@import "https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500&display=swap";:root{--paper:#f5f7fb;--paper-strong:#fff;--ink:#111827;--ink-soft:#334155;--muted:#64748b;--line:#0f172a1a;--panel:#fff;--panel-strong:#fff;--accent:#0f766e;--accent-strong:#155e75;--accent-soft:#d9f3ef;--signal:#b45309;--signal-soft:#fff1d6;--danger:#dc2626;--success:#15803d;--shadow:0 12px 30px #0f172a14;--radius-xl:8px;--radius-lg:8px;--radius-md:6px;--app-bg:linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);--header-bg:#111827;--header-ink:#f8fafc;--card-border:#0f172a14;--control-bg:#eef2f7;--meta-bg:#f8fafc;--input-bg:#fff}:root[data-theme=dark]{--paper:#0f141b;--paper-strong:#151b24;--ink:#e5e7eb;--ink-soft:#cbd5e1;--muted:#94a3b8;--line:#e2e8f01f;--panel:#151b24;--panel-strong:#1c2532;--accent:#2dd4bf;--accent-strong:#38bdf8;--accent-soft:#2dd4bf24;--signal:#fbbf24;--signal-soft:#fbbf2424;--danger:#f87171;--success:#4ade80;--shadow:0 12px 32px #00000047;--app-bg:linear-gradient(180deg, #0b1118 0%, #111827 100%);--header-bg:#050b12;--header-ink:#f8fafc;--card-border:#e2e8f01f;--control-bg:#1f2937;--meta-bg:#111827;--input-bg:#111827}*{box-sizing:border-box}body{background:var(--app-bg);color:var(--ink);margin:0;font-family:Space Grotesk,Segoe UI,sans-serif}a{color:inherit}.page-shell{min-height:100vh}.page-content{max-width:1400px;margin:0 auto;padding:24px;position:relative}.solve-page{gap:24px;display:grid}.solve-layout{grid-template-columns:minmax(0,1.45fr) minmax(320px,.85fr);gap:24px;display:grid}.left-panel,.right-panel,.feedback-stack{flex-direction:column;gap:18px;display:flex}.card{background:var(--panel);border-radius:var(--radius-xl);box-shadow:var(--shadow);border:1px solid var(--card-border);padding:22px}.app-header{background:var(--header-bg);color:var(--header-ink);z-index:10;border-bottom:1px solid #ffffff14;justify-content:space-between;align-items:center;padding:22px 28px;display:flex;position:sticky;top:0}.brand-link{color:var(--header-ink);letter-spacing:0;font-size:30px;font-weight:700;text-decoration:none}.subtitle{color:#e7f4edc2;margin:4px 0 0}.header-actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.header-link,.role-chip,.user-chip{background:#ffffff1a;border-radius:999px;padding:8px 12px;font-size:14px}.header-link{color:var(--header-ink);text-decoration:none}.header-link.router-link-active{background:#ffffff2e}.header-button{cursor:pointer;font:inherit;border:0}.role-chip{background:#147a6747}.app-header .ghost-btn{color:var(--header-ink);background:#ffffff1f}.primary-btn,.ghost-btn{cursor:pointer;border:none;border-radius:999px;justify-content:center;align-items:center;padding:12px 18px;font-weight:600;text-decoration:none;transition:transform .18s,box-shadow .18s,background .18s;display:inline-flex}.primary-btn{background:linear-gradient(135deg, var(--accent), var(--accent-strong));color:#fff;box-shadow:0 12px 25px #147a6738}.primary-btn:hover{transform:translateY(-1px)}.ghost-btn{background:var(--control-bg);color:var(--ink)}.primary-btn:disabled,.ghost-btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}.section-head{justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.task-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;display:grid}.task-top{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.task-card h3,.solve-hero h2,.auth-card h2,.feedback-card h3{letter-spacing:0;margin:0}.badge,.compact-chip{border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}.badge.easy{color:#176143;background:#dff5e6}.badge.medium{color:#91552d;background:#fff0cf}.badge.hard{color:#8c3827;background:#fde3dc}:root[data-theme=dark] .badge.easy{color:#86efac;background:#22c55e29}:root[data-theme=dark] .badge.medium{color:#fcd34d;background:#f59e0b29}:root[data-theme=dark] .badge.hard{color:#fca5a5;background:#f8717129}.task-desc,.task-topic,.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:0;color:var(--muted);margin:0 0 8px;font-size:12px}.solve-hero{justify-content:space-between;align-items:flex-start;gap:24px;display:flex;position:relative;overflow:hidden}.solve-hero:after{content:"";display:none}.solve-meta{color:var(--ink-soft);margin:10px 0 14px;font-family:IBM Plex Mono,monospace;font-size:13px}.solve-hero-actions,.editor-toolbar,.feedback-head,.feedback-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.feedback-head.compact{align-items:flex-start}.connection-pill,.signal-pill{border-radius:999px;padding:10px 14px;font-size:13px;font-weight:600}.connection-pill.live,.signal-pill.signal-good{background:var(--accent-soft);color:var(--success)}.connection-pill.idle,.signal-pill.signal-warn{background:var(--signal-soft);color:var(--signal)}.signal-pill.signal-neutral{background:var(--control-bg);color:var(--ink-soft)}.editor-card{padding:16px}.monaco-shell{background:#101915;border:1px solid #ffffff8c;border-radius:18px;width:100%;height:520px;overflow:hidden;box-shadow:inset 0 1px #ffffff0f}.monaco-editor-instance{width:100%;height:100%}.feedback-text{margin:18px 0 0;font-size:16px;line-height:1.6}.feedback-meta-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px;display:grid}.meta-card,.editor-note-card{border-radius:var(--radius-lg);background:var(--meta-bg);border:1px solid var(--line);padding:14px}.meta-label{text-transform:uppercase;letter-spacing:0;color:var(--muted);margin-bottom:8px;font-size:12px;display:block}.feedback-support{background:var(--panel-strong)}.session-note{color:var(--muted);margin:14px 0 0;font-family:IBM Plex Mono,monospace;font-size:12px}.success-text{color:var(--success)}.profile-page{gap:22px;display:grid}.profile-hero{justify-content:space-between;align-items:flex-start;gap:20px;display:flex}.profile-hero h2,.progress-panel h2{letter-spacing:0;margin:0}.profile-subtitle{color:var(--muted);margin:8px 0 0}.profile-meta-row,.profile-actions,.task-progress-side,.activity-side{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.profile-meta-row{margin-top:14px}.profile-meta-row span{background:var(--control-bg);color:var(--ink-soft);border-radius:999px;padding:8px 10px;font-size:13px}.profile-stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.stat-tile{background:var(--panel);border:1px solid var(--card-border);border-radius:var(--radius-xl);min-height:120px;box-shadow:var(--shadow);align-content:space-between;padding:18px;display:grid}.stat-tile span,.stat-tile small{color:var(--muted)}.stat-tile strong{letter-spacing:0;font-size:28px}.profile-layout{grid-template-columns:minmax(0,1.35fr) minmax(320px,.75fr);gap:18px;display:grid}.task-progress-panel{grid-row:span 2}.task-progress-list,.activity-list,.bar-list{gap:12px;display:grid}.task-progress-row,.activity-row{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--meta-bg);justify-content:space-between;gap:18px;padding:14px;display:flex}.task-progress-row h3{letter-spacing:0;margin:0}.task-progress-meta,.activity-row p{margin:8px 0 0}.activity-side{color:var(--muted);text-align:right;flex-direction:column;justify-content:center;align-items:flex-end}.bar-row-head{justify-content:space-between;gap:12px;margin-bottom:8px;display:flex}.bar-track{background:var(--control-bg);border-radius:999px;height:10px;overflow:hidden}.bar-fill{background:linear-gradient(90deg, var(--accent), var(--accent-strong));border-radius:inherit;height:100%}.secondary-eyebrow{margin-top:22px}.compact-chip-list{flex-wrap:wrap;gap:8px;display:flex}.compact-chip{background:var(--control-bg);color:var(--ink-soft)}.submit-code-btn{background:linear-gradient(135deg, #2563eb, var(--accent-strong))}.submit-result-card{gap:14px;display:grid}.submit-profile-link{justify-self:flex-start}.auth-page{background:var(--app-bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.auth-card{width:100%;max-width:420px}.auth-form{gap:12px;display:grid}input,select{background:var(--input-bg);width:100%;color:var(--ink);font:inherit;border:1px solid #18211b1f;border-radius:12px;padding:12px 14px}.auth-form input:focus,.auth-form select:focus{border-color:#147a6761;outline:2px solid #147a6738}.auth-switch{color:var(--muted);text-align:center;margin-top:14px}.auth-switch a{color:var(--accent);font-weight:600;text-decoration:none}.error-text{color:var(--danger)}@media (width<=960px){.app-header,.solve-hero,.profile-hero{flex-direction:column;align-items:flex-start}.solve-layout,.profile-layout,.feedback-meta-grid{grid-template-columns:1fr}.profile-stats{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=640px){.page-content,.app-header{padding:18px}.profile-stats{grid-template-columns:1fr}.task-progress-row,.activity-row{flex-direction:column}.activity-side{text-align:left;align-items:flex-start}}.native-workspace{gap:24px;display:grid}.workspace-grid{grid-template-columns:minmax(280px,.8fr) minmax(0,1.2fr);align-items:start;gap:24px;display:grid}.workspace-code{gap:18px;min-width:0;display:grid}.workspace-controls label{gap:8px;display:grid}.action-row,.pagination{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.pagination{margin-top:18px}.sample-pair{grid-template-columns:1fr 1fr;gap:12px;display:grid}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--meta-bg);border:1px solid var(--line);border-radius:6px;padding:12px}.case-results,.history-list{overflow-wrap:anywhere;gap:12px;padding-left:20px;display:grid}.history-list button{margin-left:12px}.statement-card h1{font-size:28px}input,textarea,select{max-width:100%;color:var(--ink);background:var(--input-bg)}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline:3px solid var(--accent-strong);outline-offset:3px}@media (width<=950px){.workspace-grid{grid-template-columns:1fr}.app-header{flex-wrap:wrap;gap:18px;position:static}.header-actions{gap:8px}}@media (width<=600px){.page-content{padding:14px}.card{padding:16px}.sample-pair{grid-template-columns:1fr}.header-link,.user-chip,.role-chip{font-size:12px}}
