@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500&display=swap');

  :root {
    --bg: #0a0a0b;
    --surface: #111113;
    --surface-hover: #18181b;
    --border: #222225;
    --border-active: #333338;
    --text-primary: #e8e8ec;
    --text-secondary: #9a9aa0;
    --text-dim: #636369;
    --text-body: #b0b0b8;
    --accent: #c4c4cc;
    --accent-glow: rgba(196, 196, 204, 0.06);
    --mono: 'JetBrains Mono', monospace;
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--mono);
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* Subtle scanline overlay */
  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.03) 2px,
      rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
    z-index: 1000;
  }

  .container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ---- HEADER ---- */
  header {
    padding: 80px 0 60px;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    animation: fadeIn 1.2s ease forwards;
  }

  .header-mark {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
  }


  .header-mark h1 {
    font-family: var(--mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.35em;
    color: var(--text-primary);
    text-transform: uppercase;
  }

  .header-mark .version {
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 300;
    color: var(--text-dim);
    letter-spacing: 0.1em;
  }

  .header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 40px;
  }

  .status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #4a9; 
    animation: pulse 3s ease-in-out infinite;
  }

  .status-text {
    font-size: 0.7rem;
    font-weight: 300;
    color: var(--text-dim);
    letter-spacing: 0.08em;
  }

  .header-meta {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .meta-line {
    font-size: 0.7rem;
    font-weight: 300;
    color: var(--text-dim);
    letter-spacing: 0.02em;
  }

  .meta-line span {
    color: var(--text-secondary);
  }

  /* ---- PROMPT LIST ---- */
  .prompt-list {
    padding: 40px 0 120px;
  }

  .prompt-item {
    border-bottom: 1px solid var(--border);
    opacity: 0;
    animation: slideUp 0.6s ease forwards;
  }

  .prompt-item:nth-child(1) { animation-delay: 0.3s; }
  .prompt-item:nth-child(2) { animation-delay: 0.45s; }
  .prompt-item:nth-child(3) { animation-delay: 0.6s; }
  .prompt-item:nth-child(4) { animation-delay: 0.75s; }
  .prompt-item:nth-child(5) { animation-delay: 0.9s; }
  .prompt-item:nth-child(6) { animation-delay: 1.05s; }
  .prompt-item:nth-child(7) { animation-delay: 1.2s; }

  .prompt-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 32px 0;
    cursor: pointer;
    transition: background 0.2s ease;
    user-select: none;
    gap: 20px;
  }

  .prompt-header:hover .prompt-title {
    color: var(--text-primary);
  }

  .prompt-left {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
  }

  .prompt-number {
    font-size: 0.55rem;
    font-weight: 300;
    color: #707078;
    letter-spacing: 0.25em;
    font-family: var(--mono);
  }

  .prompt-title {
    font-family: var(--mono);
    font-size: 0.9rem;
    font-weight: 400;
    color: #b8b8c0;
    line-height: 1.45;
    transition: color 0.3s ease;
    letter-spacing: 0.01em;
  }

  .prompt-expand {
    font-size: 0.85rem;
    color: #707078;
    transition: transform 0.4s ease, color 0.3s ease;
    margin-top: 10px;
    flex-shrink: 0;
  }

  .prompt-item.active .prompt-expand {
    transform: rotate(45deg);
    color: var(--text-secondary);
  }

  .prompt-item.active .prompt-title {
    color: var(--text-primary);
  }

  .prompt-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
    opacity: 0;
  }

  .prompt-item.active .prompt-body {
    opacity: 1;
  }

  .prompt-content {
    padding: 0 0 40px;
  }

  .prompt-sender {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-bottom: 6px;
  }

  .prompt-recipient {
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
  }

  .prompt-text {
    font-family: var(--mono);
    font-size: 0.8rem;
    line-height: 1.9;
    color: var(--text-body);
    font-weight: 300;
  }

  .prompt-text p {
    margin-bottom: 1.2em;
  }

  .prompt-text p:last-child {
    margin-bottom: 0;
  }

  /* ---- AUDIO PLAYER ---- */
  .audio-player {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    margin-bottom: 28px;
    background: #141416;
    border: 1px solid #2a2a2e;
    border-radius: 6px;
  }

  .audio-btn {
    width: 36px;
    height: 36px;
    border: 1.5px solid #636369;
    border-radius: 50%;
    background: transparent;
    color: #b0b0b8;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
    flex-shrink: 0;
    padding: 0;
    padding-left: 2px;
    line-height: 1;
  }

  .audio-btn:hover {
    border-color: #b0b0b8;
    color: #e8e8ec;
    background: rgba(255,255,255,0.04);
  }

  .audio-btn.playing {
    border-color: #b0b0b8;
    color: #e8e8ec;
    padding-left: 0;
  }

  .audio-progress-wrap {
    flex: 1;
    height: 4px;
    background: #2a2a2e;
    border-radius: 2px;
    cursor: pointer;
    position: relative;
  }

  .audio-progress {
    height: 100%;
    background: #636369;
    border-radius: 2px;
    width: 0%;
    transition: background 0.3s ease;
  }

  .audio-player.active .audio-progress {
    background: #b0b0b8;
  }

  .audio-player.active {
    border-color: #3a3a3e;
  }

  .audio-time {
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 400;
    color: #9a9aa0;
    letter-spacing: 0.05em;
    min-width: 80px;
    text-align: right;
    flex-shrink: 0;
  }

  .audio-label {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    color: #b0b0b8;
    text-transform: uppercase;
    flex-shrink: 0;
  }

  /* ---- FOOTER ---- */
  .site-footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
    opacity: 0;
    animation: fadeIn 1s ease forwards;
    animation-delay: 1.2s;
  }

  .footer-text {
    font-size: 0.65rem;
    font-weight: 300;
    color: var(--text-dim);
    letter-spacing: 0.1em;
  }

  /* ---- ANIMATIONS ---- */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes slideUp {
    from { 
      opacity: 0;
      transform: translateY(12px);
    }
    to { 
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
  }

  /* ---- RESPONSIVE ---- */
  @media (max-width: 600px) {
    header {
      padding: 48px 0 36px;
    }

    .header-mark h1 {
      font-size: 0.75rem;
    }

    .prompt-header {
      padding: 26px 0;
    }

    .prompt-number {
      font-size: 0.6rem;
    }

    .prompt-title {
      font-size: 0.8rem;
    }

    .prompt-text {
      font-size: 0.75rem;
      line-height: 1.8;
    }

    .prompt-list {
      padding: 20px 0 80px;
    }

    .prompt-content {
      padding: 0 0 32px;
    }

    .audio-player {
      padding: 12px 14px;
      gap: 10px;
    }

    .audio-btn {
      width: 32px;
      height: 32px;
    }

    .audio-label {
      font-size: 0.55rem;
    }

    .audio-time {
      font-size: 0.55rem;
      min-width: 65px;
    }

    .container {
      padding: 0 20px;
    }
  }