:root{--bg:#f5f6f3;--surface:#fff;--text:#1b201d;--text-muted:#5e6661;--border:#dadfd8;--border-strong:#b9c0b9;--accent:#24463b;--accent-ink:#f5f6f3;--chalk:#f2c94c;--board:#24463b;--on-board:#f5f6f3;--pill:#1b201d0f;--danger:#b3261e;--display:"Hahmlet", "AppleMyungjo", "Noto Serif KR", serif;--sans:"IBM Plex Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", system-ui, sans-serif;--step--1:13px;--step-0:16px;--step-1:20px;--step-2:25px;--step-3:31px;font:400 var(--step-0)/1.6 var(--sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#151916;--surface:#1e2320;--text:#eceeea;--text-muted:#a3aaa5;--border:#323935;--border-strong:#4a524d;--accent:#9fcfb3;--accent-ink:#122019;--board:#1b3129;--pill:#eceeea14;--danger:#ff8a7e}}*{box-sizing:border-box}body{background:var(--bg);word-break:keep-all;margin:0}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--text);outline-offset:2px;box-shadow:0 0 0 5px var(--chalk)}h1{font:700 var(--step-3)/1.25 var(--display);letter-spacing:-.01em;margin:0 0 16px}h2{margin:0 0 8px;font-size:15px;font-weight:600}.muted{color:var(--text-muted)}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.site-header{justify-content:space-between;align-items:center;gap:16px;max-width:1200px;min-height:64px;margin:0 auto;padding:0 24px;display:flex}@media (width<=640px){.site-header{flex-wrap:wrap;gap:8px 12px;min-height:56px;padding:10px 16px}}.site-header-wrap{border-bottom:1px solid var(--border)}.site-logo{font:700 19px/1 var(--display);white-space:nowrap;align-items:center;gap:10px;display:inline-flex}@media (width<=640px){.site-logo{white-space:normal;word-break:keep-all;gap:8px;min-width:0;font-size:15px;line-height:1.15}}.site-logo svg{flex:none;width:26px;height:26px}.header-actions{align-items:center;gap:12px;display:flex}@media (width<=640px){.header-actions{flex-wrap:wrap;justify-content:flex-end;gap:4px;max-width:100%;margin-left:auto}}main{max-width:1200px;margin:0 auto;padding:40px 24px 80px}@media (width<=640px){main{padding:28px 16px 64px}}main:has(>.home){max-width:none;padding:0}.container{max-width:1200px;margin:0 auto;padding-inline:24px}@media (width<=640px){.container{padding-inline:16px}}.site-footer{border-top:1px solid var(--border)}.site-footer .site-logo{font-family:var(--sans);font-weight:600}.site-footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 32px;padding-top:28px;padding-bottom:40px;display:flex}.site-footer-inner p{max-width:60ch;margin:0;font-size:14px}.gate{text-align:center;justify-items:center;gap:4px;max-width:480px;margin:48px auto;display:grid}.gate p{margin:0 0 16px}.gate-actions{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.button{background:var(--accent);min-height:36px;color:var(--accent-ink);font:inherit;white-space:nowrap;cursor:pointer;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:0 16px;font-size:14px;font-weight:500;display:inline-flex}.button:hover{background:color-mix(in srgb, var(--accent) 88%, var(--text))}.button:disabled{opacity:.5;cursor:default}.button-secondary{color:var(--text);border-color:var(--border-strong);background:0 0}.button-secondary:hover{background:var(--pill)}.button-plain{color:var(--text-muted);background:0 0}.button-plain:hover{background:var(--pill);color:var(--text)}.button-danger,.button-danger-solid{background:var(--danger);color:#fff}.button-danger:hover,.button-danger-solid:hover{background:color-mix(in srgb, var(--danger) 85%, #000)}.button-plain.button-danger-text,.button-danger-text{color:var(--danger)}.button-large{min-height:44px;padding:0 24px;font-size:15px}.login,.user-menu{flex-wrap:wrap;align-items:center;gap:8px;display:inline-flex}.user-menu{flex-wrap:nowrap}.login-error{color:var(--danger);font-size:14px}.avatar{border-radius:50%;width:28px;height:28px}.avatar-initial{background:var(--accent);color:var(--accent-ink);place-items:center;font-size:13px;font-weight:600;display:grid}.user-link{border-radius:999px;align-items:center;gap:8px;min-height:36px;padding:0 10px 0 4px;font-weight:500;display:inline-flex}.user-link:hover{background:var(--pill)}.user-link.active{background:var(--pill);box-shadow:inset 0 0 0 1px var(--border-strong)}.user-link .tab-count{margin-left:0}@media (width<=640px){.user-link{padding:0 4px}}.user-name{font-size:14px}@media (width<=640px){.user-name{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}}.admin-link{align-items:center;gap:4px;display:inline-flex}@media (width<=640px){.header-logout{display:none}}.my-head{justify-content:space-between;align-items:baseline;gap:16px;display:flex}.my-logout{display:none}@media (width<=640px){.my-logout{display:inline-flex}}.fields{gap:20px;display:grid}.field{gap:6px;font-size:14px;font-weight:600;display:grid}.field small{font-weight:400}.field-row{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;display:grid}input,select,textarea{font:inherit;color:inherit;border:1px solid var(--border-strong);background:var(--surface);border-radius:8px;width:100%;min-height:40px;padding:8px 12px;font-weight:400}input:focus-visible,select:focus-visible,textarea:focus-visible{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--chalk) 70%, transparent);outline:none}textarea{resize:vertical;line-height:1.6}.field-hint,.field-error{font-size:var(--step--1);margin:0;font-weight:400}.field-error{color:var(--danger)}.tabs{background:var(--pill);border-radius:10px;gap:2px;margin-bottom:8px;padding:3px;display:inline-flex}.tabs button{cursor:pointer;color:var(--text-muted);font:inherit;font-size:var(--step--1);background:0 0;border:none;border-radius:7px;padding:5px 14px;font-weight:500}.tabs button[aria-selected=true]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px #0000001f}.tabs-large{border-bottom:1px solid var(--border);background:0 0;border-radius:0;gap:24px;margin-bottom:28px;padding:0;display:flex}.tabs-large button{border-radius:0;padding:10px 0;font-size:15px;position:relative}.tabs-large button[aria-selected=true]{box-shadow:none;background:0 0}.tabs-large button[aria-selected=true]:after{content:"";background:var(--accent);height:2px;position:absolute;bottom:-1px;left:0;right:0}.tab-count{background:var(--chalk);color:#1b201d;text-align:center;border-radius:999px;min-width:18px;margin-left:6px;padding:0 5px;font-size:11px;font-weight:600;line-height:18px;display:inline-block}.drop-area{border:1.5px dashed var(--border-strong);background:var(--surface);text-align:center;border-radius:10px;justify-items:center;gap:10px;padding:32px 16px;font-weight:400;display:grid}.drop-area p{margin:0}.drop-area.dragging{border-style:solid;border-color:var(--accent);background:color-mix(in srgb, var(--accent) 8%, var(--surface))}.code-input{min-height:220px;font:13px/1.55 ui-monospace,SFMono-Regular,Menlo,monospace}.chips{border:1px solid var(--border-strong);background:var(--surface);border-radius:8px;flex-wrap:wrap;gap:6px;padding:6px;display:flex}.chips:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--chalk) 70%, transparent)}.chips input{background:0 0;border:none;flex:1;min-width:180px;min-height:0;padding:4px}.chips input:focus-visible{box-shadow:none}.chip{background:var(--pill);font-size:var(--step--1);border-radius:999px;align-items:center;gap:4px;padding:2px 4px 2px 10px;font-weight:400;display:inline-flex}.chip button{cursor:pointer;width:20px;height:20px;color:var(--text-muted);background:0 0;border:none;border-radius:50%;padding:0;font-size:15px;line-height:1}.chip button:hover{background:var(--pill)}.page-id-input{border:1px solid var(--border-strong);background:var(--surface);border-radius:8px;align-items:stretch;display:flex;overflow:hidden}.page-id-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--chalk) 70%, transparent)}.page-id-input[data-status=available]{border-color:var(--accent)}.page-id-input[data-status=invalid],.page-id-input[data-status=taken]{border-color:var(--danger)}.page-id-input input{min-width:0;box-shadow:none;border:none;border-radius:0;flex:1;padding-left:2px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.page-id-input input:focus-visible{box-shadow:none}.page-id-prefix{color:var(--text-muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:var(--step--1);white-space:nowrap;align-items:center;padding-left:12px;font-weight:400;display:flex}@media (width<=640px){.page-id-host{display:none}}.page-id-status{min-height:1.5em}.page-id-status p{margin:0}.field-ok{color:var(--accent);font-size:var(--step--1);font-weight:500}.page-id-taken{gap:6px;display:grid}.page-id-suggestions{font-size:var(--step--1);flex-wrap:wrap;align-items:center;gap:6px;font-weight:400;display:flex}.chip-button{cursor:pointer;border:none;border:1px solid var(--border-strong);background:0 0;background:var(--surface);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:var(--step--1);cursor:pointer;border-radius:999px;padding:2px 10px}.chip-button:hover,.chip-button:focus-visible{border-color:var(--accent);color:var(--accent)}.button-inline{min-height:0;font-size:inherit;padding:0 4px;text-decoration:underline}.notice-inline{background:color-mix(in srgb, var(--chalk) 22%, transparent);color:var(--text);border-radius:8px;padding:8px 12px;line-height:1.5}.editor{grid-template-columns:minmax(0,420px) minmax(0,1fr);align-items:start;gap:48px;display:grid}@media (width<=900px){.editor{grid-template-columns:minmax(0,1fr);gap:40px}}.editor-form{gap:24px;display:grid}.editor-form h1{margin:0}.editor-form>.button{justify-self:start;min-height:44px;padding:0 24px;font-size:15px}.editor-fields{border:0;gap:24px;min-width:0;margin:0;padding:0;display:grid}.editor-side{align-content:start;gap:40px;display:grid}.editor-preview{position:sticky;top:24px}.editor-preview>h2{margin-bottom:12px}.editor-preview .preview-window{--frame-height:min(70vh, 720px)}@media (width<=900px){.editor-preview{position:static}}.preview-empty{border:1.5px dashed var(--border-strong);text-align:center;border-radius:12px;place-items:center;height:min(70vh,720px);padding:16px;display:grid}.notice{background:color-mix(in srgb, var(--accent) 12%, var(--bg));border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;padding:14px 18px;display:flex}.notice p{margin:0}.notice-warning{background:color-mix(in srgb, var(--chalk) 28%, var(--bg))}.role-notice{margin-bottom:24px}.notice-actions,.form-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.form-actions .button:first-child{min-height:44px;padding:0 24px;font-size:15px}.form-actions>button:last-of-type:not(:first-child){margin-left:auto}.badges{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.badge{background:var(--pill);color:var(--text-muted);border-radius:999px;padding:1px 8px;font-size:12px;font-weight:500}.subject-tag{align-items:center;gap:6px;font-size:14px;font-weight:600;display:inline-flex}.subject-tag:before{content:"";background:var(--cover);border-radius:1px 3px 3px 1px;width:10px;height:14px}.viewer{gap:24px;display:grid}.viewer-head{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:16px 32px;display:flex}.viewer-head h1{margin:6px 0 0}.viewer-actions{flex-wrap:wrap;gap:8px;display:flex}.viewer-info{grid-template-columns:minmax(0,1fr) minmax(220px,320px);align-items:start;gap:16px 48px;padding-top:8px;display:grid}@media (width<=900px){.viewer-info{grid-template-columns:minmax(0,1fr)}}.description{white-space:pre-line;max-width:68ch;margin:0}.viewer-meta{grid-template-columns:auto 1fr;gap:8px 20px;margin:0;font-size:14px;display:grid}.viewer-meta dt{color:var(--text-muted)}.viewer-meta dd{margin:0}.author-list{margin:0;padding:0;list-style:none}.full-frame{background:#fff;border:none;width:100vw;height:100dvh;display:block}.hero{background:var(--board);color:var(--on-board)}.hero h1{letter-spacing:-.02em;margin:0 0 20px;font-size:clamp(34px,4.6vw,52px);line-height:1.2}@media (width<=640px){.hero h1{text-wrap:balance;font-size:30px}.hero h1 br{display:none}}.hero-inner{grid-template-columns:minmax(0,1fr) minmax(260px,340px);align-items:center;gap:40px 64px;padding-top:72px;padding-bottom:80px;display:grid}@media (width<=900px){.hero-inner{grid-template-columns:minmax(0,1fr);padding-top:48px;padding-bottom:56px}}.hero-lede{max-width:44ch;color:color-mix(in srgb, var(--on-board) 78%, transparent);margin:0 0 32px;font-size:17px}@media (width<=640px){.hero-lede{font-size:16px}}.search{background:#fff;border-radius:12px;gap:8px;max-width:560px;padding:6px;display:flex;box-shadow:0 10px 30px #00000038}.search:focus-within{box-shadow:0 0 0 3px var(--chalk), 0 10px 30px #00000038}.search input{color:#1b201d;background:0 0;border:none;min-height:48px;padding:0 12px;font-size:16px}.search input::placeholder{color:#6b736e}.search input:focus-visible{box-shadow:none}.search .button{background:var(--chalk);color:#1b201d;min-height:48px;padding:0 24px;font-size:15px;font-weight:600}.search .button:hover{background:color-mix(in srgb, var(--chalk) 88%, #000)}@media (width<=640px){.search .button{padding:0 16px}}.board{color:#1b201d;background:#f5f6f3;border-radius:4px;gap:18px;padding:24px;display:grid;rotate:1deg;box-shadow:0 14px 30px #00000047}@media (width<=900px){.board{rotate:none}}.board-total{border-bottom:1px solid #dadfd8;align-items:baseline;gap:10px;margin:0;padding-bottom:14px;display:flex}.board-total strong{font:800 48px/1 var(--display)}.board-total span{color:#5e6661;font-size:14px}.board-bars{gap:4px;margin:0;padding:0;list-style:none;display:grid}.board-bars button{cursor:pointer;width:100%;color:inherit;font:inherit;text-align:left;background:0 0;border:none;border-radius:6px;grid-template-columns:64px minmax(0,1fr) auto;align-items:center;gap:10px;padding:5px 6px;font-size:14px;display:grid}.board-bars button:hover{background:#1b201d0f}.board-bar{background:var(--cover);border-radius:1px 3px 3px 1px;min-width:6px;height:10px}.board-count{color:#5e6661;font-size:var(--step--1);font-variant-numeric:tabular-nums}.browse{grid-template-columns:minmax(0,1fr);gap:20px;padding-top:56px;padding-bottom:80px;scroll-margin-top:16px;display:grid}.browse h2{font:700 var(--step-3)/1.25 var(--display);letter-spacing:-.01em;margin:0}.browse .grid{margin-top:16px}@media (width<=640px){.browse{padding-top:40px}}.browse-head{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:12px;display:flex}.result-count{min-height:1.6em;margin:4px 0 0;font-size:14px}.sort select{width:auto;min-height:36px;padding:4px 32px 4px 12px;font-size:14px}.status-line{margin:24px 0 0}.filters{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px;display:flex}.chip-group{flex-wrap:wrap;gap:6px;display:flex}@media (width<=640px){.filters .chip-group{scrollbar-width:none;flex-wrap:nowrap;margin:0 -16px;padding:2px 16px 6px;overflow-x:auto}}.filter-chip{border:1px solid var(--border);background:var(--surface);min-height:32px;color:var(--text);font:inherit;white-space:nowrap;cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:0 12px;font-size:14px;display:inline-flex}.filter-chip:hover{border-color:var(--border-strong)}.filter-chip[aria-pressed=true]{border-color:var(--text);background:var(--text);color:var(--bg)}.filter-chip.has-cover:before{content:"";background:var(--cover);border-radius:50%;width:8px;height:8px}.filter-chip.has-cover[aria-pressed=true]{border-color:var(--cover);background:var(--cover);color:#fff}.filter-chip.has-cover[aria-pressed=true]:before{background:#fff}.chip-count{color:var(--text-muted);font-variant-numeric:tabular-nums;font-size:12px}.filter-chip[aria-pressed=true] .chip-count{color:inherit;opacity:.8}.segmented{background:var(--pill);border-radius:10px;gap:2px;padding:3px;display:inline-flex}.segmented button{cursor:pointer;color:var(--text-muted);font:inherit;background:0 0;border:none;border-radius:7px;min-height:28px;padding:0 14px;font-size:14px}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px #0000001f}.grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:40px 24px;display:grid}@media (width<=640px){.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 14px}}.card{flex-direction:column;gap:12px;min-width:0;display:flex}.cover{aspect-ratio:4/3;background:var(--cover);color:#fff;border-radius:3px 10px 10px 3px;grid-template-rows:auto 1fr;padding:16px 18px 14px 26px;transition:translate .15s ease-out,box-shadow .15s ease-out;display:grid;position:relative;overflow:hidden;box-shadow:inset 10px 0 #00000029,inset 11px 0 #ffffff1f,0 1px 2px #0000001f}@media (prefers-reduced-motion:reduce){.cover{transition:none}}@media (width<=640px){.cover{padding:12px 12px 10px 20px}}.cover-school{opacity:.85;font-size:12px;font-weight:500}.cover-subject{font:800 var(--step-2)/1.15 var(--display);letter-spacing:-.01em}@media (width<=640px){.cover-subject{font-size:var(--step-1)}}.cover-grade{font:800 76px/1 var(--display);opacity:.92;position:absolute;bottom:2px;right:14px}.cover-grade small{margin-left:2px;font-size:15px;font-weight:700}@media (width<=640px){.cover-grade{font-size:56px}}.card-link{gap:14px;display:grid}.card-link:hover .cover{translate:0 -3px;box-shadow:inset 10px 0 #00000029,inset 11px 0 #ffffff1f,0 8px 18px #00000024}@media (prefers-reduced-motion:reduce){.card-link:hover .cover{translate:none}}.card-link:hover h3{text-underline-offset:3px;text-decoration:underline}.card-body{gap:4px;display:grid}.card-body h3{-webkit-line-clamp:2;font-size:var(--step-0);-webkit-box-orient:vertical;margin:0;font-weight:600;line-height:1.45;display:-webkit-box;overflow:hidden}.card-desc{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:14px;line-height:1.55;display:-webkit-box;overflow:hidden}.card-meta{font-size:var(--step--1);flex-wrap:wrap;justify-content:space-between;gap:0 12px;margin:0;display:flex}.card-actions{flex-wrap:wrap;gap:6px;margin-top:auto;display:flex}.card-actions .button{min-height:30px;font-size:var(--step--1);padding:0 10px}.card-actions .button-plain{padding:0 8px}.empty{border:1.5px dashed var(--border);text-align:center;border-radius:12px;justify-items:center;gap:16px;padding:64px 16px;display:grid}.empty p{margin:0}.panel{border:1px solid var(--border);background:var(--surface);border-radius:12px;gap:14px;padding:20px;display:grid}.panel h2{font:700 var(--step-1)/1.3 var(--display);margin:0}.panel h3{margin:4px 0 0;font-size:14px}.panel>.button,.invite-form>.button{justify-self:start}.people{gap:10px;margin:0;padding:0;list-style:none;display:grid}.people li{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px 8px;display:flex}.people .button{min-height:28px;font-size:var(--step--1);padding:0 8px}.person{flex-wrap:wrap;align-items:center;gap:4px 6px;min-width:0;font-size:14px;display:flex}.person small{overflow-wrap:anywhere}.person-actions{gap:4px;display:flex}.invite-form{border-top:1px solid var(--border);gap:10px;padding-top:14px;display:grid}.request-form{text-align:left;gap:12px;width:100%;display:grid}.request-form .button{justify-self:center}.teacher-list li{border-bottom:1px solid var(--border);padding:12px 0}.teacher-list .field-error{flex-basis:100%}.dialog{background:var(--surface);width:min(420px,100vw - 32px);color:var(--text);border:none;border-radius:14px;padding:24px;box-shadow:0 24px 64px #00000047}.dialog::backdrop{background:#15191673}.dialog h2{font:700 var(--step-1)/1.35 var(--display);margin-bottom:12px}.dialog-message p{margin:0 0 20px}.dialog-actions{justify-content:flex-end;gap:8px;display:flex}.qr-dialog{width:min(440px,100vw - 32px)}.qr-sheet{color:#1b201d;text-align:center;background:#fff;border-radius:12px;justify-items:center;gap:4px;margin-bottom:16px;padding:16px;display:grid}.qr-sheet p{margin:0}.qr-sheet.is-big{z-index:10;position:fixed;inset:0}:is(.qr-sheet:fullscreen,.qr-sheet.is-big){cursor:zoom-out;border-radius:0;align-content:center;gap:1.5vmin;margin:0}:is(.qr-sheet:fullscreen .qr-code,.qr-sheet.is-big .qr-code){width:min(72vmin,100%)}:is(.qr-sheet:fullscreen .qr-title,.qr-sheet.is-big .qr-title){font-size:clamp(20px,4.5vmin,56px)}:is(.qr-sheet:fullscreen .qr-url,.qr-sheet.is-big .qr-url){font-size:clamp(14px,2.6vmin,32px)}.qr-code{aspect-ratio:1;width:min(280px,100%);height:auto;display:block}.qr-title{font-weight:700;font-size:var(--step-0);overflow-wrap:anywhere}.qr-url{color:#5b625e;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:var(--step--1);overflow-wrap:anywhere}.qr-exit{color:#5b625e;margin-top:2vmin!important}.qr-actions{flex-wrap:wrap}
