:root {
        --bg: #0a0e1a;
        --surface: #111827;
        --surface2: #1a2236;
        --accent: #00d4ff;
        --accent2: #7c3aed;
        --accent3: #10b981;
        --warn: #f59e0b;
        --text: #e2e8f0;
        --text-muted: #94a3b8;
        --border: rgba(255, 255, 255, 0.07);
        --code-bg: #0d1117;
      }

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

      html {
        scroll-behavior: smooth;
      }

      body {
        font-family: "Sora", sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.75;
        overflow-x: hidden;
      }

      /* ── HERO ── */
      .hero {
        position: relative;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        padding: 4rem 2rem;
        overflow: hidden;
      }

      .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(
            ellipse 80% 60% at 50% 0%,
            rgba(0, 212, 255, 0.12) 0%,
            transparent 70%
          ),
          radial-gradient(
            ellipse 60% 50% at 80% 80%,
            rgba(124, 58, 237, 0.1) 0%,
            transparent 60%
          );
      }

      .hero-grid {
        position: absolute;
        inset: 0;
        background-image:
          linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
          linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
        background-size: 48px 48px;
      }

      .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        background: rgba(0, 212, 255, 0.1);
        border: 1px solid rgba(0, 212, 255, 0.3);
        border-radius: 999px;
        padding: 0.4rem 1.2rem;
        font-size: 0.78rem;
        font-weight: 600;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--accent);
        margin-bottom: 2rem;
        position: relative;
        animation: fadeDown 0.8s ease both;
      }

      .dot {
        width: 8px;
        height: 8px;
        background: var(--accent);
        border-radius: 50%;
        animation: pulse 2s infinite;
      }

      @keyframes pulse {
        0%,
        100% {
          opacity: 1;
          transform: scale(1);
        }
        50% {
          opacity: 0.5;
          transform: scale(0.8);
        }
      }

      .hero h1 {
        font-size: clamp(2.4rem, 6vw, 5rem);
        font-weight: 800;
        line-height: 1.1;
        letter-spacing: -0.02em;
        position: relative;
        animation: fadeDown 0.9s 0.1s ease both;
      }

      .hero h1 span {
        background: linear-gradient(135deg, var(--accent), var(--accent2));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .hero-sub {
        margin-top: 1.5rem;
        font-size: 1.15rem;
        color: var(--text-muted);
        max-width: 600px;
        position: relative;
        animation: fadeDown 1s 0.2s ease both;
      }

      .hero-meta {
        margin-top: 3rem;
        display: flex;
        gap: 2rem;
        justify-content: center;
        flex-wrap: wrap;
        position: relative;
        animation: fadeDown 1s 0.3s ease both;
      }

      .meta-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
      }

      .meta-label {
        font-size: 0.72rem;
        text-transform: uppercase;
        letter-spacing: 0.1em;
        color: var(--text-muted);
      }

      .meta-value {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--accent);
      }

      @keyframes fadeDown {
        from {
          opacity: 0;
          transform: translateY(-20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      /* ── NAV ── */
      nav {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(10, 14, 26, 0.85);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        padding: 0 2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        height: 56px;
      }

      nav a {
        color: var(--text-muted);
        text-decoration: none;
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        transition: color 0.2s;
      }

      nav a:hover {
        color: var(--accent);
      }

      nav a.nav-github {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        border: 1px solid var(--border);
        color: var(--text-muted);
        transition:
          color 0.2s,
          border-color 0.2s,
          transform 0.2s;
      }

      nav a.nav-github:hover {
        color: var(--accent);
        border-color: rgba(0, 212, 255, 0.4);
        transform: translateY(-1px);
      }

      nav a.nav-github svg {
        width: 16px;
        height: 16px;
        fill: currentColor;
      }

      /* ── LAYOUT ── */
      .container {
        max-width: 860px;
        margin: 0 auto;
        padding: 0 2rem;
      }

      section {
        padding: 5rem 0;
        border-bottom: 1px solid var(--border);
      }

      .section-tag {
        display: inline-block;
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.15em;
        text-transform: uppercase;
        color: var(--accent);
        margin-bottom: 1rem;
      }

      h2 {
        font-size: clamp(1.6rem, 3vw, 2.2rem);
        font-weight: 800;
        letter-spacing: -0.02em;
        margin-bottom: 1.5rem;
        line-height: 1.2;
      }

      h3 {
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 0.75rem;
        color: var(--text);
      }

      p {
        color: var(--text-muted);
        margin-bottom: 1.2rem;
        font-size: 1rem;
      }

      /* ── CARDS ── */
      .card-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
        margin-top: 2rem;
      }

      @media (max-width: 600px) {
        .card-grid {
          grid-template-columns: 1fr;
        }
      }

      /* ── RESPONSIVE ── */
      /* Tablet (≤ 1024px) */
      @media (max-width: 1024px) {
        .container {
          max-width: 100%;
          padding: 0 1.5rem;
        }

        section {
          padding: 4rem 0;
        }

        .hero {
          padding: 3.5rem 1.5rem;
        }

        .hero-meta {
          margin-top: 2.5rem;
          gap: 1.5rem;
        }

        nav {
          justify-content: flex-end;
          overflow: hidden;
          padding: 0 1rem;
          gap: 0;
        }

        .nav-links {
          display: none;
        }

        .nav-hamburger {
          display: flex;
        }
      }

      /* Mobile (≤ 768px) */
      @media (max-width: 768px) {
        html {
          -webkit-text-size-adjust: 100%;
        }

        body {
          line-height: 1.65;
        }

        .container {
          padding: 0 1.25rem;
        }

        section {
          padding: 3.25rem 0;
        }

        /* Hero */
        .hero {
          min-height: auto;
          padding: 3rem 1.25rem 3.5rem;
        }

        .hero-badge {
          font-size: 0.7rem;
          padding: 0.35rem 1rem;
          margin-bottom: 1.5rem;
        }

        .hero-sub {
          font-size: 1rem;
          margin-top: 1.25rem;
          padding: 0 0.25rem;
        }

        .hero-meta {
          margin-top: 2rem;
          gap: 1.25rem 2rem;
        }

        .meta-label {
          font-size: 0.65rem;
        }

        .meta-value {
          font-size: 0.82rem;
        }
        /* Headings */
        h2 {
          margin-bottom: 1.1rem;
        }

        h3 {
          font-size: 1.05rem;
        }

        p {
          font-size: 0.95rem;
        }

        /* Cards */
        .card {
          padding: 1.25rem;
          border-radius: 14px;
        }

        /* Table → stacked card layout */
        .table-wrap {
          border: none;
          border-radius: 0;
          overflow: visible;
        }

        table,
        thead,
        tbody,
        tr,
        td {
          display: block;
          width: 100%;
        }

        thead {
          display: none;
        }

        tr {
          background: var(--surface);
          border: 1px solid var(--border);
          border-radius: 12px;
          margin-bottom: 0.85rem;
          padding: 0.25rem 0;
        }

        tr:hover td {
          background: transparent;
        }

        td {
          border-top: none;
          border-bottom: 1px solid var(--border);
          padding: 0.7rem 1rem;
          font-size: 0.88rem;
        }

        tr td:last-child {
          border-bottom: none;
        }

        td::before {
          content: attr(data-label);
          display: block;
          font-size: 0.65rem;
          font-weight: 700;
          letter-spacing: 0.12em;
          text-transform: uppercase;
          color: var(--accent);
          margin-bottom: 0.25rem;
        }

        /* Code blocks */
        pre {
          padding: 1.1rem 1rem 1.1rem 1rem;
          font-size: 0.78rem;
          line-height: 1.65;
          border-radius: 10px;
        }

        pre::before {
          top: 0.4rem;
          right: 0.7rem;
          font-size: 0.62rem;
        }

        /* Field blocks */
        .field-block {
          padding: 1.25rem 1rem;
          border-radius: 10px;
          margin-bottom: 1.5rem;
        }

        .field-header {
          gap: 0.6rem;
          margin-bottom: 0.85rem;
        }

        .field-num {
          width: 28px;
          height: 28px;
          font-size: 0.72rem;
          border-radius: 7px;
        }

        .field-title {
          font-size: 0.95rem;
        }

        .field-rule {
          font-size: 0.82rem;
        }

        .regex-display {
          font-size: 0.78rem;
          padding: 0.5rem 0.75rem;
          word-break: break-all;
          max-width: 100%;
        }

        .examples {
          gap: 0.5rem;
        }

        .ex {
          font-size: 0.75rem;
          padding: 0.25rem 0.6rem;
        }

        .callout {
          font-size: 0.82rem;
          padding: 0.85rem 1rem;
        }

        /* Escape grid */
        .escape-grid {
          grid-template-columns: 1fr;
          gap: 0.6rem;
        }

        /* References */
        .ref-item {
          padding: 1rem 1rem 1rem 2.75rem;
          font-size: 0.88rem;
        }

        .ref-item::before {
          left: 0.85rem;
          top: 1rem;
        }

        /* Regex proof figure */
        .regex-proof figcaption {
          font-size: 0.68rem;
          padding: 0.55rem 0.85rem;
        }

        /* Back to top */
        .back-to-top {
          width: 42px;
          height: 42px;
          bottom: 1.1rem;
          right: 1.1rem;
        }

        .back-to-top svg {
          width: 18px;
          height: 18px;
        }

        /* Footer */
        footer {
          padding: 2.25rem 1.25rem;
          font-size: 0.78rem;
        }
      }

      /* Small mobile (≤ 480px) */
      @media (max-width: 480px) {
        .container {
          padding: 0 1rem;
        }

        .hero {
          padding: 2.5rem 1rem 3rem;
        }

        .hero-meta {
          flex-direction: column;
          gap: 1rem;
          margin-top: 1.75rem;
        }

        nav {
          gap: 0.9rem;
          padding: 0 0.85rem;
        }

        nav a {
          font-size: 0.72rem;
        }

        .section-tag {
          font-size: 0.68rem;
        }

        pre {
          font-size: 0.72rem;
          padding: 1rem 0.85rem;
        }

        .card-grid {
          gap: 0.9rem;
        }

        .examples {
          gap: 0.4rem;
        }

        .ex {
          font-size: 0.7rem;
        }
      }

      /* Larger touch targets on coarse pointers */
      @media (hover: none) and (pointer: coarse) {
        .card:hover {
          transform: none;
        }

        .ref-item:hover {
          transform: none;
        }

        .back-to-top:hover {
          transform: none;
        }
      }

      .card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 16px;
        padding: 1.5rem;
        transition:
          border-color 0.25s,
          transform 0.25s;
      }

      .card:hover {
        border-color: rgba(0, 212, 255, 0.3);
        transform: translateY(-3px);
      }

      .card-icon {
        font-size: 1.8rem;
        margin-bottom: 0.75rem;
      }

      .card h3 {
        font-size: 0.95rem;
        margin-bottom: 0.4rem;
      }

      .card p {
        font-size: 0.88rem;
        margin: 0;
      }

      /* ── TABLE ── */
      .table-wrap {
        overflow-x: auto;
        margin-top: 2rem;
        border-radius: 12px;
        border: 1px solid var(--border);
      }

      table {
        width: 100%;
        border-collapse: collapse;
        font-size: 0.9rem;
      }

      thead {
        background: var(--surface2);
      }

      th {
        padding: 0.9rem 1.2rem;
        text-align: left;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--accent);
      }

      td {
        padding: 0.85rem 1.2rem;
        border-top: 1px solid var(--border);
        color: var(--text-muted);
        vertical-align: top;
      }

      tr:hover td {
        background: rgba(255, 255, 255, 0.02);
      }

      /* ── CODE ── */
      pre {
        background: var(--code-bg);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 1.4rem 1.6rem;
        overflow-x: auto;
        margin: 1rem 0 1.5rem;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.85rem;
        line-height: 1.7;
        position: relative;
      }

      pre::before {
        content: attr(data-lang);
        position: absolute;
        top: 0.6rem;
        right: 1rem;
        font-size: 0.68rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--accent);
        opacity: 0.6;
      }

      code {
        color: var(--accent);
      }
      pre code {
        color: var(--text);
      }

      .kw {
        color: #c792ea;
      }
      .str {
        color: #c3e88d;
      }
      .cm {
        color: #546e7a;
        font-style: italic;
      }
      .fn {
        color: #82aaff;
      }
      .bool {
        color: var(--accent3);
      }
      .num {
        color: var(--warn);
      }

      /* ── FIELD BLOCKS ── */
      .field-block {
        background: var(--surface);
        border: 1px solid var(--border);
        border-left: 3px solid var(--accent);
        border-radius: 12px;
        padding: 1.75rem;
        margin-bottom: 2rem;
        transition: border-left-color 0.2s;
      }

      .field-block:hover {
        border-left-color: var(--accent2);
      }

      .field-header {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        margin-bottom: 1rem;
      }

      .field-num {
        width: 32px;
        height: 32px;
        background: linear-gradient(135deg, var(--accent), var(--accent2));
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.8rem;
        font-weight: 800;
        color: #fff;
        flex-shrink: 0;
      }

      .field-title {
        font-weight: 700;
        font-size: 1rem;
      }

      .field-rule {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 0.75rem;
      }

      .regex-display {
        background: var(--code-bg);
        border: 1px solid rgba(0, 212, 255, 0.2);
        border-radius: 8px;
        padding: 0.6rem 1rem;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.9rem;
        color: var(--accent);
        margin-bottom: 1rem;
        display: inline-block;
        letter-spacing: 0.05em;
      }

      .examples {
        display: flex;
        gap: 0.75rem;
        flex-wrap: wrap;
        margin-bottom: 1rem;
      }

      .ex {
        display: flex;
        align-items: center;
        gap: 0.4rem;
        font-size: 0.82rem;
        font-family: "JetBrains Mono", monospace;
        padding: 0.3rem 0.75rem;
        border-radius: 6px;
      }

      .ex.valid {
        background: rgba(16, 185, 129, 0.1);
        color: var(--accent3);
        border: 1px solid rgba(16, 185, 129, 0.25);
      }

      .ex.invalid {
        background: rgba(239, 68, 68, 0.08);
        color: #f87171;
        border: 1px solid rgba(239, 68, 68, 0.2);
      }

      /* ── CALLOUT ── */
      .callout {
        background: rgba(245, 158, 11, 0.08);
        border: 1px solid rgba(245, 158, 11, 0.25);
        border-radius: 10px;
        padding: 1rem 1.25rem;
        font-size: 0.88rem;
        color: var(--warn);
        margin: 1rem 0;
      }

      /* ── ESCAPE TABLE ── */
      .escape-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        margin-top: 1.5rem;
      }

      .escape-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 0.75rem 1rem;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.85rem;
      }

      .escape-arrow {
        color: var(--text-muted);
      }

      /* ── FOOTER ── */
      footer {
        text-align: center;
        padding: 3rem 2rem;
        color: var(--text-muted);
        font-size: 0.82rem;
        border-top: 1px solid var(--border);
      }

      footer a {
        color: var(--accent);
        text-decoration: none;
      }

      .footer-github {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.5rem 1rem;
        border: 1px solid var(--border);
        border-radius: 999px;
        font-weight: 600;
        font-size: 0.82rem;
        transition:
          border-color 0.2s,
          color 0.2s,
          transform 0.2s;
      }

      .footer-github:hover {
        border-color: rgba(0, 212, 255, 0.4);
        color: var(--accent);
        transform: translateY(-1px);
      }

      .footer-github svg {
        width: 16px;
        height: 16px;
        fill: currentColor;
      }

      /* ── REFERENCIAS ── */
      .ref-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 2rem;
        counter-reset: ref;
      }

      .ref-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-left: 3px solid var(--accent);
        border-radius: 12px;
        padding: 1.25rem 1.5rem 1.25rem 3.5rem;
        position: relative;
        font-size: 0.92rem;
        color: var(--text-muted);
        line-height: 1.7;
        transition:
          border-left-color 0.2s,
          transform 0.2s;
        counter-increment: ref;
      }

      .ref-item:hover {
        border-left-color: var(--accent2);
        transform: translateX(3px);
      }

      .ref-item::before {
        content: counter(ref, decimal-leading-zero);
        position: absolute;
        left: 1rem;
        top: 1.25rem;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--accent);
        letter-spacing: 0.05em;
      }

      .ref-item cite {
        font-style: italic;
        color: var(--text);
        font-weight: 600;
      }

      .ref-item a {
        color: var(--accent);
        text-decoration: none;
        word-break: break-all;
        border-bottom: 1px dashed rgba(0, 212, 255, 0.35);
        transition:
          color 0.2s,
          border-color 0.2s;
      }

      .ref-item a:hover {
        color: var(--accent2);
        border-bottom-color: var(--accent2);
      }

      /* ── BACK TO TOP ── */
      .back-to-top {
        position: fixed;
        bottom: 1.75rem;
        right: 1.75rem;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--accent), var(--accent2));
        border: 1px solid rgba(0, 212, 255, 0.4);
        color: #fff;
        font-size: 1.2rem;
        font-weight: 800;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow:
          0 8px 24px rgba(0, 212, 255, 0.25),
          0 0 0 1px rgba(255, 255, 255, 0.04) inset;
        opacity: 0;
        visibility: hidden;
        transform: translateY(12px);
        transition:
          opacity 0.3s ease,
          transform 0.3s ease,
          visibility 0.3s,
          box-shadow 0.2s;
        z-index: 200;
      }

      .back-to-top.visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
      }

      .back-to-top:hover {
        box-shadow: 0 10px 32px rgba(124, 58, 237, 0.4);
        transform: translateY(-3px);
      }

      .back-to-top svg {
        width: 20px;
        height: 20px;
        stroke: #fff;
        stroke-width: 2.5;
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      /* ── REGEX101 PROOFS ── */
      .regex-proof {
        margin-top: 1.25rem;
        background: var(--code-bg);
        border: 1px solid var(--border);
        border-radius: 12px;
        overflow: hidden;
        position: relative;
      }

      .regex-proof figcaption {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.65rem 1rem;
        background: var(--surface2);
        border-bottom: 1px solid var(--border);
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--accent);
      }

      .regex-proof figcaption::before {
        content: "";
        width: 8px;
        height: 8px;
        background: var(--accent3);
        border-radius: 50%;
        box-shadow: 0 0 8px var(--accent3);
      }

      .regex-proof img {
        display: block;
        width: 100%;
        height: auto;
        cursor: zoom-in;
        transition: opacity 0.2s;
      }

      .regex-proof img:hover {
        opacity: 0.88;
      }

      /* ── LIGHTBOX ── */
      .lightbox {
        position: fixed;
        inset: 0;
        background: rgba(10, 14, 26, 0.75);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 2rem;
        z-index: 500;
        opacity: 0;
        visibility: hidden;
        transition:
          opacity 0.3s ease,
          visibility 0.3s;
        cursor: zoom-out;
      }

      .lightbox.open {
        opacity: 1;
        visibility: visible;
      }

      .lightbox img {
        max-width: 95vw;
        max-height: 90vh;
        border-radius: 14px;
        border: 1px solid rgba(0, 212, 255, 0.2);
        box-shadow:
          0 30px 80px rgba(0, 0, 0, 0.55),
          0 0 0 1px rgba(255, 255, 255, 0.04) inset;
        transform: scale(0.94);
        transition: transform 0.3s ease;
      }

      .lightbox.open img {
        transform: scale(1);
      }

      .lightbox-close {
        position: absolute;
        top: 1.25rem;
        right: 1.5rem;
        width: 42px;
        height: 42px;
        border-radius: 50%;
        border: 1px solid var(--border);
        background: rgba(17, 24, 39, 0.9);
        color: var(--text);
        font-size: 1.3rem;
        font-weight: 700;
        line-height: 1;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition:
          border-color 0.2s,
          color 0.2s,
          transform 0.2s;
      }

      .lightbox-close:hover {
        border-color: var(--accent);
        color: var(--accent);
        transform: rotate(90deg);
      }

      body.lb-open {
        overflow: hidden;
      }

      /* ── HAMBURGER + SHEET ── */
      .nav-links {
        display: flex;
        align-items: center;
        gap: 2.5rem;
      }

      .nav-hamburger {
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        width: 40px;
        height: 40px;
        background: none;
        border: 1px solid var(--border);
        border-radius: 8px;
        cursor: pointer;
        padding: 0;
        flex-shrink: 0;
        transition: border-color 0.2s;
      }

      .nav-hamburger:hover {
        border-color: rgba(0, 212, 255, 0.4);
      }

      .nav-hamburger span {
        display: block;
        width: 18px;
        height: 2px;
        background: var(--text-muted);
        border-radius: 2px;
        transform-origin: center;
        transition:
          background 0.2s,
          transform 0.3s,
          opacity 0.3s;
      }

      .nav-hamburger.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
        background: var(--accent);
      }

      .nav-hamburger.open span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
      }

      .nav-hamburger.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
        background: var(--accent);
      }

      /* Keep this override after base nav rules so cascade works on localhost */
      @media (max-width: 1024px) {
        body {
          padding-top: 56px;
        }

        nav {
          position: fixed;
          top: 0;
          left: 0;
          right: 0;
          justify-content: flex-end;
          overflow: hidden;
          padding: 0 1rem;
          gap: 0;
        }

        .nav-links {
          display: none;
        }

        .nav-hamburger {
          display: flex;
        }
      }

      .nav-sheet-overlay {
        position: fixed;
        inset: 0;
        background: rgba(10, 14, 26, 0.65);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 150;
        opacity: 0;
        visibility: hidden;
        transition:
          opacity 0.3s ease,
          visibility 0.3s;
      }

      .nav-sheet-overlay.open {
        opacity: 1;
        visibility: visible;
      }

      .nav-sheet {
        position: fixed;
        top: 0;
        right: 0;
        width: min(80vw, 280px);
        height: 100dvh;
        background: var(--surface);
        border-left: 1px solid rgba(255, 255, 255, 0.08);
        z-index: 200;
        display: flex;
        flex-direction: column;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
      }

      .nav-sheet.open {
        transform: translateX(0);
      }

      .nav-sheet-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 1rem 1.1rem;
        border-bottom: 1px solid var(--border);
        background: var(--surface2);
        flex-shrink: 0;
      }

      .nav-sheet-title {
        font-size: 0.7rem;
        font-weight: 700;
        letter-spacing: 0.15em;
        text-transform: uppercase;
        color: var(--accent);
      }

      .nav-sheet-close {
        width: 32px;
        height: 32px;
        border-radius: 7px;
        border: 1px solid var(--border);
        background: none;
        color: var(--text-muted);
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition:
          border-color 0.2s,
          color 0.2s,
          transform 0.2s;
      }

      .nav-sheet-close:hover {
        border-color: var(--accent);
        color: var(--accent);
        transform: rotate(90deg);
      }

      .nav-sheet-links {
        display: flex;
        flex-direction: column;
        padding: 1.25rem 0.85rem;
        gap: 0.15rem;
        flex: 1;
      }

      .nav-sheet-links a {
        color: var(--text-muted);
        text-decoration: none;
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        padding: 0.85rem 1rem;
        border-radius: 10px;
        display: flex;
        align-items: center;
        gap: 0.6rem;
        transition:
          background 0.2s,
          color 0.2s;
      }

      .nav-sheet-links a:hover,
      .nav-sheet-links a:active {
        background: rgba(0, 212, 255, 0.08);
        color: var(--accent);
      }

      .nav-sheet-links .sheet-github {
        margin-top: auto;
        padding-top: 1rem;
        border-top: 1px solid var(--border);
      }

      .nav-sheet-links .sheet-github svg {
        width: 15px;
        height: 15px;
        fill: currentColor;
        flex-shrink: 0;
      }

      body.sheet-open {
        overflow: hidden;
      }

      /* ── SCROLL ANIMATION ── */
      .reveal {
        opacity: 0;
        transform: translateY(28px);
        transition:
          opacity 0.6s ease,
          transform 0.6s ease;
      }
      .reveal.visible {
        opacity: 1;
        transform: translateY(0);
      }