:root {
    --ink: #F4EFE6;
    --ink-dim: #B7AFA0;
    --bg-0: #16171B;
    --bg-1: #1E2024;
    --bg-2: #24262B;
    --gold: #F2B705;
    --gold-dim: #8A6A17;
    --coral: #FF6B5E;
    --wire: #3A3D44;
    --radius: 3px;
  }

  * { box-sizing: border-box; }

  html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg-0);
    color: var(--ink);
    font-family: 'Space Mono', monospace;
    overflow-x: hidden;
  }

  body {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
    background-image:
      radial-gradient(circle at 50% 8%, rgba(242,183,5,0.07), transparent 55%),
      radial-gradient(circle at 85% 85%, rgba(255,107,94,0.04), transparent 50%);
  }

  /* subtle grain */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    mix-blend-mode: overlay;
  }

  /* faint filament-wire border frame, echoes the bulb */
  body::after {
    content: '';
    position: fixed;
    inset: 18px;
    pointer-events: none;
    border: 1px solid rgba(255,255,255,0.03);
    border-radius: 6px;
  }

  .rig {
    width: 100%;
    max-width: 560px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    position: relative;
    z-index: 1;
  }

  .eyebrow {
    font-size: 15px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--ink-dim);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .eyebrow::before, .eyebrow::after {
    content: '';
    height: 1px;
    width: 22px;
    background: var(--wire);
  }

  /* ---- Cord & socket ---- */
  .socket-rig {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: -6px;
  }

  .socket {
    width: 34px;
    height: 14px;
    background: linear-gradient(180deg, #2C2E33, #1A1B1E);
    border: 1px solid var(--wire);
    border-bottom: none;
    border-radius: 2px 2px 0 0;
  }

  .cord {
    width: 1.5px;
    height: 30px;
    background: var(--wire);
    transform-origin: top center;
  }

  .cord.tug {
    animation: tug 0.5s ease;
  }

  @keyframes tug {
    0% { height: 30px; }
    30% { height: 42px; }
    100% { height: 30px; }
  }

  .pull-ring {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1.5px solid var(--wire);
    margin-top: -1px;
    cursor: pointer;
    transition: border-color 0.4s ease;
  }

  .pull-ring.lit { border-color: var(--gold-dim); }

  .pull-ring:focus-visible,
  .bulb-wrap:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
    border-radius: 4px;
  }

  /* ---- The bulb ---- */
  .bulb-wrap {
    position: relative;
    width: 130px;
    height: 170px;
    margin-bottom: 4px;
  }

  .socket-glow {
    position: absolute;
    top: 55%;
    left: 50%;
    width: 220px;
    height: 220px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(242,183,5,0.16), transparent 68%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
  }

  .bulb-wrap.lit .socket-glow { opacity: 1; }

  svg#bulb { width: 100%; height: 100%; overflow: visible; position: relative; z-index: 1; cursor: pointer; }

  .bulb-wrap.off {
    opacity: 0.5;
  }

  .bulb-wrap.off .glow-core,
  .bulb-wrap.off .socket-glow {
    opacity: 0 !important;
  }

  .filament {
    stroke: var(--wire);
    stroke-width: 2.5;
    fill: none;
    stroke-linecap: round;
    transition: stroke 0.15s ease;
  }

  .glass {
    stroke: var(--wire);
    stroke-width: 1.5;
    fill: rgba(255,255,255,0.02);
    transition: fill 0.4s ease, stroke 0.4s ease;
  }

  .glow-core {
    opacity: 0;
    transition: opacity 0.4s ease;
  }

  .bulb-wrap.lit .filament {
    stroke: var(--gold);
    filter: drop-shadow(0 0 6px var(--gold));
  }
  .bulb-wrap.lit .glass {
    fill: rgba(242,183,5,0.06);
    stroke: var(--gold-dim);
  }
  .bulb-wrap.lit .glow-core {
    opacity: 1;
  }

  .bulb-wrap.charging .filament {
    animation: flicker 0.6s steps(6) infinite;
  }

  @keyframes flicker {
    0%, 100% { stroke: var(--wire); filter: none; }
    50% { stroke: var(--gold); filter: drop-shadow(0 0 4px var(--gold)); }
  }

  .switch-hint {
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ink-dim);
    opacity: 0.7;
    margin-top: 2px;
    margin-bottom: 4px;
  }
  .card {
    width: 100%;
    background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
    border: 1px solid var(--wire);
    border-radius: 6px;
    padding: 38px 34px 32px;
    margin-top: 22px;
    position: relative;
    min-height: 172px;
    box-shadow:
      0 24px 48px -24px rgba(0,0,0,0.55),
      inset 0 1px 0 rgba(255,255,255,0.02);
  }

  .card::before {
    content: '';
    position: absolute;
    top: -1px; left: 28px; right: 28px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
    opacity: 0.7;
  }

  .card-label {
    font-size: 10px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
    display: flex;
    align-items: baseline;
    gap: 10px;
    min-height: 12px;
  }

  .card-label .n {
    color: var(--ink-dim);
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: none;
    font-style: italic;
  }

  .idea-text {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 27px;
    line-height: 1.5;
    color: var(--ink);
    letter-spacing: 0;
  }

  .idea-text .empty-state {
    font-family: 'Space Mono', monospace;
    font-size: 14px;
    color: var(--ink-dim);
    font-style: italic;
  }

  .idea-text em {
    color: var(--coral);
    font-style: italic;
  }

  /* fade-in per word */
  .idea-text span {
    display: inline-block;
    opacity: 0;
    transform: translateY(6px);
    animation: rise 0.4s ease forwards;
  }
  @keyframes rise {
    to { opacity: 1; transform: translateY(0); }
  }

  /* ---- Switch / button ---- */
  .pull {
    margin-top: 30px;
    display: flex;
    align-items: center;
    gap: 18px;
  }

  .pull-btn {
    appearance: none;
    border: 1px solid var(--gold-dim);
    background: transparent;
    color: var(--gold);
    font-family: 'Space Mono', monospace;
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 14px 28px;
    border-radius: 3px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease, box-shadow 0.2s ease;
  }

  .pull-btn:hover {
    background: var(--gold);
    color: var(--bg-0);
    box-shadow: 0 6px 20px -6px rgba(242,183,5,0.4);
  }

  .pull-btn:active {
    transform: scale(0.97);
  }

  .pull-btn:disabled {
    opacity: 0.5;
    cursor: default;
  }

  .pull-btn:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
  }

  .power-btn {
    appearance: none;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--wire);
    background: var(--bg-1);
    color: var(--ink-dim);
    border-radius: 50%;
    cursor: pointer;
    position: absolute;
    top: 50%;
    right: -6px;
    transform: translateY(-50%);
    z-index: 2;
    box-shadow: 0 4px 12px -4px rgba(0,0,0,0.5);
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .power-btn:hover {
    border-color: var(--gold-dim);
    color: var(--ink);
  }

  .power-btn.is-on {
    background: var(--gold);
    border-color: var(--gold);
    color: var(--bg-0);
    box-shadow: 0 6px 20px -6px rgba(242,183,5,0.45);
  }

  .power-btn:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
  }

  .count {
    font-size: 11px;
    color: var(--ink-dim);
    letter-spacing: 0.12em;
    font-variant-numeric: tabular-nums;
  }

  @media (prefers-reduced-motion: reduce) {
    .idea-text span { animation: none; opacity: 1; transform: none; }
    .bulb-wrap.charging .filament { animation: none; }
  }

  @media (max-width: 420px) {
    .idea-text { font-size: 21px; }
    .card { padding: 28px 22px 24px; }
    .eyebrow { letter-spacing: 0.18em; text-align: center; justify-content: center; }
    .eyebrow::before, .eyebrow::after { display: none; }
    .eyebrow-text { text-align: center; }
    .eyebrow-sep { display: none; }
    .eyebrow-line2 { display: block; margin-top: 6px; }
  }