/* Hackathon — team-based v6 · clean research-friendly theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono&display=swap');

/* ── Base ─────────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font:16px/1.55 'Inter',system-ui,sans-serif;color:#1f2937;background:#f6f8fb}
body{min-height:100vh;display:flex;flex-direction:column}
h1{font-size:1.7rem;margin:.4em 0;color:#0f172a}
h2{font-size:1.3rem;margin:.4em 0;color:#0f172a}
h3{font-size:1.05rem;margin:.5em 0;color:#111827}
a{color:#2563eb;text-decoration:none}
a:hover{text-decoration:underline}
code,pre,textarea{font-family:'JetBrains Mono',ui-monospace,monospace}
pre{background:#0f172a;color:#e5e7eb;padding:12px;border-radius:8px;white-space:pre-wrap;border:none;width:100%;font-size:.85rem;line-height:1.5}
textarea{background:#fff;color:#111827;padding:12px;border-radius:8px;white-space:pre-wrap;border:1px solid #d1d5db;width:100%;font-size:.95rem;line-height:1.5;min-height:120px;resize:vertical;font-family:'Inter',system-ui,sans-serif}
textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.15)}
small{color:#6b7280}
hr{border:none;border-top:1px solid #e5e7eb;margin:20px 0}
.hide-sm{display:inline}
@media (max-width:640px){.hide-sm{display:none}}

/* ── Nav / footer ─────────────────────────────────────────────────────── */
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#fff;border-bottom:1px solid #e5e7eb;gap:12px;flex-wrap:wrap}
.nav .brand{display:flex;align-items:center;gap:10px;color:#111827;font-size:1.05rem}
.nav .brand .subtle{color:#6b7280;font-weight:400;font-size:.8rem}
.nav nav{display:flex;gap:14px;align-items:center}
.trophy{font-size:1.3rem}
.btn-nav{padding:8px 14px !important;font-size:.9rem}
footer.foot{text-align:center;color:#6b7280;padding:24px;font-size:.85rem;margin-top:auto}

/* ── Buttons ──────────────────────────────────────────────────────────── */
.btn-primary,.btn-ghost,.btn-danger,.btn-secondary{
  display:inline-block;padding:10px 16px;border-radius:8px;font-weight:600;
  cursor:pointer;border:1px solid transparent;font-size:.95rem;
  font-family:inherit;line-height:1.2;text-decoration:none;
  transition:background .15s,border-color .15s,color .15s,transform .05s
}
.btn-primary{background:#2563eb;color:#fff}
.btn-primary:hover{background:#1d4ed8;text-decoration:none}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:disabled{background:#94a3b8;cursor:not-allowed}
.btn-ghost{background:transparent;color:#2563eb;border-color:#2563eb}
.btn-ghost:hover{background:#eff6ff;text-decoration:none}
.btn-secondary{background:#fff;color:#374151;border-color:#d1d5db}
.btn-secondary:hover{background:#f3f4f6;border-color:#9ca3af;text-decoration:none}
.btn-danger{background:#dc2626;color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-primary.big,.btn-ghost.big,.btn-secondary.big{font-size:1rem;padding:14px 22px}
.btn-primary.small,.btn-ghost.small,.btn-secondary.small{padding:6px 12px;font-size:.85rem}
button{font-family:inherit}

/* ── Cards ────────────────────────────────────────────────────────────── */
.card-center{flex:1;display:flex;align-items:center;justify-content:center;padding:32px 16px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:28px;max-width:560px;width:100%;box-shadow:0 1px 3px rgba(15,23,42,.04)}
.card.wide{max-width:760px}
.card.wider{max-width:960px}
.card h1{margin-top:0}

/* ── Forms ────────────────────────────────────────────────────────────── */
label{display:block;margin:12px 0;font-weight:500;color:#374151}
label input,label select,label textarea{margin-top:6px;width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font:inherit;font-size:.95rem;background:#fff}
label input:focus,label select:focus,label textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.15)}
label .help{display:block;margin-top:4px;color:#6b7280;font-size:.85rem;font-weight:400}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.row{grid-template-columns:1fr}}
.check{display:flex;align-items:flex-start;gap:10px;font-weight:400;cursor:pointer}
.check input{width:18px;height:18px;margin-top:3px;flex-shrink:0;cursor:pointer}
fieldset{border:1px solid #e5e7eb;border-radius:10px;padding:16px;margin:14px 0;background:#fff}
legend{font-weight:600;padding:0 8px;color:#374151}
.required{color:#dc2626}
.form-section{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:20px;margin-bottom:16px}
.form-section h3{margin-top:0;color:#111827;font-size:1.05rem}
.form-section .help-text{color:#6b7280;font-size:.88rem;margin-bottom:12px}
.form-actions{margin-top:24px;display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}

/* ── Landing ──────────────────────────────────────────────────────────── */
.landing{max-width:1000px;margin:0 auto;padding:32px 16px}
.hero{text-align:center;padding:24px 0 40px}
.kicker{color:#6b7280;font-weight:600;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase}
.hero h1{font-size:2.4rem;margin:12px 0;line-height:1.2}
.hero .lede{color:#4b5563;max-width:640px;margin:0 auto 24px;font-size:1.05rem}
.chips{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.chip{background:#eff6ff;color:#1e3a8a;padding:6px 12px;border-radius:999px;font-size:.85rem;font-weight:500;display:inline-flex;align-items:center;gap:4px}
.chip-ai{background:#dbeafe;color:#1e40af}
.chip-solo,.chip-no_ai{background:#fef3c7;color:#92400e}
.chip-muted{background:#f3f4f6;color:#6b7280}
.chip-success{background:#dcfce7;color:#166534}
.chip-danger{background:#fee2e2;color:#991b1b}
.chip-warn{background:#fef3c7;color:#92400e}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:32px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:16px 0}
.step{background:#fff;border:1px solid #e5e7eb;padding:20px;border-radius:10px;position:relative}
.step .num{background:#2563eb;color:#fff;width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;margin-bottom:8px}
.step h3{margin:.3em 0}
.guarantees{background:#f0fdf4;border:1px solid #86efac;padding:20px;border-radius:10px;margin-top:24px}
.guarantees h2{color:#166534;margin-top:0}
.features{margin-top:28px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:12px}
.feature{background:#fff;border:1px solid #e5e7eb;padding:20px;border-radius:10px}
.feature-icon{font-size:1.8rem;margin-bottom:8px}

/* ── Alerts ───────────────────────────────────────────────────────────── */
.flash{padding:12px 16px;border-radius:8px;margin:12px 0;font-weight:500;font-size:.95rem}
.flash-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.flash-success{background:#f0fdf4;color:#166534;border:1px solid #86efac}
.flash-warn{background:#fffbeb;color:#854d0e;border:1px solid #fcd34d}
.flash-info{background:#eff6ff;color:#1e3a8a;border:1px solid #bfdbfe}

/* ── Boxes ────────────────────────────────────────────────────────────── */
.box{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:18px;margin-bottom:16px}
.box h3{margin-top:0}
.box.info{background:#eff6ff;border-color:#bfdbfe}
.box.success{background:#f0fdf4;border-color:#86efac}
.box.warn{background:#fffbeb;border-color:#fcd34d}
.box.danger{background:#fef2f2;border-color:#fecaca}
.box.locked{text-align:center;padding:48px 16px;background:#f9fafb}
.box.pv-note{background:#eff6ff;border-color:#bfdbfe}
.box.reveal{background:#f0fdf4;border-color:#86efac}
.subtle{color:#6b7280;font-size:.9rem}
.subtitle{color:#6b7280;font-size:1rem;margin-top:-4px;margin-bottom:20px}
.tiny{font-size:.8rem}

/* ── Task layout ──────────────────────────────────────────────────────── */
.task-page{max-width:1400px;margin:0 auto;padding:16px}
.task-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:12px 16px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;margin-bottom:16px;box-shadow:0 1px 3px rgba(15,23,42,.04)}
.timer{margin-left:auto;font-family:'JetBrains Mono',monospace;font-weight:600;color:#111827;background:#f3f4f6;padding:6px 12px;border-radius:6px;font-size:.9rem}
.task-body{display:grid;grid-template-columns:1fr;gap:16px}
.task-body.with-ai{grid-template-columns:2fr 1fr}
@media (max-width:960px){.task-body.with-ai{grid-template-columns:1fr}}
.tests{list-style:none;padding-left:0}
.tests li{padding:4px 0;color:#374151;font-family:'JetBrains Mono',monospace;font-size:.85rem}
.prompt{max-height:340px;overflow:auto}

/* ── CodeMirror ───────────────────────────────────────────────────────── */
.CodeMirror{min-height:260px;border:1px solid #e5e7eb;border-radius:8px;font-size:.9rem}

/* ── AI panel ─────────────────────────────────────────────────────────── */
.ai-panel{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:10px;max-height:80vh}
.ai-panel h3{margin-top:0}
.ai-panel.solo-note{background:#f9fafb}
.ai-log{flex:1;overflow:auto;padding:8px;background:#f9fafb;border-radius:6px;display:flex;flex-direction:column;gap:8px;min-height:200px}
.ai-log .msg{padding:8px 10px;border-radius:6px;font-size:.9rem;line-height:1.5}
.ai-log .msg.user{background:#dbeafe;align-self:flex-end;max-width:80%}
.ai-log .msg.bot{background:#f3f4f6;align-self:flex-start;max-width:90%;white-space:pre-wrap}
#ai-form{display:flex;gap:8px;align-items:flex-end}
#ai-input{flex:1;min-height:70px}

/* ── Question tabs (coder/reviewer multi) ─────────────────────────────── */
.question-tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid #e5e7eb;overflow-x:auto}
.tab-btn{padding:10px 14px;background:transparent;border:none;cursor:pointer;font-weight:500;border-bottom:3px solid transparent;color:#6b7280;font-family:inherit;font-size:.95rem;white-space:nowrap}
.tab-btn:hover{color:#1f2937;background:#f9fafb}
.tab-btn.active{border-bottom-color:#2563eb;color:#2563eb}
.tab-btn .tick{color:#16a34a;margin-left:6px}

/* Difficulty badges */
.difficulty-badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.8rem;font-weight:600;margin-bottom:8px;text-transform:uppercase;letter-spacing:.05em}
.difficulty-easy{background:#dcfce7;color:#166534}
.difficulty-medium{background:#fef3c7;color:#92400e}
.difficulty-hard{background:#fee2e2;color:#991b1b}

/* Reviewer code display (read-only) */
.code-display{background:#0f172a;color:#e5e7eb;border-radius:8px;padding:12px 0;font-family:'JetBrains Mono',monospace;font-size:.85rem;overflow-x:auto;line-height:1.55}
.code-line{display:flex;padding:0 12px}
.code-line:hover{background:#1e293b}
.line-num{color:#64748b;width:38px;text-align:right;padding-right:14px;user-select:none;flex-shrink:0}
.code-line code{white-space:pre;flex:1}

/* Reviewer line flagging (pre-vetted flow only) */
.code-flag{background:#0f172a;color:#e5e7eb;border-radius:8px;padding:8px 0;font-family:'JetBrains Mono',monospace;font-size:.85rem;overflow-x:auto}
.code-row{display:flex;cursor:pointer;padding:2px 0}
.code-row:hover{background:#1f2937}
.code-row.flagged{background:#7f1d1d}
.code-row .gutter{width:40px;text-align:right;padding-right:12px;color:#6b7280;user-select:none;flex-shrink:0}
.code-row code{white-space:pre;flex:1}
.flag-list{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.flag-list li{background:#fee2e2;color:#991b1b;padding:4px 8px;border-radius:4px;font-size:.85rem;cursor:pointer}
.verdict{display:flex;flex-direction:column;gap:8px}
.verdict label{margin:0;display:flex;gap:10px;align-items:center;font-weight:500;padding:10px 12px;border:1px solid #e5e7eb;border-radius:8px;cursor:pointer}
.verdict label:hover{background:#f9fafb}
.verdict input[type=radio]{width:18px;height:18px;accent-color:#2563eb}

/* ── Team registration ────────────────────────────────────────────────── */
.members-container{display:flex;flex-direction:column;gap:10px;margin:12px 0}
.member-row{display:grid;grid-template-columns:1fr 1.4fr 160px 40px;gap:10px;align-items:end;padding:12px;background:#f9fafb;border:1px solid #e5e7eb;border-radius:8px;animation:slideIn .2s ease}
@media (max-width:720px){.member-row{grid-template-columns:1fr}}
.member-row label{margin:0;font-size:.82rem;font-weight:500;color:#6b7280}
.member-row input,.member-row select{padding:8px 10px;font-size:.9rem}
.member-row .remove-btn{padding:8px 12px;background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:8px;cursor:pointer;font-weight:600;align-self:end;height:40px}
.member-row .remove-btn:hover{background:#fecaca}
@keyframes slideIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
.team-stats{margin-top:12px;padding:12px 16px;background:#eff6ff;border-left:4px solid #2563eb;border-radius:6px;font-size:.92rem;display:flex;flex-wrap:wrap;gap:16px;align-items:center}
.team-stats.balanced{background:#f0fdf4;border-color:#16a34a}
.team-stats.unbalanced{background:#fef3c7;border-color:#d97706}
.team-stats .warn{color:#92400e;font-weight:500;margin-left:auto}

/* Credentials table (post-registration) */
.creds-table{width:100%;border-collapse:collapse;margin:12px 0;background:#fff;border-radius:8px;overflow:hidden;border:1px solid #e5e7eb}
.creds-table th,.creds-table td{padding:10px 12px;text-align:left;border-bottom:1px solid #f3f4f6;font-size:.92rem}
.creds-table th{background:#f9fafb;color:#374151;font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}
.creds-table td code{background:#f3f4f6;padding:2px 8px;border-radius:4px;font-size:.85rem}
.creds-table tbody tr:last-child td{border-bottom:none}

/* ── Admin ────────────────────────────────────────────────────────────── */
.admin-main{max-width:1200px;margin:0 auto;padding:24px 16px}
.admin-tabs{display:flex;gap:4px;border-bottom:1px solid #e5e7eb;margin-bottom:20px;flex-wrap:wrap;overflow-x:auto}
.admin-tabs a{padding:10px 16px;color:#4b5563;border-bottom:2px solid transparent;white-space:nowrap}
.admin-tabs a:hover{color:#1f2937;text-decoration:none}
.admin-tabs a.active{color:#2563eb;border-color:#2563eb;font-weight:600}
.kpi-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:16px 0}
.kpi{background:#fff;border:1px solid #e5e7eb;padding:18px;border-radius:10px;text-align:center;box-shadow:0 1px 3px rgba(15,23,42,.04)}
.kpi big{display:block;font-size:1.9rem;font-weight:700;color:#111827;line-height:1.2}
.kpi span{color:#6b7280;font-size:.85rem}
.kpi.accent-blue{background:#eff6ff;border-color:#bfdbfe}
.kpi.accent-amber{background:#fffbeb;border-color:#fcd34d}
.kpi.accent-green{background:#f0fdf4;border-color:#86efac}
.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;border:1px solid #e5e7eb}
.tbl th,.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid #f3f4f6;font-size:.9rem;vertical-align:top}
.tbl th{background:#f9fafb;color:#374151;font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}
.tbl tbody tr:hover{background:#f9fafb}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl .inline-form{display:inline-flex;gap:4px;align-items:center}
.tbl .inline-form select{padding:4px 8px;font-size:.85rem;border-radius:4px;border:1px solid #d1d5db}
.cell-full{background:#dcfce7;color:#166534;font-weight:600}
.stage-card{padding:14px;border:1px solid #e5e7eb;border-radius:8px;margin-bottom:8px;background:#fff;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.stage-card.active{border-color:#2563eb;background:#eff6ff}
.danger-zone{border-color:#fecaca;background:#fef2f2}
.danger-zone h3{color:#991b1b}

/* Guidelines, stats-grid, breadcrumbs */
.breadcrumb{margin-bottom:16px}
.breadcrumb a{color:#6b7280;font-size:.9rem}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:12px}
.stat-item{text-align:center;padding:14px;background:#f9fafb;border:1px solid #e5e7eb;border-radius:8px}
.stat-label{font-size:.85rem;color:#6b7280;margin-bottom:4px}
.stat-value{font-size:1.4rem;font-weight:700;color:#2563eb}
.guidelines-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-top:12px}
.guideline{background:#f9fafb;border:1px solid #e5e7eb;padding:14px;border-radius:8px}
.guideline h4{margin-bottom:6px;color:#1f2937}
.guideline ul{margin:0;padding-left:18px;font-size:.9rem}
.guideline li{margin:2px 0}

/* ── Misc ─────────────────────────────────────────────────────────────── */
.blind-note{margin-top:12px;padding:10px 12px;background:#f3f4f6;border-radius:6px;font-size:.85rem;color:#4b5563}
.checklist{list-style:none;padding:0;line-height:2}
details summary{cursor:pointer;color:#2563eb;font-weight:500}
details[open] summary{margin-bottom:6px}

/* ── Likert / rating ──────────────────────────────────────────────────── */
.likert{display:grid;grid-template-columns:100px repeat(7,1fr) 120px;gap:6px;align-items:center;margin:16px 0}
.likert legend{grid-column:1/-1;margin-bottom:8px}
.likert .lo,.likert .hi{color:#6b7280;font-size:.85rem}
.likert .hi{text-align:right}
.bubble{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px;border-radius:8px;cursor:pointer;font-weight:600;color:#6b7280;background:#f9fafb;border:1px solid #e5e7eb}
.bubble:has(input:checked){background:#2563eb;color:#fff;border-color:#2563eb}
.bubble input{display:none}
.rating-options{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.rating-option{display:flex;align-items:center;gap:12px;padding:14px;border:2px solid #e5e7eb;border-radius:10px;cursor:pointer;transition:all .15s}
.rating-option:hover{border-color:#bfdbfe;background:#f9fafb}
.rating-option input{width:18px;height:18px;accent-color:#2563eb;flex-shrink:0}
.rating-option:has(input:checked){border-color:#2563eb;background:#eff6ff;color:#1e40af}
.rating-stars{font-size:1.1rem;letter-spacing:2px}
.rating-text{font-weight:500}

/* ── Consent (IRB) ────────────────────────────────────────────────────── */
.consent-section{background:#fffbeb;border:1px solid #fcd34d}
.consent-section h3{color:#78350f}
.consent-content{margin-bottom:14px;line-height:1.6}
.consent-content ul{margin:8px 0;padding-left:22px}
.consent-content li{margin:4px 0}
.irb{background:#f0fdf4;border:1px solid #86efac;padding:14px;border-radius:8px;margin:14px 0}

/* ── Dashboard waiting / empty states ─────────────────────────────────── */
.waiting-card{text-align:center;padding:40px 24px}
.waiting-card .icon{font-size:2.4rem;margin-bottom:8px}
.waiting-card h1{margin:10px 0}

/* ── KPI / progress progress bars ─────────────────────────────────────── */
.progress{height:8px;background:#e5e7eb;border-radius:4px;overflow:hidden;margin-top:6px}
.progress .bar{height:100%;background:#2563eb;border-radius:4px;transition:width .3s}
.progress .bar.ok{background:#16a34a}
.progress .bar.warn{background:#d97706}