/* level-4.css — extracted from inline <style> blocks. Generated by scripts/h1-extract.mjs */
/* Palette is provided by .arena-skin in agent-arena.css — amber + cyan.
         Local extensions below cover the vault-specific visuals (glass panes,
         shatter animation, status bar, victory overlay, leaderboard). */
      :root {
        --glass: rgba(180, 220, 255, 0.12);
        --glass-edge: rgba(180, 220, 255, 0.35);
        --cyan: rgba(0, 229, 255, 0.85);
        --cyan-glow: rgba(0, 229, 255, 0.22);
      }
      body { padding-top: 64px; }
      .course-wrap { max-width: 1000px; margin: 0 auto; padding: 60px 24px 120px; position: relative; z-index: 2; }
      .back-link {
        display: inline-block;
        margin-bottom: 14px;
        color: var(--text-dim);
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        letter-spacing: 2px;
        text-transform: uppercase;
        text-decoration: none;
        border: 1px solid var(--green-dark);
        padding: 8px 14px;
        background: var(--bg-card);
        transition: border-color 0.2s, color 0.2s;
      }
      .back-link:hover { border-color: var(--green); color: var(--green); }

      /* === Training-ground hero (image-backed) === */
      .level-hero {
        position: relative;
        width: 100%;
        aspect-ratio: 16 / 9;
        max-height: 360px;
        background: #080510 center / cover no-repeat;
        border: 1px solid var(--green-dark);
        margin-bottom: 22px;
        overflow: hidden;
      }
      .level-hero::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(8, 5, 16, 0) 38%, rgba(8, 5, 16, 0.94) 100%);
        pointer-events: none;
        z-index: 1;
      }
      .level-hero .spotlight {
        position: absolute;
        inset: 0;
        pointer-events: none;
        background: radial-gradient(ellipse 55% 70% at 50% 0%, var(--cyan-glow) 0%, rgba(0, 229, 255, 0.08) 30%, rgba(0, 0, 0, 0) 65%);
        mix-blend-mode: screen;
        animation: spotlight-flicker 5.4s ease-in-out infinite;
        z-index: 1;
      }
      .level-hero .sparkle {
        position: absolute;
        inset: 0;
        pointer-events: none;
        background: linear-gradient(115deg, rgba(0, 229, 255, 0) 42%, rgba(0, 229, 255, 0.16) 50%, rgba(0, 229, 255, 0) 58%);
        transform: translateX(-120%);
        animation: sparkle-sweep 7.8s ease-in-out infinite;
        mix-blend-mode: screen;
        z-index: 1;
      }
      .level-hero .hero-text {
        position: absolute;
        left: 0;
        right: 0;
        bottom: 22px;
        text-align: center;
        z-index: 2;
        padding: 0 16px;
      }
      .level-hero .hero-text .tag {
        color: var(--green);
        font-size: 12px;
        letter-spacing: 3px;
        text-transform: uppercase;
        text-shadow: 0 0 8px rgba(0, 0, 0, 0.9);
      }
      .level-hero .hero-text h1 {
        font-size: 56px;
        color: var(--green);
        text-shadow:
          0 0 18px rgba(0, 0, 0, 0.95),
          0 0 28px var(--green-glow-strong);
        margin: 6px 0 0;
        letter-spacing: 3px;
      }
      @keyframes spotlight-flicker {
        0%, 100% { opacity: 1; }
        12% { opacity: 0.82; }
        14% { opacity: 1; }
        38% { opacity: 0.9; }
        40% { opacity: 1; }
        62% { opacity: 0.78; }
        64% { opacity: 1; }
        88% { opacity: 0.94; }
      }
      @keyframes sparkle-sweep {
        0%, 74%   { transform: translateX(-120%); }
        84%, 100% { transform: translateX(120%); }
      }

      .course-header {
        border: 1px solid var(--green-dark);
        background: var(--bg-card);
        padding: 24px 28px;
        margin-bottom: 24px;
      }
      .course-header p {
        color: var(--text-dim);
        font-size: 13px;
        line-height: 1.75;
        margin: 0 0 14px;
      }
      .course-header .briefing {
        border-left: 2px solid var(--green);
        background: var(--bg-terminal);
        padding: 12px 16px;
        color: var(--text-dim);
        font-size: 12px;
        line-height: 1.75;
        margin-top: 14px;
      }
      .course-header .briefing code { color: var(--green); }

      .mythos-banner {
        border: 1px solid var(--green);
        background:
          radial-gradient(ellipse 80% 120% at 50% 0%, var(--green-glow) 0%, rgba(8, 5, 16, 0) 60%),
          var(--bg-card);
        padding: 22px 26px;
        margin-bottom: 24px;
        position: relative;
        overflow: hidden;
      }
      .mythos-banner::before {
        content: "// PROJECT GLASSWING";
        position: absolute;
        top: 8px;
        right: 14px;
        font-size: 9px;
        letter-spacing: 2px;
        color: var(--text-muted);
      }
      .mythos-banner h2 {
        color: var(--green);
        font-size: 15px;
        letter-spacing: 2px;
        text-transform: uppercase;
        margin: 0 0 10px;
      }
      .mythos-banner p {
        color: var(--text-dim);
        font-size: 12px;
        line-height: 1.75;
        margin: 0 0 8px;
      }
      .mythos-banner p strong { color: var(--green); }
      .mythos-banner .reserved {
        display: inline-block;
        margin-top: 6px;
        border: 1px dashed var(--green);
        color: var(--green);
        padding: 6px 12px;
        font-size: 11px;
        letter-spacing: 2px;
        text-transform: uppercase;
      }

      .status-bar {
        display: flex;
        gap: 18px;
        padding: 12px 18px;
        border: 1px solid var(--green-dark);
        background: var(--bg-terminal);
        margin-bottom: 24px;
        font-size: 12px;
        align-items: center;
      }
      .status-bar .pulse {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--green);
        box-shadow: 0 0 10px var(--green);
        animation: pulse 1.6s ease-in-out infinite;
      }
      @keyframes pulse {
        0%, 100% { opacity: 0.45; }
        50% { opacity: 1; }
      }
      .status-bar.won .pulse { animation: none; opacity: 1; background: #00e5ff; box-shadow: 0 0 12px #00e5ff; }
      .status-bar.error .pulse { background: #ff5a5a; box-shadow: 0 0 12px #ff5a5a; }
      .status-bar .label { color: var(--text-muted); letter-spacing: 2px; text-transform: uppercase; margin-right: 6px; }
      .status-bar .val { color: var(--green); font-weight: 600; }

      /* === Vault arena === */
      .arena {
        border: 1px solid var(--green-dark);
        background: var(--bg-card);
        padding: 32px 28px;
        margin-bottom: 28px;
        position: relative;
      }
      .arena-label {
        position: absolute;
        top: -10px;
        left: 18px;
        background: var(--bg-card);
        padding: 0 10px;
        color: var(--text-muted);
        font-size: 10px;
        letter-spacing: 3px;
        text-transform: uppercase;
      }

      .vault-wrap {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 26px;
        align-items: start;
      }
      .vault-door {
        position: relative;
        aspect-ratio: 3 / 4;
        border: 2px solid var(--green);
        background:
          radial-gradient(ellipse 80% 100% at 50% 100%, rgba(0, 229, 255, 0.10), transparent 60%),
          linear-gradient(180deg, var(--green-glow), rgba(255, 184, 77, 0.02));
        box-shadow:
          0 0 40px var(--green-glow-strong),
          inset 0 0 40px rgba(0, 0, 0, 0.6);
        padding: 14px;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(4, 1fr);
        gap: 6px;
      }
      .vault-door .pane {
        background: var(--glass);
        border: 1px solid var(--glass-edge);
        box-shadow:
          inset 0 0 10px rgba(180, 220, 255, 0.18),
          0 0 8px var(--cyan-glow);
        position: relative;
        transition: transform 1.1s cubic-bezier(0.2, 0.9, 0.3, 1), opacity 1.1s linear;
      }
      .vault-door .pane::before {
        content: "";
        position: absolute;
        inset: 8% 8% auto auto;
        width: 30%;
        height: 20%;
        background: linear-gradient(135deg, rgba(0, 229, 255, 0.35), rgba(255, 255, 255, 0));
        pointer-events: none;
      }
      .vault-door .lock-label {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        color: var(--green);
        font-size: 14px;
        letter-spacing: 3px;
        font-weight: 700;
        text-transform: uppercase;
        text-shadow: 0 0 12px rgba(0, 0, 0, 0.95);
        pointer-events: none;
        z-index: 2;
      }
      .vault-door.open .lock-label { color: #00e5ff; text-shadow: 0 0 16px #00e5ff; }
      .vault-door.open .pane { opacity: 0; }
      .vault-door.open .pane:nth-child(1)  { transform: translate(-40%, -60%) rotate(-18deg) scale(0.7); }
      .vault-door.open .pane:nth-child(2)  { transform: translate(0, -80%) rotate(6deg) scale(0.6); }
      .vault-door.open .pane:nth-child(3)  { transform: translate(45%, -55%) rotate(22deg) scale(0.7); }
      .vault-door.open .pane:nth-child(4)  { transform: translate(-55%, -20%) rotate(-12deg) scale(0.75); }
      .vault-door.open .pane:nth-child(5)  { transform: translate(10%, -15%) rotate(-3deg) scale(0.8); }
      .vault-door.open .pane:nth-child(6)  { transform: translate(55%, -5%) rotate(15deg) scale(0.7); }
      .vault-door.open .pane:nth-child(7)  { transform: translate(-45%, 30%) rotate(8deg) scale(0.65); }
      .vault-door.open .pane:nth-child(8)  { transform: translate(5%, 45%) rotate(-14deg) scale(0.7); }
      .vault-door.open .pane:nth-child(9)  { transform: translate(50%, 25%) rotate(18deg) scale(0.6); }
      .vault-door.open .pane:nth-child(10) { transform: translate(-50%, 60%) rotate(-20deg) scale(0.7); }
      .vault-door.open .pane:nth-child(11) { transform: translate(0, 70%) rotate(3deg) scale(0.6); }
      .vault-door.open .pane:nth-child(12) { transform: translate(48%, 55%) rotate(12deg) scale(0.65); }

      .vault-panel {
        display: flex;
        flex-direction: column;
        gap: 14px;
      }
      .vault-panel label {
        color: var(--text-muted);
        font-size: 10px;
        letter-spacing: 2px;
        text-transform: uppercase;
      }
      .vault-panel textarea {
        width: 100%;
        min-height: 110px;
        background: var(--bg-terminal);
        border: 1px solid var(--green-dark);
        color: var(--green);
        font-family: "JetBrains Mono", monospace;
        font-size: 12px;
        padding: 10px 12px;
        line-height: 1.6;
        resize: vertical;
        outline: none;
      }
      .vault-panel textarea:focus { border-color: var(--green); }
      .vault-panel .row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
      }
      .vault-panel button {
        background: var(--bg);
        color: var(--green);
        border: 1px solid var(--green-muted);
        padding: 12px 16px;
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 2px;
        cursor: pointer;
        transition: background 0.15s, border-color 0.15s;
      }
      .vault-panel button:hover { background: var(--green-dark); border-color: var(--green); }
      .vault-panel .msg {
        min-height: 36px;
        font-size: 11px;
        color: var(--text-dim);
        border-left: 2px solid var(--green-dark);
        padding: 8px 12px;
        background: var(--bg-terminal);
        line-height: 1.6;
      }
      .vault-panel .msg.deny { color: #ff8a8a; border-left-color: #ff5a5a; }
      .vault-panel .msg.ok { color: #00e5ff; border-left-color: #00e5ff; }

      .decoy-controls {
        margin-top: 22px;
        padding: 14px 16px;
        border: 1px dashed var(--green-dark);
        background: var(--bg-terminal);
      }
      .decoy-controls p { color: var(--text-muted); font-size: 10px; margin: 0 0 8px; letter-spacing: 1px; }
      .decoy-controls .row { display: flex; gap: 8px; flex-wrap: wrap; }
      .decoy-controls input {
        background: var(--bg);
        border: 1px solid var(--green-dark);
        color: var(--text-dim);
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        padding: 8px 10px;
        width: 220px;
      }
      .decoy-controls button {
        background: transparent;
        color: var(--text-dim);
        border: 1px solid var(--green-dark);
        padding: 7px 12px;
        font-family: "JetBrains Mono", monospace;
        font-size: 10px;
        text-transform: uppercase;
        letter-spacing: 1px;
        cursor: pointer;
      }
      .decoy-controls button:hover { border-color: var(--green-muted); color: var(--text-dim); }

      .dev-notes {
        margin-top: 22px;
        padding: 14px 18px;
        border: 1px solid var(--green-dark);
        background: var(--bg-terminal);
        color: var(--text-muted);
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        line-height: 1.9;
      }
      .dev-notes .heading { color: var(--green); margin-bottom: 6px; letter-spacing: 2px; }

      .victory {
        position: fixed;
        inset: 0;
        background: rgba(8, 5, 16, 0.92);
        backdrop-filter: blur(6px);
        display: none;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        z-index: 1000;
        padding: 20px;
      }
      .victory.shown { display: flex; }
      .victory h2 {
        color: var(--green);
        font-size: 52px;
        letter-spacing: 4px;
        text-transform: uppercase;
        text-shadow: 0 0 24px var(--green-glow-strong);
        margin-bottom: 10px;
      }
      .victory p { color: var(--text-dim); font-size: 14px; text-align: center; max-width: 420px; line-height: 1.7; }
      .victory .time { color: var(--green); font-size: 24px; margin: 18px 0; font-weight: 600; }
      .victory .submit-panel {
        border: 1px solid var(--green);
        background: var(--bg-card);
        padding: 22px 26px;
        margin: 18px 0;
        min-width: 380px;
        max-width: 440px;
      }
      .victory .submit-panel label {
        display: block;
        color: var(--text-muted);
        font-size: 10px;
        letter-spacing: 2px;
        text-transform: uppercase;
        margin: 8px 0 4px;
      }
      .victory .submit-panel input {
        width: 100%;
        background: var(--bg-terminal);
        border: 1px solid var(--green-dark);
        color: var(--green);
        font-family: "JetBrains Mono", monospace;
        font-size: 12px;
        padding: 10px 12px;
        margin-bottom: 6px;
        outline: none;
      }
      .victory .submit-panel input:focus { border-color: var(--green); }
      .victory .submit-panel button {
        width: 100%;
        background: var(--bg);
        color: var(--green);
        border: 1px solid var(--green);
        padding: 12px 16px;
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 2px;
        cursor: pointer;
        margin-top: 10px;
      }
      .victory .submit-panel button:disabled { color: var(--text-muted); border-color: var(--green-dark); cursor: not-allowed; }
      .victory .submit-panel button:not(:disabled):hover { background: var(--green-dark); }
      .victory .submit-panel .err { color: #ff7a7a; font-size: 11px; margin-top: 8px; min-height: 14px; }
      .victory .submit-panel .rank { color: var(--green); font-size: 13px; margin-top: 10px; text-align: center; }
      .victory > button {
        margin-top: 14px;
        background: transparent;
        color: var(--text-dim);
        border: 1px solid var(--green-dark);
        padding: 10px 18px;
        font-family: "JetBrains Mono", monospace;
        font-size: 10px;
        text-transform: uppercase;
        letter-spacing: 2px;
        cursor: pointer;
      }
      .victory > button:hover { border-color: var(--green); color: var(--green); }

      .leaderboard {
        border: 1px solid var(--green-dark);
        background: var(--bg-card);
        padding: 24px 28px;
        margin-top: 28px;
      }
      .leaderboard h3 {
        color: var(--green);
        font-size: 14px;
        letter-spacing: 3px;
        text-transform: uppercase;
        margin-bottom: 12px;
      }
      .leaderboard .class-tabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
      .leaderboard .class-tabs button {
        background: transparent;
        color: var(--text-muted);
        border: 1px solid var(--green-dark);
        padding: 8px 14px;
        font-family: "JetBrains Mono", monospace;
        font-size: 11px;
        cursor: pointer;
        text-transform: uppercase;
        letter-spacing: 1px;
      }
      .leaderboard .class-tabs button.active { color: var(--green); border-color: var(--green); background: var(--bg); }
      .leaderboard table { width: 100%; border-collapse: collapse; font-size: 12px; }
      .leaderboard th, .leaderboard td {
        text-align: left;
        padding: 8px 10px;
        border-bottom: 1px solid var(--green-dark);
      }
      .leaderboard th { color: var(--text-muted); text-transform: uppercase; font-size: 10px; letter-spacing: 1px; }
      .leaderboard td { color: var(--white); }
      .leaderboard .empty { color: var(--text-muted); font-size: 12px; text-align: center; padding: 16px; }
      .leaderboard .rank-col { color: var(--green); width: 40px; }
      .leaderboard .time-col { color: var(--green); text-align: right; font-weight: 600; }
      .leaderboard .reserved-row {
        background: rgba(255, 184, 77, 0.06);
      }
      .leaderboard .reserved-row td {
        color: var(--green);
        letter-spacing: 2px;
        text-transform: uppercase;
        font-size: 11px;
        border-bottom-color: var(--green);
      }
      .leaderboard .reserved-row td:first-child { color: var(--green); }

      @media (max-width: 760px) {
        .course-wrap { padding: 32px 14px 60px; }
        .level-hero { max-height: 220px; margin-bottom: 18px; }
        .level-hero .hero-text { bottom: 14px; }
        .level-hero .hero-text h1 { font-size: 28px; letter-spacing: 1px; }
        .level-hero .hero-text .tag { font-size: 10px; letter-spacing: 2px; }
        .back-link { font-size: 10px; padding: 7px 12px; }
        .course-header { padding: 18px 18px; }
        .course-header p { font-size: 12px; }
        .course-header .briefing { font-size: 11px; padding: 10px 12px; }
        .mythos-banner { padding: 18px 18px; }
        .mythos-banner h2 { font-size: 13px; }
        .mythos-banner p { font-size: 11px; }
        .arena { padding: 22px 16px; }
        .vault-wrap { grid-template-columns: 1fr; gap: 18px; }
        .vault-door { max-width: 240px; margin: 0 auto; }
        .decoy-controls .row { flex-direction: column; }
        .decoy-controls input { width: 100%; }
        .dev-notes { font-size: 10px; padding: 12px 14px; }
        .victory h2 { font-size: 36px; }
        .victory p { font-size: 13px; }
        .victory .time { font-size: 18px; }
        .victory .submit-panel {
          min-width: auto;
          width: calc(100% - 32px);
          max-width: 360px;
          padding: 16px 18px;
        }
        .leaderboard { padding: 18px 16px; margin-top: 24px; }
        .leaderboard table { font-size: 11px; }
        .leaderboard th, .leaderboard td { padding: 6px 6px; }
        .leaderboard .class-tabs { flex-wrap: wrap; }
      }