/* Cube Fitness: quiet operating surface, with colour reserved for booking state.
   Refinement informed by Unslop, Damir Sokolovsky (heydamir), CC BY 4.0.
   Keeps the original logo, imagery, navigation and calendar state semantics. */
:root{--ink:#24282b;--secondary:#565e64;--muted:#687178;--line:#dce0e2;--surface:#fff;--canvas:#f5f5f3;--accent:#12678e;--radius:6px}
body{background:var(--canvas);color:var(--ink);font-size:16px;line-height:1.55}
header{min-height:76px;height:auto;padding:16px max(4vw,20px);background:#20282c;border-bottom:1px solid #3b4347}
.header-brand{gap:20px}.header-brand img{width:176px;height:40px}.header-brand small{font-size:14px;color:#c4cacc}
header .header-actions{gap:8px}.header-help,.logout{border:1px solid #667176;background:transparent;color:#f4f5f5;border-radius:var(--radius);min-height:44px;padding:8px 12px;font-weight:500}
.header-help:hover,.logout:hover{background:#354046}
main{max-width:1360px;padding:32px 40px 56px}
#app .top{margin:8px 0 24px}#app .top>div{gap:16px}#app .top h1{font-size:28px;line-height:1.25;letter-spacing:-.025em;font-weight:600;color:var(--ink)}#subtitle{font-size:14px;color:var(--secondary)}
h2{font-size:21px;line-height:1.4;font-weight:600;letter-spacing:-.01em;color:var(--ink)}h3{font-weight:600}p{color:var(--secondary)}
.nav{gap:0 24px;margin-bottom:24px;border-color:var(--line)}.nav button,.nav button.active{padding:12px 0;min-height:48px;font-size:15px;font-weight:500;color:var(--secondary);border-bottom:2px solid transparent;background:transparent}.nav button.active{color:var(--ink);font-weight:600;border-color:var(--accent)}.nav button:hover{color:var(--accent)}
.panel{padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:none}.panel+.panel{margin-top:24px}.panel>h2{margin-bottom:20px}.panel>p{max-width:76ch}
.field{font-size:14px;font-weight:500;color:var(--secondary);margin:20px 0 8px}.control{min-height:48px;padding:12px;border:1px solid #bfc6ca;border-radius:var(--radius);background:#fff;color:var(--ink);font-size:16px;line-height:1.4}.control:hover{border-color:#8d979d}.control:focus{border-color:var(--accent)}
button{transition:background-color .15s ease,border-color .15s ease,color .15s ease}.primary,.secondary,.arrow{min-height:44px;padding:10px 16px;border-radius:var(--radius);font-size:15px;line-height:1.5;font-weight:500}.primary{background:var(--accent);color:#fff;border:1px solid var(--accent)}.primary:hover{background:#0d5273}.secondary,.arrow{background:#fff;color:#38454d;border:1px solid #cbd1d5}.secondary:hover,.arrow:hover{background:#f0f2f3;border-color:#9aa6ad}.primary:disabled,.secondary:disabled{cursor:not-allowed}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #247ea3;outline-offset:3px}
.week-controls{gap:16px 24px;margin:16px 0 20px}.week-range-caption{font-size:14px;font-weight:400;color:var(--muted);margin-top:8px}.bar{justify-content:flex-start;gap:8px;margin:16px 0}.window-status{background:#f3f5f5;border-left:3px solid #b8c1c5;padding:12px 16px;color:var(--secondary)}.window-status.window-open{background:#eef5f7;border-color:var(--accent);color:#245267}.window-actions{gap:8px;margin:12px 0 20px}
.teacher-window-settings{background:#fff;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:0;padding:20px 0;margin:24px 0}.teacher-window-settings h3{font-size:16px;font-weight:600}.teacher-window-form{max-width:760px}
.submission-progress{background:#f7f8f8;border:0;border-left:2px solid #9aa7ae;border-radius:0;padding:20px;margin:24px 0}.submission-progress h3{font-size:15px;font-weight:500;color:var(--secondary);margin-bottom:8px}.submission-progress .submission-summary{font-size:24px;font-weight:600;line-height:1.3;color:var(--ink);font-variant-numeric:tabular-nums}.submission-progress .submission-note{font-size:14px;color:var(--muted)}.submission-progress .non-submitter{border-radius:4px}.submission-progress.submission-reached{border-color:#498064}
.schedule{gap:4px;margin-top:20px;padding-top:4px}.day{padding:12px 4px;background:#f1f3f3;color:var(--secondary);border:0;border-bottom:1px solid #cad2d6;border-radius:0;font-size:14px}.schedule .day strong{font-size:24px;font-weight:600;color:var(--ink);margin-top:4px}.schedule .slot{border-radius:4px;border-color:#d5dcdf;color:#40545d;font-size:14px;font-weight:400;background:#fff}.schedule .slot.selected{background:#e0eef6;border:2px solid #1d84c3;color:#174c69;font-weight:600}.schedule .slot.confirmed{background:#397f44;color:#fff;border:2px solid #397f44;font-weight:600}.schedule .slot.unavailable{background:repeating-linear-gradient(135deg,#f0f2f3,#f0f2f3 6px,#e2e6e8 6px,#e2e6e8 8px);color:#5e6a71}.schedule .slot:disabled:not(.confirmed){opacity:.65}.schedule-legend{font-size:13px;color:var(--secondary);gap:16px}
.member-item{border:0;border-bottom:1px solid var(--line);border-radius:0;padding:16px 0;background:#fff}.member-detail{font-weight:500}.member-state,.status{border-radius:4px;background:#f0f3f4;color:#485d68;font-size:13px}.list{gap:0}.detail{background:#f7f8f8;border-radius:6px;border-color:var(--line);padding:24px}.stat{border:0;border-left:1px solid var(--line);border-radius:0;background:transparent;padding:12px 20px}.stat:first-child{border-left:0}.stat strong{font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}.member-summary{color:#375361;font-weight:500}
.agenda-strip{gap:12px}.agenda-strip .agenda-day{border:1px solid var(--line);border-top:2px solid #768c97;border-radius:4px;padding:16px}.agenda-row time,.next-lesson time{font-weight:600}.next-lesson{background:#f1f6f2;border-left:3px solid #397f44;border-radius:0}.week-history-day{border-radius:4px;box-shadow:none}.candidate-choice{border-radius:6px;border-color:#c4d3dc;background:#f7fafb}.candidate-choice strong{font-size:19px;font-weight:600}.candidate-rank{font-weight:500}
.inbox-panel .thread-item{border-radius:6px;box-shadow:none;border-color:var(--line)}.thread-heading{background:#f4f5f5;border-bottom-color:var(--line)}.thread-title,.inbox-panel .inbox-group-title{color:var(--ink);font-weight:600}.inbox-count{background:#f0f2f3;border-radius:4px}.thread-badge{border-radius:4px}.inbox-panel .thread-summary,.inbox-panel .thread-copy{color:var(--secondary)}.device-settings,.inbox-panel .device-settings,.member-import-guide,.member-import-preview:not(:empty){border-radius:6px;background:#f7f8f8;border-color:var(--line)}
dialog{border:1px solid var(--line);border-radius:8px;box-shadow:0 16px 64px #15191b30;padding:28px}dialog::backdrop{background:#18212699}.flow-guide{gap:16px}.flow-guide section{background:#f5f6f6;border-top:1px solid #aebbc2;border-radius:0}.flow-guide section:nth-child(3n+2){border-color:#aebbc2}.manual .flow-guide h3{font-weight:600}
.footer{border-top:1px solid var(--line);padding-top:20px;margin-top:32px;font-size:13px;color:var(--muted)}.footer a{color:#455e6b;text-underline-offset:3px}
/* Keep the gym photographs and existing scene sequence; quiet the form above it. */
body:has(#login:not([hidden])){background-color:#263037;background-blend-mode:multiply}#login{max-width:840px;border-radius:8px;box-shadow:0 12px 40px #0002}#login:not([hidden]){grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}.login-identity{background:#202c32;padding:40px}#login .login-logo{width:176px}.login-brand-rule{width:48px;margin-top:24px;gap:4px}.login-brand-rule i{height:3px}.login-fields{padding:40px;text-align:left}#login h1{font-size:28px;font-weight:600;color:var(--ink);letter-spacing:-.025em}#login .control{border-color:#bfc6ca;color:var(--ink)}#login .primary{background:var(--accent);font-size:16px;min-height:48px}#login .field{margin-top:24px}#login #authToggle{background:transparent;border:0;border-bottom:1px solid #bac5cb;border-radius:0;padding:8px 0;color:#3f5764}#login .login-links{justify-content:flex-start;gap:16px}#login p{color:var(--secondary)}
@media(max-width:700px){header{padding:12px 20px}.header-brand img{width:148px;height:36px}main{padding:24px 20px 40px}#app .top{margin:4px 0 20px}#app .top h1{font-size:25px}.nav{gap:0 20px;margin-bottom:20px}.nav button{font-size:14px}.panel{padding:20px}.week-controls{grid-template-columns:minmax(0,1fr);gap:16px}h2{font-size:20px}.submission-progress{padding:16px}.detail-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.stat{padding:8px}.stat strong{font-size:24px}.stat:first-child{padding-left:0}.login-fields{padding:28px}#login:not([hidden]){grid-template-columns:minmax(0,1fr)}.login-identity{padding:24px}#login .login-logo{width:128px}.login-brand-rule{margin-top:16px}#login{max-width:440px;margin:12px auto}}
@media(max-width:420px){header{padding:12px 16px;gap:12px}.header-brand img{max-width:132px}.header-actions{width:100%;justify-content:flex-start!important}.header-actions button{font-size:13px;padding:8px 12px}main{padding:20px 12px 32px}.panel{padding:16px}#app .top h1{font-size:24px}.nav{column-gap:16px}.nav button{font-size:14px}.submission-progress{margin:20px 0}.schedule .day strong{font-size:24px}.login-fields{padding:24px}#login h1{font-size:25px}.footer{font-size:12px;line-height:1.8}}
@media(prefers-reduced-motion:reduce){button{transition:none}}

/* Keep week navigation and schedule actions on one touch-scrollable line. */
.bar:is(.schedule-toolbar,.import-actions){display:flex;flex-wrap:nowrap;align-items:center;gap:8px;width:100%;min-width:0;max-width:100%;box-sizing:border-box;overflow-x:auto;padding:4px 3px 7px;margin:12px 0 8px;scroll-padding-inline:4px;scrollbar-width:thin}
.bar:is(.schedule-toolbar,.import-actions)>button{flex:0 0 auto;width:auto;min-height:44px;margin:0;white-space:nowrap}
.schedule-dates{display:flex;flex-wrap:wrap;gap:6px 20px;margin:8px 0 18px;font-size:14px;line-height:1.6;color:#465763;font-variant-numeric:tabular-nums}
.schedule-dates span{white-space:nowrap}.schedule-dates strong{font-weight:600;color:#293d49}
.schedule .slot.draft-choice{background:#155979;border:2px solid #104966;color:white}
.schedule .slot.blocked{background:repeating-linear-gradient(135deg,#eff1f2,#eff1f2 6px,#dfe4e6 6px,#dfe4e6 8px);color:#475661}
@media(max-width:600px){.bar:is(.schedule-toolbar,.import-actions)>button{padding-inline:12px}.schedule-dates{column-gap:12px}}

@media(max-width:420px){header{flex-wrap:nowrap;gap:8px}header .header-brand{min-width:0}header .header-actions{width:auto;flex:0 0 auto;flex-wrap:nowrap;gap:6px}header .header-actions button{white-space:nowrap;padding-inline:9px}}

.member-detail{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;padding:13px 20px;border:1px solid transparent}
.member-detail .member-identity{display:grid;gap:2px;line-height:1.45;overflow-wrap:anywhere}
.member-identity strong{font-size:16px;color:#243444}.member-identity>span,.member-balance>span{font-size:13px;color:#475d6c}
.member-balance{display:flex;align-items:baseline;gap:8px;white-space:nowrap;font-variant-numeric:tabular-nums}
.member-balance strong{font-size:19px;color:#204761}
.member-detail.member-detail-low{background:#fff0df;border-color:#efcfad}
.member-detail-low .member-balance strong{color:#853b12}
@media(max-width:600px){.member-detail{padding:12px 14px}}

@media(max-width:420px){.bar.import-actions{gap:6px}.bar.import-actions>button{padding-inline:9px;font-size:14px}}

.list.member-cards{display:grid;gap:8px;margin-block:14px}.member-cards>.member-item{border:0;padding:0}

.member-cards>.member-item:has(>.pending-member){background:#f2edf9;border-radius:10px;padding:6px 12px 6px 0}
.member-cards>.member-item:has(>.pending-member)>.member-detail{background:transparent;border-color:transparent}

.member-chat .inbox-list{background:#f5f8fa;border-radius:12px;padding:14px;max-height:52vh;overflow-y:auto}
.member-chat .question-thread{display:flex;flex-direction:column;gap:7px;padding:8px 0;border:0;background:transparent}
.member-chat .thread-heading{align-self:center;background:transparent;border:0;padding:0;gap:8px}
.member-chat .thread-copy,.member-chat .thread-reply{box-sizing:border-box;width:fit-content;max-width:min(82%,46rem);margin:0;padding:10px 14px;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.55}
.member-chat .thread-copy{align-self:flex-end;border:0;border-radius:14px 14px 3px 14px;background:#dbeefa;color:#173d51}
.member-chat .thread-reply{align-self:flex-start;border:1px solid #dae2e7;border-radius:14px 14px 14px 3px;background:white;color:#273d4b}
.member-chat .thread-copy::before,.member-chat .thread-reply::before{display:block;font-size:12px;font-weight:700;margin-bottom:3px}
.member-chat .thread-copy::before{content:'나'}.member-chat .thread-reply::before{content:'담당 선생님'}
.chat-composer{display:grid;gap:8px;margin-top:16px}.chat-composer textarea{min-height:64px}.chat-composer button{justify-self:end}

.manual .member-manual{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.manual .member-manual section{--step:#245d80;background:#f4f8fa;border:0;border-left:3px solid var(--step);border-radius:8px;padding:16px}
.manual .member-manual section:nth-child(4){--step:#226447;background:#eff7f2}
.manual .member-manual section:nth-child(n+5){--step:#625080;background:#f7f5fa}
.manual .member-manual section>b{color:var(--step);font-variant-numeric:tabular-nums}
.manual .member-manual h3{font-size:18px;font-weight:700;line-height:1.4;margin:4px 0 8px}
.manual .member-manual p{font-size:15px;line-height:1.65;color:#394b57;word-break:keep-all;overflow-wrap:anywhere}
.manual .member-manual p strong{font-weight:700;color:var(--step)}
@media(max-width:600px){.manual .member-manual{grid-template-columns:1fr}}

.assignment-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;counter-reset:step;list-style:none;margin:12px 0 20px;padding:0}
.assignment-flow li{counter-increment:step;line-height:1.55;font-size:14px;color:#394b57;background:#f3f7fa;border-radius:8px;padding:12px 14px;word-break:keep-all;overflow-wrap:anywhere}
.assignment-flow strong{display:block;color:#204e69;margin-bottom:4px}.assignment-flow strong::before{content:counter(step) '. '}
.assignment-flow li:last-child{background:#eef6f1}.assignment-flow li:last-child strong{color:#205b43}
@media(max-width:650px){.assignment-flow{grid-template-columns:1fr;gap:6px}.assignment-flow li{padding:9px 12px}}

.schedule .slot.other-booking:disabled,.schedule .slot.other-booking{background:#e3efe8;color:#456351;border:1px solid #bfd4c6;opacity:1;font-weight:500}
.schedule .slot.confirmed:not(.other-booking){background:#246345;color:white;border-color:#246345;opacity:1}
.schedule-legend .legend-other{background:#e3efe8;border:1px solid #abc5b3}
.draft-shortfall{padding:12px 16px;margin:8px 0;background:#f1f5f7;border-radius:8px;color:#375361}
.draft-shortfall.no-lesson{background:#fce9e7;color:#822d28;border-left:4px solid #ad443d}
.draft-shortfall p{margin:4px 0 0;color:inherit}

.schedule + button.secondary{display:block;margin:16px 0 0 auto;min-height:44px}
@media(max-width:600px){.schedule + button.secondary{width:100%}}

.week-picker-group{min-width:0}
.week-picker-group .schedule-toolbar{margin:6px 0 0;padding:2px 0}
.reception-panel{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 18px;align-items:center;padding:16px 20px;background:#f2f6f8;border-radius:10px;margin-bottom:18px}
.reception-panel h3{margin:0;font-size:16px;color:#173e52}
.reception-panel .window-status{grid-column:1;max-width:none;margin:0;padding:0;background:none;border:0;font-weight:600}
.reception-panel .window-open{color:#21663f}
.reception-panel .schedule-dates{grid-column:1;margin:0}
.reception-panel .reception-actions{grid-column:2;grid-row:1/4;margin:0;width:auto;max-width:100%}
.reception-actions:empty{display:none}
@media(max-width:760px){.reception-panel{grid-template-columns:minmax(0,1fr);padding:14px}.reception-panel .reception-actions{grid-column:1;grid-row:auto;justify-self:start}}

#nav .account-tab{margin-inline-start:auto}

.export-week-hint{margin:6px 0;text-align:end;color:#526673;font-size:14px}

.schedule-identity strong{display:flex;align-items:center;min-height:48px;margin-top:8px;color:var(--ink);font-size:20px;line-height:1.35;font-weight:700;overflow-wrap:anywhere}