:root {
      --bg: #0f172a;
      --bg-soft: #111827;
      --accent: #facc15;
      --accent-soft: rgba(250, 204, 21, 0.12);
      --text: #e5e7eb;
      --muted: #9ca3af;
      --border: #1f2933;
      --radius: 0.75rem;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
        sans-serif;
      background: radial-gradient(circle at top left, #1f2937, #020617 55%);
      color: var(--text);
    }

    .page {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 2rem 1.5rem;
    }

    .shell {
      width: 100%;
      max-width: 960px;
      background: linear-gradient(135deg, #020617, #020617) padding-box,
                  linear-gradient(135deg, rgba(148, 163, 184, 0.6), rgba(251, 191, 36, 0.9)) border-box;
      border-radius: 1.5rem;
      border: 1px solid transparent;
      box-shadow:
        0 40px 80px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(15, 23, 42, 0.9);
      padding: 2rem 2.25rem 1.75rem;
      display: grid;
      gap: 1.5rem;
    }

    header {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    header h1 {
      margin: 0;
      font-size: clamp(1.4rem, 2vw + 1rem, 1.9rem);
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    header .tag {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.22em;
      padding: 0.25rem 0.9rem;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.5);
      background: radial-gradient(circle at top left, rgba(148, 163, 184, 0.2), transparent);
      color: var(--muted);
      white-space: nowrap;
    }

    a {
      color: var(--accent);
      text-decoration: none;
      border-radius: 999px;
      padding: 0.4rem 1.1rem;
      border: 1px solid rgba(250, 204, 21, 0.4);
      background: radial-gradient(circle at top left, var(--accent-soft), transparent);
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }

    a::before {
      content: "⟵";
      font-size: 0.8em;
    }

    a:hover {
      background-color: rgba(250, 204, 21, 0.18);
      box-shadow: 0 0 0 1px rgba(250, 204, 21, 0.25);
    }

    main {
      display: grid;
      gap: 1.5rem;
    }

    blockquote {
      margin: 0;
      padding: 1rem 1.2rem;
      border-radius: var(--radius);
      background-color: rgba(15, 23, 42, 0.95);
      border: 1px solid rgba(148, 163, 184, 0.6);
      font-size: 0.9rem;
      line-height: 1.5;
      position: relative;
    }

    blockquote::before {
      content: "“";
      position: absolute;
      left: 0.6rem;
      top: -0.9rem;
      font-size: 2.5rem;
      color: rgba(148, 163, 184, 0.4);
    }

    button {
      padding: 0.6rem 1.4rem;
      border-radius: 999px;
      border: 1px solid rgba(250, 204, 21, 0.7);
      background: radial-gradient(circle at top left, #facc15, #f97316);
      color: #111827;
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      cursor: pointer;
      box-shadow:
        0 12px 25px rgba(0, 0, 0, 0.75),
        0 0 0 1px rgba(15, 23, 42, 0.9);
      transform: translateY(0);
      transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
    }

    button:hover {
      transform: translateY(-1px);
      filter: brightness(1.05);
      box-shadow:
        0 16px 40px rgba(0, 0, 0, 0.85),
        0 0 0 1px rgba(250, 204, 21, 0.4);
    }

    button:active {
      transform: translateY(1px);
      box-shadow:
        0 8px 18px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(250, 204, 21, 0.4);
    }

    .divc,
    .plain-div {
      padding: 0.9rem 1rem;
      border-radius: var(--radius);
      background-color: rgba(15, 23, 42, 0.96);
      border: 1px dashed rgba(148, 163, 184, 0.6);
      font-size: 0.9rem;
      line-height: 1.4;
    }

    .divc {
      border-style: solid;
      border-image: linear-gradient(135deg, rgba(250, 204, 21, 0.7), rgba(56, 189, 248, 0.6)) 1;
      background-image:
        radial-gradient(circle at top left, rgba(250, 204, 21, 0.13), transparent),
        radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.13), transparent),
        linear-gradient(135deg, rgba(15, 23, 42, 1), rgba(15, 23, 42, 0.98));
    }

    .heading-block {
      padding: 0.8rem 1rem 1rem;
      border-radius: var(--radius);
      background-color: rgba(15, 23, 42, 0.92);
      border: 1px solid rgba(31, 41, 55, 0.9);
      display: grid;
      gap: 0.25rem;
    }

    .heading-block h1,
    .heading-block h2,
    .heading-block h3,
    .heading-block h4,
    .heading-block h5,
    .heading-block h6 {
      margin: 0;
      font-weight: 600;
    }

    .heading-block h1 { font-size: 1.6rem; }
    .heading-block h2 { font-size: 1.3rem; color: var(--muted); }
    .heading-block h3 { font-size: 1.1rem; }
    .heading-block h4 { font-size: 1rem; color: var(--muted); }
    .heading-block h5 { font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.08em; }
    .heading-block h6 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted); }

    hr {
      border: none;
      border-top: 1px solid rgba(55, 65, 81, 0.8);
      margin: 1rem 0;
    }

    .nicehr {
      border: none;
      border-top: 1px solid rgba(250, 204, 21, 0.5);
      box-shadow: 0 0 18px rgba(250, 204, 21, 0.25);
      margin-top: 0.3rem;
    }

    .list-block {
      padding: 0.75rem 1rem;
      border-radius: var(--radius);
      border: 1px solid rgba(31, 41, 55, 0.9);
      background-color: rgba(15, 23, 42, 0.96);
      font-size: 0.9rem;
    }

    .list-block h3 {
      margin: 0 0 0.4rem;
      font-size: 0.9rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--muted);
    }

    .list-block ul {
      margin: 0;
      padding-left: 1.2rem;
    }

    .list-block li {
      margin: 0.2rem 0;
    }

    p {
      margin: 0;
      font-size: 0.92rem;
      line-height: 1.6;
      color: var(--muted);
    }

    span {
      display: inline-block;
      padding: 0.15rem 0.4rem;
      border-radius: 0.4rem;
      background-color: rgba(148, 163, 184, 0.12);
      border: 1px solid rgba(148, 163, 184, 0.35);
      font-size: 0.85rem;
      margin-top: 0.35rem;
    }

    details {
      margin-top: 0.6rem;
      border-radius: var(--radius);
      background-color: rgba(15, 23, 42, 0.96);
      border: 1px solid rgba(31, 41, 55, 0.9);
      padding: 0.7rem 0.9rem;
      font-size: 0.9rem;
    }

    summary {
      cursor: pointer;
      list-style: none;
      outline: none;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 500;
    }

    summary::before {
      content: "▸";
      font-size: 0.75rem;
      opacity: 0.7;
      transition: transform 0.15s ease;
    }

    details[open] summary::before {
      transform: rotate(90deg);
    }

    .footer {
      margin-top: 0.5rem;
      border-radius: 1.1rem;
      padding: 0.75rem 1rem;
      background: linear-gradient(135deg, rgba(148, 27, 53, 0.92), rgba(239, 68, 68, 0.92));
      color: #fef2f2;
      font-size: 0.85rem;
      line-height: 1.5;
      display: flex;
      align-items: flex-start;
      gap: 0.6rem;
      box-shadow:
        0 16px 38px rgba(127, 29, 29, 0.85),
        0 0 0 1px rgba(148, 27, 53, 0.8);
    }

    .footer::before {
      content: "⚠";
      font-size: 1rem;
      margin-top: 0.1rem;
    }

    @media (max-width: 640px) {
      .shell {
        padding: 1.6rem 1.3rem 1.3rem;
        border-radius: 1.1rem;
      }
    }