:root{--bg: oklch(.99 .005 80);--bg-warm: oklch(.975 .008 70);--surface: #ffffff;--ink: oklch(.22 .02 270);--ink-2: oklch(.42 .02 270);--ink-3: oklch(.58 .015 270);--line: oklch(.91 .008 270);--line-2: oklch(.95 .006 270);--primary: oklch(.55 .13 268);--primary-2: oklch(.47 .14 268);--primary-soft: oklch(.96 .025 268);--primary-ink: oklch(.36 .13 268);--pdf: oklch(.62 .18 25);--pdf-soft: oklch(.96 .03 25);--video: oklch(.6 .13 240);--video-soft: oklch(.96 .025 240);--notice: oklch(.72 .13 75);--notice-soft: oklch(.965 .04 80);--notice-ink: oklch(.45 .12 60);--green: oklch(.52 .12 150);--shadow: 0 16px 40px oklch(.2 .02 270 / .08);font-family:Noto Sans KR,Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,textarea,select{font:inherit}button{cursor:pointer}.student-shell{max-width:1100px;margin:0 auto;min-height:100vh;padding:22px clamp(16px,4vw,40px) 48px}.student-shell.narrow{max-width:760px}.student-header,.admin-head,.board-head,.file-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:10px}.brand-mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:800}.brand-name{font-weight:800;letter-spacing:-.01em}.brand-sub,.eyebrow{color:var(--ink-3);font-size:12px;letter-spacing:.07em}.eyebrow{text-transform:uppercase}.small-link{color:var(--primary);font-weight:700;text-decoration:none}.hero{padding:48px 0 24px}.hero h1,.board-head h1,.detail-card h1,.admin-main h1{margin:0;letter-spacing:0;line-height:1.08}.hero h1{font-size:clamp(38px,8vw,76px)}.hero-copy{color:var(--ink-2);font-size:18px;max-width:520px;line-height:1.55}.search-box{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:13px 15px;box-shadow:0 1px 2px #12161f0a}.search-box input{width:100%;border:0;outline:0;background:transparent}.board-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding-top:20px}.board-card{min-height:148px;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:18px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;gap:10px;box-shadow:0 1px 2px #12161f09}.board-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.board-name{font-weight:800;font-size:17px;margin-top:auto}.board-meta{display:inline-flex;align-items:center;gap:5px;color:var(--ink-3);font-size:13px}.mono,.modal-mono{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-weight:800}.mono-1{background:#e3ebff;background:oklch(.94 .04 268);color:#2f4693}.mono-2{background:#ffe3e0;background:oklch(.94 .045 25);color:#9a2929}.mono-3{background:#d4f4e5;color:#005c41;color:oklch(.42 .12 165)}.mono-4{background:#fde8cb;color:#824700;color:oklch(.46 .13 60)}.mono-5{background:#f3e5ff;background:oklch(.94 .04 310);color:#6e3f8d}.mono-6{background:#cff2fe;color:#00566a;color:oklch(.42 .13 220)}.modal-scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#171a247a;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:grid;place-items:center;padding:20px;z-index:20}.modal-card,.login-card{width:min(100%,380px);background:var(--surface);border-radius:20px;padding:28px;box-shadow:0 28px 70px #12161f38}.modal-card{text-align:center}.modal-mono{width:58px;height:58px;margin:0 auto 14px;font-size:22px}.modal-card h2{margin:0}.modal-card p{color:var(--ink-3);margin:6px 0 18px}.password-input,.login-card input,.upload-card input,.upload-card textarea,.upload-card select,.add-board input,.manager-edit input,.manager-edit textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px 13px;background:#fff;outline:none}.password-input:focus,input:focus,textarea:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #516cbd1f}.primary-btn,.primary-inline,.add-board button{border:0;border-radius:10px;background:var(--primary);color:#fff;font-weight:800;padding:12px 16px}.primary-btn{width:100%;margin-top:12px}.text-btn{border:0;background:transparent;color:var(--ink-3);margin-top:10px}.form-error,.error{color:var(--pdf);background:var(--pdf-soft);border:1px solid oklch(.88 .08 25);border-radius:10px;padding:10px 12px;margin:12px 0}.success{color:var(--green);background:#e4f8e7;border:1px solid oklch(.86 .07 150);border-radius:10px;padding:10px 12px;margin:12px 0}.empty{margin:24px 0;padding:28px;border:1px dashed var(--line);border-radius:14px;color:var(--ink-3);background:var(--bg-warm);display:flex;align-items:center;gap:10px}.back-btn{display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;color:var(--primary);font-weight:800;padding:14px 0}.board-head{justify-content:flex-start;padding:12px 0 20px}.board-head p,.detail-date{color:var(--ink-3);margin:6px 0 0}.post-list{display:flex;flex-direction:column;gap:10px}.post-card{width:100%;text-align:left;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:15px 16px;display:flex;flex-direction:column;gap:10px}.post-card.notice{background:var(--notice-soft);border-color:#e9c89b}.post-title-row{display:flex;align-items:center;gap:8px}.post-title{font-weight:800}.notice-pill{display:inline-flex;color:var(--notice-ink);background:#fff3e4;background:oklch(.97 .04 75);border:1px solid oklch(.88 .07 75);border-radius:7px;padding:3px 7px;font-size:11px;font-weight:900}.post-meta{display:flex;align-items:center;justify-content:space-between;color:var(--ink-3);font-size:13px}.file-badge{display:inline-flex;align-items:center;gap:5px;color:var(--primary-ink);background:var(--primary-soft);border-radius:100px;padding:4px 9px;font-weight:800}.detail-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:clamp(20px,4vw,34px)}.detail-card h1{margin-top:10px;font-size:clamp(26px,5vw,42px)}.detail-body{margin-top:22px;line-height:1.75;white-space:pre-wrap;color:var(--ink-2)}.file-head{margin-top:28px;padding-top:20px;border-top:1px solid var(--line-2)}.file-list{display:flex;flex-direction:column;gap:10px;margin-top:12px}.file-row{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:12px}.file-icon{width:46px;height:44px;border-radius:10px;display:grid;place-items:center;font-size:10px;font-weight:900;color:var(--primary);background:var(--primary-soft);flex-shrink:0}.file-icon.pdf{color:var(--pdf);background:var(--pdf-soft)}.file-icon.video{color:var(--video);background:var(--video-soft)}.file-icon.image{color:var(--green);background:#e7f7e9}.file-info{min-width:0;flex:1}.file-name{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-size{color:var(--ink-3);font-size:12px;margin-top:2px}.download-btn{width:40px;height:40px;border:0;border-radius:10px;color:#fff;background:var(--primary)}.admin-login{min-height:100vh;display:grid;place-items:center;padding:20px;background:var(--bg-warm)}.login-card{display:flex;flex-direction:column;gap:14px}.login-card h1{margin:12px 0 0}.login-card label,.upload-card label{display:grid;gap:7px;color:var(--ink-2);font-weight:800}.admin-shell{min-height:100vh;display:grid;grid-template-columns:244px 1fr;background:var(--bg)}.admin-sidebar{border-right:1px solid var(--line);background:#f8faff;background:oklch(.985 .008 270);padding:22px 16px;display:flex;flex-direction:column;gap:10px;position:sticky;top:0;height:100vh}.admin-sidebar .brand{margin-bottom:18px}.admin-sidebar button{border:0;border-radius:9px;background:transparent;color:var(--ink-2);padding:11px 12px;text-align:left;font-weight:800}.admin-sidebar button.active{color:var(--primary-ink);background:var(--primary-soft)}.admin-sidebar .logout{margin-top:auto;display:flex;align-items:center;gap:8px}.admin-main{padding:30px clamp(18px,4vw,42px);overflow:auto}.admin-head{align-items:flex-end;margin-bottom:22px}.primary-inline{display:inline-flex;align-items:center;gap:7px}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:18px}.stats div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.stats span{display:block;color:var(--ink-3);font-size:12px;font-weight:800;text-transform:uppercase}.stats strong{display:block;margin-top:4px;font-size:28px}.add-board{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:18px}.add-board button{display:inline-flex;align-items:center;justify-content:center;gap:7px}.table-card{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse}th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line-2);white-space:nowrap}th{color:var(--ink-3);font-size:12px;text-transform:uppercase;background:#f9fafe}tr:last-child td{border-bottom:0}.mini-mono{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;margin-right:10px;font-weight:900}.board-link{border:0;background:transparent;padding:0;color:var(--ink);font-weight:800;display:inline-flex;align-items:center}.row-actions{display:flex;gap:7px;justify-content:flex-end}.row-actions button,.manager-actions button,.outline-icon{border:1px solid var(--line);background:#fff;border-radius:8px;padding:7px 9px;display:inline-flex;align-items:center;gap:5px}.row-actions .danger,.manager-actions .danger,.outline-icon.danger{color:var(--pdf)}.manager-list{display:grid;gap:12px}.manager-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}.manager-title-row{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.manager-title-row p{color:var(--ink-2);line-height:1.55;margin:8px 0 4px;white-space:pre-wrap}.manager-actions{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;flex-shrink:0}.manager-edit{display:grid;gap:12px}.manager-edit label{display:grid;gap:7px;color:var(--ink-2);font-weight:800}.manager-edit textarea{min-height:120px;resize:vertical}.compact-toggle{padding:10px}.outline-icon{width:40px;height:40px;justify-content:center;flex-shrink:0}.upload-card{display:grid;gap:18px;max-width:760px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.upload-card textarea{min-height:140px;resize:vertical}.toggle-line{display:flex!important;grid-template-columns:auto 1fr;flex-direction:row;align-items:center;gap:10px!important;padding:12px;border:1px solid oklch(.88 .07 75);border-radius:12px;background:var(--notice-soft)}.toggle-line span{display:inline-flex;align-items:center;gap:7px}.drop-zone{border:2px dashed oklch(.85 .04 268);background:var(--primary-soft);border-radius:14px;padding:34px 20px;text-align:center;color:var(--primary-ink);place-items:center}.drop-zone input{display:none}.drop-zone span{color:var(--ink-3);font-weight:500}.chosen-files{display:grid;gap:8px}.chosen-files div{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:10px 12px}.chosen-files span{margin-left:auto;color:var(--ink-3);font-size:12px}.form-actions{display:flex;justify-content:flex-end}@media(max-width:760px){.student-shell{padding-top:18px}.hero{padding:34px 0 20px}.hero h1{font-size:42px}.board-grid{grid-template-columns:1fr}.board-card{min-height:126px}.admin-shell{display:block}.admin-sidebar{position:static;height:auto;flex-direction:row;align-items:center;overflow-x:auto}.admin-sidebar .brand{min-width:190px;margin:0 10px 0 0}.admin-sidebar .logout{margin-left:auto;margin-top:0}.stats,.add-board{grid-template-columns:1fr}.admin-head{align-items:flex-start;flex-direction:column}.row-actions{justify-content:flex-start;flex-wrap:wrap}.manager-title-row{flex-direction:column}.manager-actions{justify-content:flex-start}}