/* Sparflag — deep ops console, single amber "capture" accent. Modular SPA styles. */
:root{
  --bg:#0E1220;--surface:#171C2E;--surface2:#1E2540;--line:#2A3350;--ink:#E7ECF6;
  --muted:#8C96B4;--amber:#F4B740;--amber-dim:#7a5f1f;--cyan:#4FD6E0;--danger:#FF6B6B;--success:#57D9A3;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--radius:10px;
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
*{box-sizing:border-box}html,body{margin:0}
[hidden]{display:none!important}
body{background:radial-gradient(1200px 600px at 82% -12%,#16203a 0%,var(--bg) 55%) fixed;color:var(--ink);font-family:var(--sans);line-height:1.5;min-height:100vh}
.mono{font-family:var(--mono)}.muted{color:var(--muted)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);margin:0 0 10px}

/* top bar */
.topbar{display:flex;align-items:center;gap:20px;padding:14px 22px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(14,18,32,.85);backdrop-filter:blur(8px);z-index:20}
.brand{font-family:var(--mono);font-weight:600;font-size:18px;display:flex;gap:10px;align-items:center}
.brand .cursor{color:var(--amber);animation:blink 1.2s steps(1) infinite}@keyframes blink{50%{opacity:0}}
.beacon{width:10px;height:10px;border-radius:50%;background:var(--amber);box-shadow:0 0 12px var(--amber)}
.tabs{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.tab{background:none;border:none;color:var(--muted);font-family:var(--mono);font-size:13px;padding:8px 12px;border-radius:8px;cursor:pointer}
.tab:hover{color:var(--ink)}
.tab.is-active{color:var(--ink);background:var(--surface2)}
.whoami{display:flex;align-items:center;gap:12px}
.tag{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;background:var(--amber);color:#111;padding:3px 9px;border-radius:999px}

/* layout */
main{max-width:1100px;margin:0 auto;padding:26px 22px 70px}
.view-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}
h1{font-size:22px;margin:0}h2{font-family:var(--mono);font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stack{display:flex;flex-direction:column}
.grid{display:grid;gap:14px}
.grid.cols{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}

/* challenge filters */
.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.filters #chal-search,.filters #learn-search{flex:1;min-width:200px;margin-top:0}
.filters select{width:auto;margin-top:0}
.filters #chal-count,.filters #learn-count{margin-left:auto}
.chal.chal-focus{border-color:var(--amber);box-shadow:0 0 0 1px var(--amber)}

/* controls */
button{font:inherit;cursor:pointer}
.primary{background:var(--amber);color:#16130a;border:none;padding:10px 16px;border-radius:8px;font-weight:600}
.primary:hover{filter:brightness(1.06)}
.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);padding:7px 12px;border-radius:8px}
.ghost:hover{border-color:var(--amber);color:var(--amber)}
.ghost.danger:hover{border-color:var(--danger);color:var(--danger)}
.mini{font-size:12px;padding:5px 10px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
input,select,textarea{width:100%;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:inherit;margin-top:5px}
input:focus,select:focus,textarea:focus{border-color:var(--amber);outline:none}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:12px}
.row{display:flex;gap:10px;align-items:center}
.row>*{margin:0}
.err{color:var(--danger);font-size:13px;min-height:18px;margin:8px 0 0}

/* gate */
.gate{display:grid;place-items:center;padding:8vh 20px}
.gate-card{width:min(420px,100%)}
.segmented{display:flex;gap:6px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.seg{background:none;border:none;color:var(--muted);font-family:var(--mono);font-size:13px;padding:8px 6px;border-bottom:2px solid transparent;margin-bottom:-1px}
.seg.is-active{color:var(--ink);border-bottom-color:var(--amber)}
.gate-card .primary{width:100%;margin-top:6px}
.gate-setup{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.gate-setup-copy{font-size:13px;margin:0 0 12px;line-height:1.45}
.gate-setup-copy strong{color:var(--ink);font-weight:600}
.gate-setup-actions{display:flex;flex-direction:column;gap:8px}
.gate-setup-actions .ghost{width:100%}

/* help / setup guide */
.help{display:flex;flex-direction:column;gap:16px;max-width:760px}
.help h3{margin:0 0 8px;font-size:16px}
.help p,.help li{color:var(--muted);font-size:14px}
.help p{margin:0 0 10px}
.help ul,.help ol{margin:0 0 10px;padding-left:1.25rem}
.help li{margin-bottom:6px}
.help a{color:var(--cyan)}
.help strong{color:var(--ink);font-weight:600}
.help .os-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 12px}
.help .os-tab{background:var(--bg);border:1px solid var(--line);color:var(--muted);font-family:var(--mono);font-size:12px;padding:6px 12px;border-radius:8px;cursor:pointer}
.help .os-tab.is-active{color:var(--ink);border-color:var(--amber);background:var(--surface2)}
.help .os-panel[hidden]{display:none!important}
.help-callout{border-left:3px solid var(--amber);padding:10px 14px;background:rgba(244,183,64,.06);border-radius:0 8px 8px 0;margin:10px 0}
.help-callout p{margin:0;color:var(--ink);font-size:13px}
.chal-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);font-size:13px;color:var(--muted)}
.chal-banner strong{color:var(--ink)}

/* learn */
.learn-layout{display:grid;gap:16px}
.learn-tracks{display:grid;gap:12px}
.learn-track{cursor:pointer;transition:border-color .15s}
.learn-track:hover{border-color:var(--amber)}
.learn-track h3{margin:0 0 6px;font-size:16px}
.learn-meta{font-family:var(--mono);font-size:11px;color:var(--cyan);letter-spacing:.06em;text-transform:uppercase}
.learn-lede{margin-top:-6px;margin-bottom:14px}
.learn-filters{margin-bottom:18px}
.learn-resume{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 14px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:rgba(245,180,0,.06)}
.learn-progress{height:4px;background:var(--surface2);border-radius:99px;overflow:hidden;margin:0 0 10px}
.learn-progress span{display:block;height:100%;background:var(--amber)}
.learn-progress-lg{height:6px;margin:0 0 8px}
.learn-module-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.learn-module-list li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--bg);cursor:pointer}
.learn-module-list li:hover{border-color:var(--amber)}
.learn-module-list .done{color:var(--success)}
.learn-reader{max-width:760px}
.learn-sticky-meta{position:sticky;top:56px;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:8px 0;margin:0 0 12px;background:linear-gradient(var(--bg) 70%, transparent);backdrop-filter:blur(2px)}
.learn-nav-inline{display:flex;gap:6px}
.learn-prereq{margin:0 0 14px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:rgba(79,214,224,.05)}
.learn-prereq strong{display:block;margin-bottom:8px;color:var(--ink);font-size:13px}
.learn-body{font-size:14px;color:var(--muted);line-height:1.55}
.learn-body h2{font-family:var(--sans);font-size:18px;letter-spacing:0;text-transform:none;color:var(--ink);margin:22px 0 10px}
.learn-body h3{font-family:var(--sans);font-size:15px;color:var(--ink);margin:18px 0 8px}
.learn-body p{margin:0 0 10px}
.learn-body ul,.learn-body ol{margin:0 0 12px;padding-left:1.25rem}
.learn-body li{margin-bottom:6px}
.learn-body table{width:100%;border-collapse:collapse;margin:0 0 14px;font-size:13px}
.learn-body th,.learn-body td{border:1px solid var(--line);padding:8px 10px;text-align:left}
.learn-body th{color:var(--ink);background:var(--surface2);text-transform:none;letter-spacing:0;font-size:12px}
.learn-body code{font-family:var(--mono);font-size:12px;color:var(--cyan)}
.learn-body pre{margin:10px 0 14px}
.learn-body strong{color:var(--ink)}
.learn-body .mermaid{margin:14px 0 18px;padding:14px 12px;background:var(--surface2);border:1px solid var(--line);border-radius:8px;overflow-x:auto;text-align:center}
.learn-body .mermaid svg{max-width:100%;height:auto}
.learn-objectives{margin:0 0 14px;padding:12px 14px;background:rgba(79,214,224,.06);border:1px solid var(--line);border-radius:8px}
.learn-objectives li{color:var(--ink)}
.learn-checks{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.learn-check{padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
.learn-check p{margin:0 0 8px;color:var(--ink);font-size:14px}
.learn-check label{display:flex;align-items:center;gap:8px;margin:0 0 6px;color:var(--muted);cursor:pointer}
.learn-check input{width:auto;margin:0}
.learn-related{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.learn-related button{font-family:var(--mono);font-size:12px}

/* challenge cards */
.chal{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.chal.solved{border-color:var(--amber-dim)}
.chal .cat{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.chal .t{font-weight:600;margin:6px 0}
.chal .desc{color:var(--muted);font-size:13px;min-height:34px}
.chal .pts{font-family:var(--mono);color:var(--amber);font-size:13px;margin-top:6px}
.chal .captured{font-family:var(--mono);color:var(--amber);font-size:11px;text-transform:uppercase;letter-spacing:.1em}
.chal .adminbar{margin-top:12px;display:flex;gap:8px}
.console{display:flex;margin-top:12px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--bg)}
.console .p{display:flex;align-items:center;padding:0 10px;font-family:var(--mono);color:var(--amber);background:var(--surface2)}
.console input{border:none;border-radius:0;margin:0;background:transparent;font-family:var(--mono)}
.console .primary{border-radius:0}
.res{font-family:var(--mono);font-size:13px;min-height:18px;margin-top:8px}
.res.ok{color:var(--success)}.res.no{color:var(--danger)}
pre{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px;overflow:auto;font-family:var(--mono);font-size:12px;color:var(--cyan);white-space:pre-wrap;word-break:break-all;margin-top:10px}

/* tables */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
th{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
td .mono{font-size:13px}
.pill{font-family:var(--mono);font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--line)}
.pill.role-admin{color:var(--amber);border-color:var(--amber-dim)}
.pill.role-judge{color:var(--cyan);border-color:#2b4a52}
.pill.role-challenger{color:var(--muted)}
.pill.on{color:var(--success)}.pill.off{color:var(--danger)}
.pill.v-cheating{color:var(--danger);border-color:#5a2b2b}
.pill.v-cleared{color:var(--success);border-color:#2b5a45}
.pill.v-noted{color:var(--muted)}
.flagrow{color:var(--danger)}

/* scoreboard */
.board-empty{max-width:560px}
.board-empty .empty{margin:0;padding:22px 18px;line-height:1.5;white-space:normal}
ol.board{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;max-width:560px}
ol.board li{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:12px;padding:13px 16px;border-bottom:1px solid var(--line)}
ol.board li:last-child{border:none}
ol.board li.board-head{padding-top:10px;padding-bottom:10px;background:var(--surface2);pointer-events:none}
ol.board li.board-head .r,ol.board li.board-head .s,ol.board li.board-head span{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
ol.board .r{font-family:var(--mono);color:var(--muted)}
ol.board .board-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink)}
ol.board .s{font-family:var(--mono);color:var(--amber);font-variant-numeric:tabular-nums}
ol.board li.lead{background:linear-gradient(90deg,rgba(244,183,64,.10),transparent)}
ol.board li.lead .r{color:var(--amber)}
ol.board li.empty{display:block;grid-template-columns:none}

/* modal */
.modal{position:fixed;inset:0;background:rgba(6,9,18,.7);display:grid;place-items:center;padding:20px;z-index:40}
.modal-card{position:relative;width:min(520px,100%);max-height:90vh;overflow:auto}
.modal-close{position:absolute;top:12px;right:14px;background:none;border:none;color:var(--muted);font-size:16px}
.modal-close:hover{color:var(--ink)}
.modal-card h3{margin:0 0 14px}
.form-actions{display:flex;gap:10px;margin-top:6px}

/* toast */
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--surface2);border:1px solid var(--amber);color:var(--ink);padding:12px 18px;border-radius:10px;font-family:var(--mono);font-size:13px;z-index:60}
.empty{color:var(--muted);font-size:14px;padding:16px}
@media(max-width:720px){.topbar{flex-wrap:wrap}.tabs{order:3;width:100%}}