}.content{width:min(1180px,91%);margin:0 auto;padding:54px 0 30px}.welcome{grid-template-columns:1.55fr .8fr;align-items:end;gap:60px;padding:8px 0 42px;display:grid}.eyebrow,.section-kicker{color:var(--blue);letter-spacing:2.2px;margin:0 0 13px;font-size:10px;font-weight:900;line-height:1}.welcome h1{letter-spacing:-3.8px;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(48px,5.7vw,76px);font-weight:500;line-height:.98}.welcome h1 em,.quiz-intro h2 em{color:var(--orange);font-weight:inherit}.welcome-copy{color:#6e6d67;margin:24px 0 0;font-size:14px;line-height:1.8}.focus-card{background:var(--ink);color:#fff;border-radius:16px 16px 4px;padding:22px;box-shadow:10px 10px #d9d2c4}.focus-head{color:#bac0cd;justify-content:space-between;align-items:center;font-size:11px;display:flex}.focus-tag{color:#dce0e9;border:1px solid #424a5e;border-radius:20px;padding:5px 8px}.timer{letter-spacing:1px;margin:18px 0 14px;font-family:Georgia,serif;font-size:44px;font-weight:400;display:block}.progress-track{background:#3e4659;height:3px;overflow:hidden}.progress-track span{background:var(--orange);height:100%;transition:width .5s;display:block}.focus-button{width:100%;color:var(--ink);cursor:pointer;background:#fffdf8;border:0;border-radius:8px;margin-top:20px;padding:12px;font-size:12px;font-weight:800}.focus-button span{color:var(--orange);margin-right:8px}.quick-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:38px;display:grid}.action-card{border:1px solid var(--line);background:var(--white);cursor:pointer;grid-template-columns:38px 1fr auto;align-items:center;gap:14px;min-height:116px;padding:19px;transition:transform .16s,box-shadow .16s;display:grid}.action-card:hover{transform:translateY(-3px);box-shadow:0 10px 28px #18203314}.action-icon{width:38px;height:38px;color:var(--blue);background:#e8edf9;border-radius:50%;place-items:center;font-size:19px;font-weight:600;display:grid}.note-action .action-icon{color:var(--orange);background:#f8e9e3}.quiz-action .action-icon{color:#658065;background:#e8eee6}.action-card>span:nth-child(2){display:grid}.action-card small{color:#96948d;letter-spacing:1.3px;font-size:8px;font-weight:900}.action-card strong{margin:5px 0;font-size:14px}.action-card em{color:#89877f;font-size:10px;font-style:normal}.action-arrow{color:#8e8d86}.main-grid{grid-template-columns:1.22fr .78fr;gap:14px;display:grid}.panel{background:var(--white);border:1px solid var(--line);padding:25px;scroll-margin-top:90px}.panel-heading{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.panel-heading h2{margin:0;font-family:Georgia,serif;font-size:24px;font-weight:500}.panel-heading button{color:var(--blue);cursor:pointer;background:0 0;border:0;font-size:11px;font-weight:800}.material-list{display:grid}.material-row{text-align:left;cursor:pointer;background:0 0;border:0;border-top:1px solid #ebe7de;border-radius:6px;grid-template-columns:43px 1fr auto;align-items:center;gap:13px;width:100%;padding:11px 9px;display:grid}.material-row:hover,.material-row.selected{background:#f5f2ea}.file-tile{color:#fff;letter-spacing:.7px;border-radius:3px 8px 3px 3px;place-items:center;width:41px;height:48px;font-size:8px;font-weight:900;display:grid;box-shadow:inset 0 -9px #00000014}.file-tile.blue{background:var(--blue)}.file-tile.orange{background:var(--orange)}.file-tile.sage{background:var(--sage)}.file-tile.violet{background:var(--violet)}.material-name{gap:5px;min-width:0;display:grid}.material-name strong{white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.material-name small{color:#8b8982;font-size:10px}.material-more{color:#9b9991}.storage-note{color:#97958e;border-top:1px solid #ebe7de;margin:14px 0 0;padding-top:13px;font-size:9px}.saved-state{color:#728473;font-size:9px}.note-panel textarea{resize:vertical;width:100%;min-height:202px;color:var(--ink);box-shadow:inset 4px 0 var(--orange);background:#f2eee4;border:0;outline:0;padding:18px;font-size:12px;line-height:1.8}.note-panel textarea::placeholder{color:#aaa79e}.note-footer{color:#96948d;justify-content:space-between;margin-top:11px;font-size:9px;display:flex}.note-footer small{border:1px solid #d7d1c5;border-radius:10px;margin-left:5px;padding:2px 5px}.quiz-section{background:#dde4d8;border:1px solid #cbd3c7;grid-template-columns:.7fr 1.3fr;align-items:center;gap:clamp(35px,7vw,88px);margin-top:14px;padding:clamp(28px,5vw,56px);scroll-margin-top:86px;display:grid}.quiz-intro h2{letter-spacing:-1.6px;margin:0;font-family:Georgia,serif;font-size:clamp(32px,3.5vw,45px);font-weight:500;line-height:1.05}.quiz-intro>p:not(.section-kicker){color:#687065;margin:18px 0 24px;font-size:12px;line-height:1.7}.quiz-intro label{gap:7px;display:grid}.quiz-intro label>span{color:#6a7468;font-size:9px;font-weight:800}.quiz-intro select{width:100%;color:var(--ink);background:#edf1e9;border:1px solid #bcc6b7;border-radius:5px;outline:0;padding:11px 12px;font-size:11px}.primary-button{background:var(--ink);color:#fff;cursor:pointer;border:0;border-radius:5px;justify-content:space-between;align-items:center;width:100%;margin-top:10px;padding:13px 14px;font-size:11px;font-weight:800;display:flex}.primary-button:hover{background:var(--blue)}.quiz-card{background:var(--white);border-radius:4px;padding:clamp(24px,4vw,38px);box-shadow:13px 13px #495b482e}.quiz-meta{color:#8c8b84;justify-content:space-between;font-size:9px;font-weight:800;display:flex}.quiz-card h3{margin:24px 0;font-family:Georgia,serif;font-size:clamp(19px,2.2vw,26px);font-weight:500;line-height:1.4}.options{grid-template-columns:1fr 1fr;gap:8px;display:grid}.option{text-align:left;cursor:pointer;background:#fff;border:1px solid #dedad1;border-radius:5px;align-items:center;gap:10px;padding:11px;font-size:11px;display:flex}.option span{border:1px solid #d8d3ca;border-radius:50%;place-items:center;width:23px;height:23px;font-family:Georgia,serif;font-size:10px;display:grid}.option:hover,.option.chosen{border-color:var(--blue);background:#f0f3fb}.option.correct{background:#eef5ec;border-color:#5d8b64}.option.correct span{color:#fff;background:#5d8b64;border-color:#5d8b64}.option.wrong{border-color:var(--orange);background:#fdf0ec}.quiz-footer{justify-content:space-between;align-items:center;margin-top:18px;display:flex}.hint-button{color:#7b7a74;cursor:pointer;background:0 0;border:0;padding:0;font-size:10px;text-decoration:underline}.result-correct,.result-wrong{font-size:11px}.result-correct{color:#5d8061}.result-wrong{color:var(--orange)}.hint{color:#767168;background:#fbf7e7;border-left:3px solid #d9b953;margin:14px 0 0;padding:10px 12px;font-size:10px;line-height:1.5}footer{color:#8b8981;grid-template-columns:1fr auto 1fr;align-items:center;padding:28px 0 0;font-size:9px;display:grid}footer span:first-child{color:var(--ink);font-weight:900}footer span:last-child{text-align:right}.toast{z-index:30;background:var(--ink);color:#fff;border-radius:8px;padding:14px 18px;font-size:12px;animation:.22s ease-out toast-in;position:fixed;bottom:28px;right:28px;box-shadow:0 15px 40px #0000002e}.visually-hidden{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes toast-in{0%{opacity:0;transform:translateY(8px)}}@media (max-width:900px){.sidebar{width:76px;padding:25px 13px}.brand{justify-content:center}.brand>span:last-child,.nav-item:not(.active):after,.nav-item{font-size:0}.nav-item{justify-content:center;padding:12px}.nav-item span{font-size:17px}.streak-mini,.profile span:nth-child(n+2){display:none}.profile{justify-content:center;display:flex}.workspace{width:calc(100% - 76px);margin-left:76px}.welcome{grid-template-columns:1.25fr .75fr;gap:28px}.quick-grid{grid-template-columns:1fr}.action-card{min-height:86px}.main-grid{grid-template-columns:1fr}}@media (max-width:640px){.sidebar{display:none}.workspace{width:100%;margin-left:0}.topbar{height:64px;padding:0 18px}.mobile-brand{font-size:15px;display:flex}.mobile-brand .brand-mark{width:28px;height:28px;font-size:16px}.search{width:auto;margin-left:auto}.search input,.local-badge{display:none}.content{width:calc(100% - 32px);padding-top:34px}.welcome{grid-template-columns:1fr}.welcome h1{letter-spacing:-2.7px;font-size:49px}.welcome-copy br{display:none}.focus-card{max-width:100%}.quick-grid{margin-bottom:16px}.action-card{grid-template-columns:38px 1fr auto}.panel{padding:20px 15px}.main-grid{gap:10px}.quiz-section{grid-template-columns:1fr;gap:30px;padding:30px 20px}.options{grid-template-columns:1fr}footer{grid-template-columns:1fr auto}footer span:nth-child(2){display:none}.toast{text-align:center;bottom:16px;left:16px;right:16px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}