:root{color-scheme:light;--ink:#343647;--muted:#858694;--purple:#8271ac;--purple-dark:#6c5a98;--border:#e9e7ef;--paper:#fff;--page:#faf9fc;--red:#ba6572;--mint:#6e9889}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:15px/1.6 -apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Noto Sans KR',sans-serif;letter-spacing:-.3px}button,input,select{font:inherit}a,button,input,select{-webkit-tap-highlight-color:transparent}button{border:0;background:none;color:inherit;cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit;text-decoration:none}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1{font-size:34px;line-height:1.3;letter-spacing:-1.5px}h2{font-size:21px;letter-spacing:-.7px}h3{font-size:18px;letter-spacing:-.5px}button:focus-visible,a:focus-visible{outline:3px solid #cabce1;outline-offset:3px}input,select{border:1px solid #e1dfe8;border-radius:12px;background:#fff;min-height:48px;padding:11px 14px;color:var(--ink);max-width:100%}input:focus,select:focus{outline:2px solid #d9cfea;border-color:#ad9bc8}label{display:block;font-size:13px;font-weight:650;margin:18px 0 8px}
.site-header{max-width:1264px;margin:auto;padding:28px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:750;letter-spacing:-.8px}.brand:before{content:'';width:5px;height:34px;border-radius:4px;background:#bfafd8}.brand small{display:block;color:#9b91a9;font-size:11px;letter-spacing:.4px;font-weight:500;margin-top:2px}.site-header nav,.account{display:flex;align-items:center;gap:16px}.account>span{font-size:13px;color:var(--muted)}.text-button{padding:8px 5px;color:var(--muted);font-size:13px;white-space:nowrap}.text-button:hover{color:var(--purple-dark)}main{max-width:1200px;padding:0 28px 40px;margin:25px auto}.eyebrow{color:#9a8bad;font-size:11px;letter-spacing:1px;font-weight:650}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin:8px 0 23px}.page-heading h1{margin-top:7px}.muted{color:var(--muted);font-size:12px;line-height:1.6}.primary-button,.download-button,.cancel-button,.danger-button{display:inline-flex;align-items:center;justify-content:center;min-height:45px;padding:12px 20px;border-radius:12px;font-size:13px;font-weight:650;white-space:nowrap}.primary-button{background:var(--purple);color:#fff;box-shadow:0 4px 12px #8271ac16}.primary-button:hover:not(:disabled){background:var(--purple-dark)}.download-button{background:#eee9f7;color:#796399}.cancel-button,.danger-button{background:#f9e9ed;color:var(--red)}.danger-button{font-size:12px;padding:10px 14px;min-height:40px}.full-width{width:100%;margin-top:22px}.toast,.error-message{padding:13px 17px;border-radius:12px;font-size:13px;margin:14px 0}.toast{background:#eaf4ee;color:#587e68;border:1px solid #dcebe2}.error-message{background:#fff0f1;color:#ac5867}.boot{padding:100px 0;text-align:center;color:var(--muted)}
.inbox-button{display:flex;align-items:center;gap:10px;min-height:46px;padding:11px 16px;background:#fff;border:1px solid var(--border);border-radius:13px;font-size:13px;font-weight:650;white-space:nowrap}.count-pill{display:grid;place-items:center;min-width:23px;height:23px;background:#f2eef8;border-radius:8px;color:#aa9bbd;font-size:11px}.has-requests{background:#e9ddf6;color:#7e5ca0}.my-practice{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:28px 32px;border:1px solid #e8e0ef;border-radius:23px;background:linear-gradient(110deg,#f0eafa,#faf2ed);margin-bottom:15px}.my-practice .eyebrow{font-size:12px;letter-spacing:0;color:#a08baa}.my-practice h2{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:9px;font-size:22px;font-weight:600}.my-group{font-size:24px;font-weight:750;color:#7d639e}.my-time{font-size:16px;margin-top:8px;color:#756c82;font-weight:500}.my-side{text-align:right}.my-side .muted{font-size:12px;color:#9b8da8}.mode-badge{display:inline-flex;padding:5px 10px;border-radius:8px;background:#f3edf9;font-size:12px;color:#8c72a6;font-weight:600}.practice-overview{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:4px 3px 17px}.practice-overview strong{font-size:13px;font-weight:600;color:#908299}.practice-overview .muted{font-size:11px}.practice-notice{display:flex;flex-wrap:wrap;gap:4px 24px;padding:15px 20px;border:1px solid #e5e9ef;border-radius:14px;background:#f1f5fa;color:#8592a5;font-size:12px;margin-bottom:26px}.practice-notice p:first-child{color:#6c7f99;font-weight:600}.classes{display:flex;flex-direction:column;gap:26px}.class-section{background:#f2eef8;border:1px solid #e9e1f0;border-radius:23px;padding:22px}.class-b{background:#eef5f0;border-color:#e0eae3}.class-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.class-heading>div{display:flex;align-items:center;gap:10px}.class-heading h2{font-size:20px;font-weight:700}.class-letter{display:grid;place-items:center;width:31px;height:31px;border-radius:10px;background:#e4dbf0;color:#9a81af;font-size:14px;font-weight:700}.class-b .class-letter{background:#dfece3;color:#85a292}.class-time{font-size:13px;color:#9d8caf;font-weight:600}.class-b .class-time{color:#87a291}.group-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;align-items:start}.group-card{background:#ffffffed;border:1px solid #eae4f0;border-radius:17px;padding:19px 15px 14px;min-width:0}.class-b .group-card{border-color:#e3ebe5}.card-top{display:flex;align-items:center;gap:8px;padding-bottom:13px;margin-bottom:11px;border-bottom:1px solid #f2eef6}.card-top h3{margin-right:auto;font-size:17px}.group-count{font-size:11px;font-weight:500;color:#aa9cba;background:#f5f1fa;padding:3px 8px;border-radius:7px}.class-b .group-count{background:#f1f6f2;color:#95ab9c}.my-card{border-color:#b9a2d2!important;box-shadow:0 4px 16px #aa91c211}.my-card .card-top h3{color:#806399}.picked{outline:2px solid #b7a1cf;outline-offset:1px}.member-list{display:flex;flex-direction:column;gap:4px}.member{display:flex;align-items:center;gap:8px;width:100%;min-height:36px;padding:6px 4px;border-radius:10px;text-align:left;transition:background .15s}.swappable:hover{background:#f5f0fb}.class-b .swappable:hover{background:#edf5ef}.avatar{flex-shrink:0;display:grid;place-items:center;width:25px;height:25px;border-radius:9px;background:#eeedf7;color:#a59bbd;font-size:11px}.gender-f{background:#faedf1;color:#c99da9}.member-name{font-size:13px;white-space:nowrap;letter-spacing:-.5px}.own-member{background:#f4eefb}.own-member .member-name{font-weight:700;color:#82639e}.me-label{margin-left:auto;font-size:10px;color:#a38bbb;font-weight:600}.swap-hint{margin-left:auto;color:#bdaccf;font-size:16px;opacity:.3}.swappable:hover .swap-hint{opacity:1}.representative-label{display:block;color:#7395c0;font-size:9px;line-height:1.3;margin-top:2px;font-weight:600}.representative-member .member-name,.representative-member td{color:#6d90bc}.representative-member .avatar{background:#edf2fb;color:#91abd0}.seat-count{font-size:11px;color:#ab9eb9;margin:0 0 12px}.group-select{font-size:24px;color:#9f83bd;line-height:1;padding:0 2px}.empty{padding:25px 0;text-align:center;color:#aea3b7;font-size:12px}.selection-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#fff;border:1px solid var(--border);padding:22px 25px;border-radius:17px;margin-bottom:24px}.selection-panel p{margin-top:5px}.selection-actions{display:flex;gap:10px}#unassigned{margin-top:20px}.page-footer{text-align:center;font-size:11px;color:#bcb5c5;margin:35px 0 10px}
.login-layout{max-width:900px;margin:55px auto;display:grid;grid-template-columns:1fr 1fr;background:#fff;border:1px solid var(--border);border-radius:25px;overflow:hidden;box-shadow:0 14px 45px #78628c06}.login-art{padding:47px 36px;background:linear-gradient(140deg,#f0e8fa,#f9efea);position:relative;overflow:hidden}.login-art h1{margin-top:13px;font-size:34px;line-height:1.45}.art-groups{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:42px;transform:rotate(-5deg)}.art-groups span{display:grid;place-items:center;height:63px;background:#ffffffac;border-radius:16px;color:#a28bb7;font-size:21px;font-weight:600}.art-groups span:nth-child(2n){transform:translateY(17px);background:#eef6efc9;color:#92ac99}.login-panel{padding:42px 36px}.login-panel h2{margin-bottom:23px}.login-panel input{width:100%}.login-panel .primary-button{width:100%;margin-top:27px}
.modal{width:calc(100% - 32px);max-width:440px;border:1px solid #e6deed;border-radius:23px;background:#fff;box-shadow:0 28px 90px #3e2a5724;color:var(--ink);padding:26px;max-height:85dvh;overflow:auto}.modal::backdrop{background:#44364c4a;backdrop-filter:blur(4px)}.modal-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.modal-heading h2{font-size:21px}.icon-button{padding:2px 7px;font-size:26px;color:#b4a8bf;line-height:1}.swap-preview{display:grid;grid-template-columns:1fr 1fr;gap:13px;position:relative}.swap-preview:after{content:'↔';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:white;border-radius:50%;padding:1px 7px;color:#b09ac3}.swap-preview>div{border-radius:14px;background:#f3edf9;padding:23px 12px;text-align:center}.swap-preview>div:nth-child(2){background:#eff6f1}.swap-preview strong,.swap-preview span{display:block}.swap-preview span{margin-top:5px;color:#9f8bb0;font-size:12px}#compose-rule{text-align:center;margin-top:17px}.request-tabs{display:flex;border-bottom:1px solid var(--border);margin-bottom:16px}.tab-button{padding:10px 16px;border-bottom:2px solid transparent;font-size:13px;color:#b2a5be}.tab-button.selected{color:#85659f;border-color:#b299c7}.request-card{border:1px solid var(--border);padding:17px;border-radius:14px;margin-top:12px}.request-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.request-title strong{font-size:15px}.request-card p{font-size:12px;margin-top:6px}.request-status{font-size:10px;color:#b4a7c0}.request-status.pending{color:#af9368;background:#fcf5e9;padding:3px 7px;border-radius:6px}.request-status.accepted{color:#82a68f}.request-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:16px}.request-actions .primary-button{min-height:36px;padding:8px 19px}
.control-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-bottom:17px}.control-card{background:white;border:1px solid var(--border);border-radius:18px;padding:23px}.control-card h2{font-size:17px}.control-title{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:14px}.control-card>p{margin-top:8px;font-size:12px}.control-card>p.muted{font-size:11px}.control-card select{width:100%}.control-card label{margin-top:10px}.switch{display:inline-flex!important;position:relative;width:43px;height:25px;margin:0!important;flex-shrink:0}.switch input{position:absolute;inset:0;width:100%;height:100%;min-height:0;margin:0;opacity:0;z-index:2;cursor:pointer}.switch span{position:absolute;inset:0;border-radius:20px;background:#e1dce8;transition:background .2s}.switch span:before{content:'';position:absolute;left:3px;top:3px;width:19px;height:19px;border-radius:50%;background:white;box-shadow:0 1px 4px #0001;transition:transform .2s}.switch input:checked+span{background:#b09bc9}.switch input:checked+span:before{transform:translateX(18px)}.switch input:focus-visible+span{outline:3px solid #d1c3e2}.schedule-card,.representatives-card{margin-bottom:24px}.schedule-form{display:flex;align-items:end;gap:14px}.schedule-form>div{flex:1;min-width:0}.schedule-form input{width:100%}.schedule-form label{margin-top:0}.schedule-form .primary-button{margin-bottom:1px}.representatives-card h2{margin-bottom:17px}.admin-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin:26px 0 18px}.admin-stats{display:flex;gap:20px;color:var(--muted);font-size:12px}.admin-stats strong{font-size:20px;color:var(--ink);margin-left:4px}.admin-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.admin-actions select{font-size:12px;min-height:40px;padding:7px 10px}.roster-table{width:100%;border-collapse:collapse;font-size:11px}.roster-table th,.roster-table td{text-align:left;padding:8px 3px;border-bottom:1px solid #f2eef5;white-space:nowrap}.roster-table th{font-size:10px;color:#afa2bc;font-weight:500}.roster-table th:first-child{width:30px}.roster-table th:last-child{width:30px}.roster-table tr:last-child td{border-bottom:0}.changed-member td{color:#ab8ac2}.calendar-card{margin-top:26px}.calendar-card .roster-table{margin-top:16px;font-size:13px}.calendar-card .roster-table th{font-size:12px}.calendar-card .roster-table td,.calendar-card .roster-table th{padding:11px}.scroll{overflow:auto}.unassigned-list{display:flex;gap:16px;flex-wrap:wrap;margin-top:15px;font-size:13px}#unassigned-panel{margin-top:22px}#reset-form input{width:100%}#reset-description{font-size:13px}
@media(max-width:1050px){.group-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.member-list{display:grid;grid-template-columns:1fr 1fr;gap:5px 12px}.control-grid{grid-template-columns:1fr 1fr}.control-grid>.control-card:last-child{grid-column:1/-1}.group-card{padding:20px}.member-name{font-size:14px}.swap-hint{display:none}}
@media(max-width:650px){body{font-size:14px}.site-header{padding:21px 20px 18px;gap:10px}.brand{font-size:15px;letter-spacing:-.6px;gap:9px}.brand:before{height:30px;width:4px}.brand small{font-size:10px;margin-top:2px}.site-header nav,.account{gap:11px}.site-header .text-button{font-size:11px;padding:8px 0}.account>span{display:none}main{margin:17px auto;padding:0 16px 28px}.page-heading{margin:6px 2px 22px;gap:10px;align-items:center}.page-heading h1{font-size:29px;letter-spacing:-1.3px;margin-top:6px}.eyebrow{font-size:10px;letter-spacing:.5px}.inbox-button{min-height:42px;padding:10px 12px;border-radius:12px;font-size:12px;gap:8px}.count-pill{height:20px;min-width:20px;border-radius:7px;font-size:10px}.my-practice{padding:23px 23px;border-radius:20px;display:block;margin-bottom:14px}.my-practice .eyebrow{font-size:12px}.my-practice h2{gap:13px;margin-top:11px;font-size:20px}.my-group{font-size:25px}.my-time{font-size:16px;margin-top:9px}.my-side{text-align:left;margin-top:15px}.my-side .muted{font-size:11px}.practice-overview{margin:0 3px 14px;gap:10px}.practice-overview strong{font-size:12px}.practice-overview .muted{font-size:10px}.practice-notice{display:block;padding:15px 17px;border-radius:13px;font-size:12px;line-height:1.65;margin-bottom:24px}.practice-notice p+p{margin-top:4px;font-size:11px}.classes{gap:22px}.class-section{border-radius:20px;padding:16px 13px}.class-heading{padding:0 3px;margin-bottom:14px}.class-heading h2{font-size:19px}.class-letter{height:29px;width:29px;border-radius:9px;font-size:13px}.class-time{font-size:12px}.group-grid{grid-template-columns:1fr;gap:12px}.group-card{border-radius:15px;padding:18px 17px 15px}.card-top{margin-bottom:12px;padding-bottom:12px}.card-top h3{font-size:17px}.group-count{font-size:11px}.member-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 13px}.member{min-height:39px;padding:7px 3px;gap:9px}.avatar{height:25px;width:25px;border-radius:9px;font-size:10px}.member-name{font-size:14px;letter-spacing:-.5px}.representative-label{font-size:9px}.me-label{font-size:9px}.swap-hint{display:none}.selection-panel{display:block;padding:21px}.selection-actions{margin-top:17px}.selection-actions button{width:100%}.seat-count{font-size:12px}.login-layout{grid-template-columns:1fr;margin:28px auto;border-radius:21px}.login-art{padding:28px;min-height:170px}.login-art h1{font-size:29px;line-height:1.4;margin-top:9px}.art-groups{position:absolute;right:-15px;top:0;margin-top:43px;width:145px;gap:9px;opacity:.5}.art-groups span{font-size:16px;height:45px}.login-panel{padding:30px 28px 33px}.login-panel h2{font-size:21px;margin-bottom:23px}.login-panel input{min-height:50px;font-size:16px}.login-panel .primary-button{min-height:49px;font-size:14px}.control-grid{grid-template-columns:1fr;gap:12px}.control-grid>.control-card:last-child{grid-column:auto}.control-card{padding:20px;border-radius:16px}.control-title h2{font-size:17px}.schedule-form{flex-direction:column;align-items:stretch;gap:14px}.schedule-form>div{flex:auto}.schedule-form .primary-button{align-self:flex-end;margin-top:2px}.admin-actions{gap:7px}.admin-actions .text-button{font-size:11px}.download-button,.danger-button{font-size:11px;min-height:39px;padding:9px 12px}.roster-table{font-size:13px}.roster-table td{font-size:13px;padding:9px 4px}.roster-table th{font-size:11px}.roster-table th:first-child{width:40px}.roster-table th:last-child{width:35px}.calendar-card .roster-table td{font-size:12px}.admin-heading{margin-top:25px;gap:16px}.modal{padding:24px;max-height:85dvh}.modal-heading h2{font-size:21px}.request-card{padding:15px}.request-card p{font-size:12px}.page-footer{font-size:10px;margin-top:30px}.admin-main .page-heading h1{font-size:28px}}
@media(max-width:360px){.site-header{padding-left:16px;padding-right:16px}.brand{font-size:14px}.site-header nav{gap:8px}main{padding:0 12px 24px}.group-card{padding:17px 13px}.member-list{column-gap:9px}.member{gap:6px}.member-name{font-size:13px}.avatar{width:23px;height:23px}.my-practice{padding:22px 20px}.page-heading h1{font-size:27px}.inbox-button{padding:9px 10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Class selection and explicit exchange actions. */
.class-switch{display:grid;grid-template-columns:1fr 1fr;gap:7px;padding:6px;border:1px solid #e6e0ed;border-radius:17px;background:#f0ecf6;margin:0 0 20px}.class-tab{display:flex;align-items:center;justify-content:center;gap:12px;min-height:57px;padding:12px 18px;border-radius:12px;color:#a092b1;transition:background .15s,color .15s}.class-tab strong{font-size:18px;font-weight:700}.class-tab>span{font-size:12px;font-weight:500}.class-tab[aria-selected="true"]{background:#fff;color:#745994;box-shadow:0 2px 8px #77628b0c}#class-b[aria-selected="true"]{color:#5d8572}.class-tab[aria-selected="false"]:hover{background:#ffffff65}.class-section .member-list{display:flex;flex-direction:column;gap:6px}.member{min-height:43px;gap:8px;padding:6px 5px}.swappable{border:1px solid #eee7f5;background:#fcfaff}.swappable:hover{background:#f1e9fa;border-color:#d8c8e9}.class-b .swappable{background:#f9fcfa;border-color:#e5eee8}.class-b .swappable:hover{background:#edf6f0;border-color:#c9dfd1}.swap-button{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;min-width:42px;min-height:29px;margin-left:auto;padding:4px 9px;background:#8570a9;border-radius:9px;color:white;font-size:11px;line-height:1.4;font-weight:650;letter-spacing:0}.class-b .swap-button{background:#638b76}.swappable:hover .swap-button{background:#705692}.class-b .swappable:hover .swap-button{background:#4d755e}.member-name{flex-shrink:0}.my-practice{margin-bottom:17px}.swap-schedule{margin-top:20px;border:1px solid #e9e4ef;background:#fcfafd;border-radius:14px;padding:16px}.swap-schedule-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-bottom:12px;margin-bottom:4px;border-bottom:1px solid #ece6f1}.swap-schedule-heading>span{font-size:11px;color:#9e8daa}.swap-schedule-heading strong{font-size:13px;color:#766089;font-weight:650}.swap-schedule-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:11px;font-size:12px}.swap-schedule-row>span{color:#8d8098}.swap-schedule-row strong{color:#62526f;font-size:13px;font-weight:650}#compose-title{font-size:21px;letter-spacing:-.8px}.page-heading h1{margin-top:0}
@media(max-width:650px){.class-switch{margin-bottom:16px;padding:5px;gap:5px;border-radius:15px}.class-tab{display:flex;flex-direction:column;gap:2px;min-height:66px;padding:10px;border-radius:11px}.class-tab strong{font-size:18px}.class-tab>span{font-size:11px}.class-section .member-list{display:flex;gap:7px}.class-section .member{min-height:45px;padding:7px 9px;gap:11px}.member-name{font-size:14px}.swap-button{min-width:49px;min-height:31px;font-size:12px;border-radius:9px;padding:5px 10px}.my-practice{padding-top:22px;padding-bottom:22px}.practice-notice{margin-bottom:19px}.swap-schedule{padding:16px}.swap-schedule-row{font-size:12px}.swap-schedule-row strong{font-size:13px}#compose-title{font-size:20px}.modal-heading{gap:8px}.icon-button{flex-shrink:0}}

.placement-card{margin-bottom:24px}.placement-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}.placement-grid>div{min-width:0}.placement-grid label{margin-top:0}.placement-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:18px}.placement-scope-label{color:#8c76a3;font-size:13px;font-weight:650;margin-bottom:15px}.placement-summary{border:1px solid #e8dfef;background:#faf6fd;border-radius:13px;padding:17px}.placement-summary>div{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:6px 0}.placement-summary strong{font-size:14px}.placement-summary span{font-size:13px;color:#9986aa}@media(max-width:650px){.placement-grid{grid-template-columns:1fr;gap:15px}.placement-footer{align-items:stretch;flex-direction:column;gap:12px}.placement-footer .primary-button{align-self:flex-end}.placement-summary>div{gap:8px}.placement-summary strong{font-size:13px}.placement-summary span{font-size:12px}}

.login-panel .remember-option{display:flex;align-items:center;gap:10px;min-height:36px;margin:19px 0 0;color:#80738d;font-size:13px;font-weight:500;cursor:pointer}.login-panel .remember-option input{width:17px;height:17px;min-height:0;padding:0;margin:0;accent-color:#8271ac;flex-shrink:0;border-radius:5px}.remember-option>span{display:inline-flex;align-items:center;gap:8px}.remember-option small{font-size:10px;padding:2px 7px;background:#f2edf8;color:#a08ab4;border-radius:6px}.login-panel .remember-option+.error-message{margin-top:10px}.login-panel .remember-option~.primary-button{margin-top:20px}