:root {
        --orange: #ff6b00;
        --orange-bright: #ff8c2a;
        --orange-dim: #cc5500;
        --orange-tint: rgba(255, 107, 0, 0.07);
        --black: #080808;
        --black-2: #0e0e0e;
        --black-3: #141414;
        --black-4: #1c1c1c;
        --grid: rgba(255, 107, 0, 0.03);
        --text: #e8e0d8;
        --text-dim: #7a7268;
        --text-mid: #a89e94;
        --border: rgba(255, 107, 0, 0.1);
        --border-bright: rgba(255, 107, 0, 0.22);
        --sidebar-w: 260px;
        --nav-h: 60px;
        --green: #3daa6a;
        --blue: #4a90d9;
        --purple: #9b6dca;
      }

      *,
      *::before,
      *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }
      html {
        scroll-behavior: smooth;
      }

      body {
        background: var(--black);
        color: var(--text);
        font-family: "Syne", sans-serif;
        overflow-x: hidden;
      }

      body::before {
        content: "";
        position: fixed;
        inset: 0;
        background-image:
          linear-gradient(var(--grid) 1px, transparent 1px),
          linear-gradient(90deg, var(--grid) 1px, transparent 1px);
        background-size: 48px 48px;
        pointer-events: none;
        z-index: 0;
      }

      ::-webkit-scrollbar {
        width: 3px;
      }
      ::-webkit-scrollbar-track {
        background: var(--black);
      }
      ::-webkit-scrollbar-thumb {
        background: var(--orange-dim);
      }

      /* ── TOP NAV ── */
      .topnav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--nav-h);
        z-index: 200;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
        background: rgba(8, 8, 8, 0.95);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
      }

      .topnav-left {
        display: flex;
        align-items: center;
        gap: 12px;
      }

      /* hamburger button */
      .menu-toggle {
        background: none;
        border: 1px solid var(--border);
        color: var(--text);
        font-size: 20px;
        cursor: pointer;
        padding: 5px 10px;
        border-radius: 4px;
        display: none;
        transition: all 0.2s;
      }
      .menu-toggle:hover {
        border-color: var(--orange);
        color: var(--orange);
      }

      .logo {
        font-family: "Orbitron", monospace;
        font-size: 13px;
        font-weight: 700;
        color: var(--orange);
        text-decoration: none;
        letter-spacing: 0.1em;
        display: flex;
        align-items: center;
        gap: 8px;
      }
      .logo span {
        color: var(--text-dim);
        font-weight: 400;
      }

      .nav-sep {
        width: 1px;
        height: 18px;
        background: var(--border);
      }

      .nav-pkg {
        font-family: "IBM Plex Mono", monospace;
        font-size: 12px;
        color: var(--text-mid);
      }
      .nav-pkg strong {
        color: var(--orange);
        font-weight: 500;
      }

      .topnav-right {
        display: flex;
        align-items: center;
        gap: 16px;
      }
      .topnav-right a {
        font-family: "IBM Plex Mono", monospace;
        font-size: 10px;
        letter-spacing: 0.12em;
        color: var(--text-dim);
        text-decoration: none;
        text-transform: uppercase;
        transition: color 0.2s;
      }
      .topnav-right a:hover {
        color: var(--orange);
      }

      .version-tag {
        font-family: "IBM Plex Mono", monospace;
        font-size: 10px;
        padding: 3px 8px;
        border: 1px solid var(--border-bright);
        color: var(--orange);
        letter-spacing: 0.1em;
      }

      /* ── LAYOUT ── */
      .layout {
        display: flex;
        padding-top: var(--nav-h);
        min-height: 100vh;
        position: relative;
        z-index: 1;
      }

      /* ── SIDEBAR (off-canvas en móvil) ── */
      .sidebar {
        width: var(--sidebar-w);
        flex-shrink: 0;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        bottom: 0;
        overflow-y: auto;
        border-right: 1px solid var(--border);
        background: rgba(8, 8, 8, 0.96);
        backdrop-filter: blur(16px);
        padding: 24px 0 48px;
        z-index: 150;
        transition: transform 0.25s ease;
        transform: translateX(0);
      }
      .sidebar::-webkit-scrollbar {
        width: 2px;
      }

      /* overlay para móvil */
      .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 140;
        display: none;
      }
      .sidebar-overlay.active {
        display: block;
      }

      .sidebar-group {
        margin-bottom: 20px;
      }
      .sidebar-group-label {
        font-family: "IBM Plex Mono", monospace;
        font-size: 9px;
        letter-spacing: 0.3em;
        text-transform: uppercase;
        color: var(--orange-dim);
        padding: 0 18px 8px;
        display: block;
      }
      .sidebar-link {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 7px 18px;
        font-family: "IBM Plex Mono", monospace;
        font-size: 12px;
        color: var(--text-dim);
        text-decoration: none;
        cursor: pointer;
        border-left: 2px solid transparent;
        transition:
          color 0.15s,
          background 0.15s,
          border-color 0.15s;
        user-select: none;
      }
      .sidebar-link:hover {
        color: var(--text);
        background: var(--orange-tint);
      }
      .sidebar-link.active {
        color: var(--orange);
        border-left-color: var(--orange);
        background: var(--orange-tint);
      }

      .stag {
        font-size: 8px;
        padding: 2px 5px;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        margin-left: auto;
        flex-shrink: 0;
      }
      .stag-io {
        background: rgba(74, 144, 217, 0.12);
        color: #4a90d9;
        border: 1px solid rgba(74, 144, 217, 0.22);
      }
      .stag-agg {
        background: rgba(61, 170, 106, 0.1);
        color: #3daa6a;
        border: 1px solid rgba(61, 170, 106, 0.2);
      }
      .stag-tf {
        background: rgba(155, 109, 202, 0.1);
        color: #9b6dca;
        border: 1px solid rgba(155, 109, 202, 0.2);
      }

      /* ── MAIN ── */
      .main {
        margin-left: var(--sidebar-w);
        flex: 1;
        padding: 52px 64px 100px;
        max-width: 860px;
        min-height: calc(100vh - var(--nav-h));
        transition: margin 0.2s;
      }

      /* ── PAGES ── */
      .page {
        display: none;
        animation: fadeIn 0.2s ease;
      }
      .page.active {
        display: block;
      }
      @keyframes fadeIn {
        from {
          opacity: 0;
          transform: translateY(8px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      /* ── PAGE HEADER ── */
      .page-header {
        margin-bottom: 44px;
        padding-bottom: 32px;
        border-bottom: 1px solid var(--border);
      }
      .page-eyebrow {
        font-family: "IBM Plex Mono", monospace;
        font-size: 10px;
        letter-spacing: 0.25em;
        color: var(--orange);
        text-transform: uppercase;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 10px;
      }
      .page-eyebrow::before {
        content: "";
        display: block;
        width: 20px;
        height: 1px;
        background: var(--orange);
      }
      .page-title {
        font-family: "Orbitron", monospace;
        font-size: 32px;
        font-weight: 700;
        letter-spacing: -0.01em;
        margin-bottom: 14px;
        line-height: 1.1;
      }
      .page-title .accent {
        color: var(--orange);
      }
      .page-desc {
        font-size: 15px;
        font-weight: 300;
        color: var(--text-mid);
        line-height: 1.75;
        max-width: 580px;
      }

      /* method cards */
      .method {
        margin-bottom: 28px;
        border: 1px solid var(--border);
        background: var(--black-2);
        overflow: hidden;
        transition: border-color 0.2s;
      }
      .method:hover {
        border-color: var(--border-bright);
      }
      .method-header {
        padding: 16px 22px;
        background: var(--black-3);
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: wrap;
      }
      .method-sig {
        font-family: "IBM Plex Mono", monospace;
        font-size: 13px;
        color: var(--text);
        line-height: 1.5;
      }
      .method-sig .fn {
        color: var(--orange);
        font-weight: 500;
      }
      .method-sig .prm {
        color: var(--blue);
      }
      .method-sig .typ {
        color: var(--text-dim);
        font-size: 11px;
      }
      .method-sig .ret {
        color: var(--green);
      }
      .method-sig .kw {
        color: var(--purple);
      }
      .method-kind {
        font-family: "IBM Plex Mono", monospace;
        font-size: 9px;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        padding: 3px 8px;
        border: 1px solid var(--border);
        color: var(--text-dim);
        flex-shrink: 0;
      }
      .method-kind.static {
        color: var(--blue);
        border-color: rgba(74, 144, 217, 0.25);
      }
      .method-kind.instance {
        color: var(--green);
        border-color: rgba(61, 170, 106, 0.25);
      }
      .method-body {
        padding: 18px 22px;
      }
      .method-desc {
        font-size: 14px;
        font-weight: 300;
        color: var(--text-mid);
        line-height: 1.72;
        margin-bottom: 18px;
      }
      .method-desc:last-child {
        margin-bottom: 0;
      }

      /* tables */
      .ptable {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 18px;
        font-family: "IBM Plex Mono", monospace;
        font-size: 11.5px;
      }
      .ptable th {
        text-align: left;
        font-size: 9px;
        letter-spacing: 0.2em;
        text-transform: uppercase;
        color: var(--text-dim);
        padding: 7px 10px;
        border-bottom: 1px solid var(--border);
      }
      .ptable td {
        padding: 8px 10px;
        border-bottom: 1px solid rgba(255, 107, 0, 0.04);
        vertical-align: top;
        line-height: 1.5;
      }
      .ptable .pn {
        color: var(--blue);
      }
      .ptable .pt {
        color: var(--text-dim);
        font-size: 10.5px;
      }
      .ptable .pd {
        color: var(--text-mid);
      }
      .ptable .pv {
        color: var(--orange-dim);
        font-size: 10.5px;
      }

      /* code */
      .code-label {
        font-family: "IBM Plex Mono", monospace;
        font-size: 9px;
        letter-spacing: 0.2em;
        text-transform: uppercase;
        color: var(--text-dim);
        margin-bottom: 5px;
        display: block;
      }
      pre {
        background: var(--black-4);
        border: 1px solid var(--border);
        border-left: 2px solid var(--orange-dim);
        padding: 16px 18px;
        font-family: "IBM Plex Mono", monospace;
        font-size: 12px;
        line-height: 1.7;
        overflow-x: auto;
        color: var(--text-mid);
        margin-bottom: 14px;
        white-space: pre;
      }
      pre .cm {
        color: var(--text-dim);
      }
      pre .kw {
        color: var(--purple);
      }
      pre .st {
        color: var(--green);
      }
      pre .fn {
        color: var(--orange);
      }
      pre .nu {
        color: var(--blue);
      }
      pre .cn {
        color: var(--orange-bright);
      }

      /* notes */
      .note {
        padding: 12px 16px;
        border-left: 2px solid;
        font-size: 13px;
        font-weight: 300;
        line-height: 1.65;
        margin: 14px 0;
      }
      .note-info {
        border-color: var(--blue);
        background: rgba(74, 144, 217, 0.05);
        color: #8bb8e8;
      }
      .note-warn {
        border-color: var(--orange);
        background: var(--orange-tint);
        color: var(--orange-bright);
      }
      .note-tip {
        border-color: var(--green);
        background: rgba(61, 170, 106, 0.05);
        color: #7fca9e;
      }
      code {
        font-family: "IBM Plex Mono", monospace;
        font-size: 11.5px;
        background: var(--black-4);
        border: 1px solid var(--border);
        padding: 1px 5px;
        color: var(--orange-bright);
      }

      /* stat cards */
      .stat-row {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 2px;
        margin-bottom: 36px;
      }
      .stat-card {
        background: var(--black-2);
        border: 1px solid var(--border);
        padding: 18px 20px;
      }
      .stat-card-val {
        font-family: "Orbitron", monospace;
        font-size: 22px;
        font-weight: 700;
        color: var(--orange);
        line-height: 1;
        margin-bottom: 5px;
      }
      .stat-card-lbl {
        font-family: "IBM Plex Mono", monospace;
        font-size: 9px;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--text-dim);
      }

      .section-title {
        font-family: "Orbitron", monospace;
        font-size: 15px;
        font-weight: 700;
        letter-spacing: 0.04em;
        color: var(--text);
        margin: 36px 0 18px;
        padding-bottom: 10px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 12px;
      }

      /* ── RESPONSIVE ── */
      @media (max-width: 860px) {
        .menu-toggle {
          display: block;
        }
        .sidebar {
          transform: translateX(-100%);
          width: 280px;
          box-shadow: none;
        }
        .sidebar.open {
          transform: translateX(0);
          box-shadow: 2px 0 20px rgba(0, 0, 0, 0.5);
        }
        .main {
          margin-left: 0;
          padding: 32px 20px 80px;
        }
        .topnav-left .nav-pkg {
          display: none;
        }
        .topnav-right a:not(:first-child) {
          display: none;
        }
        .topnav-right .version-tag {
          display: inline-block;
        }
        .stat-row {
          grid-template-columns: repeat(2, 1fr);
          gap: 8px;
        }
        .method-header {
          flex-direction: column;
        }
        .page-title {
          font-size: 26px;
        }
        .method-sig {
          font-size: 11px;
        }
        pre {
          font-size: 11px;
          padding: 12px;
        }
      }

      @media (max-width: 480px) {
        .main {
          padding: 20px 16px 60px;
        }
        .page-title {
          font-size: 22px;
        }
        .stat-card-val {
          font-size: 18px;
        }
        .ptable th,
        .ptable td {
          padding: 4px 6px;
          font-size: 9px;
        }
      }