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

      :root {
        --bg: #04080f;
        --bg2: #070c16;
        --cyan: #00cfff;
        --cyan-dim: rgba(0, 207, 255, 0.12);
        --cyan-faint: rgba(0, 207, 255, 0.04);
        --blue: #1a8fff;
        --gold: #f5c842;
        --text: #c8daea;
        --text-dim: rgba(180, 210, 230, 0.5);
        --grid: rgba(0, 150, 255, 0.05);
      }

      html {
        scroll-behavior: smooth;
      }
      body {
        background: var(--bg);
        color: var(--text);
        font-family: "Share Tech Mono", monospace;
        overflow-x: hidden;
        cursor: none;
      }

      /* ── CURSOR ── */
      #cursor {
        position: fixed;
        width: 6px;
        height: 6px;
        background: var(--cyan);
        border-radius: 50%;
        pointer-events: none;
        z-index: 9999;
        transform: translate(-50%, -50%);
        box-shadow: 0 0 8px var(--cyan);
      }
      #cursor-ring {
        position: fixed;
        width: 22px;
        height: 22px;
        border: 1px solid rgba(0, 207, 255, 0.5);
        border-radius: 50%;
        pointer-events: none;
        z-index: 9998;
        transform: translate(-50%, -50%);
        transition: all 0.1s ease;
      }

      /* ── BG LAYERS ── */
      .grid-bg {
        position: fixed;
        inset: 0;
        z-index: 0;
        pointer-events: none;
        background-image:
          linear-gradient(var(--grid) 1px, transparent 1px),
          linear-gradient(90deg, var(--grid) 1px, transparent 1px),
          linear-gradient(rgba(0, 120, 255, 0.02) 1px, transparent 1px),
          linear-gradient(90deg, rgba(0, 120, 255, 0.02) 1px, transparent 1px);
        background-size:
          80px 80px,
          80px 80px,
          16px 16px,
          16px 16px;
      }
      .scanlines {
        position: fixed;
        inset: 0;
        z-index: 1;
        pointer-events: none;
        background: repeating-linear-gradient(
          0deg,
          transparent,
          transparent 2px,
          rgba(0, 0, 0, 0.04) 2px,
          rgba(0, 0, 0, 0.04) 4px
        );
      }
      .vignette {
        position: fixed;
        inset: 0;
        z-index: 2;
        pointer-events: none;
        background: radial-gradient(
          ellipse at center,
          transparent 30%,
          rgba(0, 2, 10, 0.85) 100%
        );
      }

      /* ── NAV ── */
      nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 50px;
        height: 64px;
        background: rgba(4, 8, 15, 0.93);
        border-bottom: 1px solid rgba(0, 207, 255, 0.1);
        backdrop-filter: blur(16px);
      }
      .nav-logo {
        font-family: "Bebas Neue", sans-serif;
        font-size: 1.5rem;
        letter-spacing: 5px;
        color: var(--cyan);
        text-shadow: 0 0 20px rgba(0, 207, 255, 0.5);
        text-decoration: none;
      }
      .nav-back {
        font-size: 0.62rem;
        letter-spacing: 3px;
        color: var(--text-dim);
        text-decoration: none;
        border: 1px solid rgba(0, 207, 255, 0.18);
        padding: 7px 18px;
        transition: all 0.25s;
      }
      .nav-back:hover {
        color: var(--cyan);
        border-color: var(--cyan);
        background: var(--cyan-faint);
      }

      /* ── CORNER MARKS ── */
      .corner {
        position: fixed;
        width: 28px;
        height: 28px;
        z-index: 500;
        pointer-events: none;
        opacity: 0.4;
      }
      .corner::before,
      .corner::after {
        content: "";
        position: absolute;
        background: var(--cyan);
      }
      .corner::before {
        width: 100%;
        height: 1px;
        top: 50%;
      }
      .corner::after {
        height: 100%;
        width: 1px;
        left: 50%;
      }
      .corner.tl {
        top: 10px;
        left: 10px;
      }
      .corner.tr {
        top: 10px;
        right: 10px;
      }
      .corner.bl {
        bottom: 10px;
        left: 10px;
      }
      .corner.br {
        bottom: 10px;
        right: 10px;
      }

      section {
        position: relative;
        z-index: 10;
      }
      .divider {
        border: none;
        border-top: 1px solid rgba(0, 207, 255, 0.07);
        position: relative;
        z-index: 10;
      }

      /* ── HERO ── */
      #hero {
        min-height: 100vh;
        padding-top: 64px;
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        overflow: hidden;
      }

      /* full-bleed PCB image as hero background */
      .hero-bg-img {
        position: absolute;
        inset: 0;
        z-index: 0;
      }
      .hero-bg-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center 40%;
        filter: brightness(0.22) saturate(1.4);
      }
      .hero-bg-img::after {
        content: "";
        position: absolute;
        inset: 0;
        background:
          linear-gradient(
            to bottom,
            rgba(4, 8, 15, 0.5) 0%,
            transparent 30%,
            transparent 60%,
            rgba(4, 8, 15, 0.95) 100%
          ),
          linear-gradient(
            to right,
            rgba(4, 8, 15, 0.3) 0%,
            transparent 20%,
            transparent 80%,
            rgba(4, 8, 15, 0.3) 100%
          );
      }

      .hero-content {
        position: relative;
        z-index: 2;
        padding: 0 40px;
      }

      .hero-badge {
        display: inline-block;
        border: 1px solid rgba(0, 207, 255, 0.35);
        padding: 5px 16px;
        font-size: 0.58rem;
        letter-spacing: 5px;
        color: var(--cyan);
        margin-bottom: 24px;
        background: rgba(0, 207, 255, 0.05);
        opacity: 0;
        animation: fadeUp 0.8s ease 0.2s forwards;
      }
      .hero-eyebrow {
        font-size: 0.62rem;
        letter-spacing: 5px;
        color: var(--text-dim);
        margin-bottom: 20px;
        opacity: 0;
        animation: fadeUp 0.8s ease 0.35s forwards;
      }
      .hero-title {
        font-family: "Bebas Neue", sans-serif;
        font-size: clamp(4rem, 10vw, 9.5rem);
        line-height: 0.9;
        letter-spacing: 4px;
        color: #fff;
        text-shadow:
          0 0 80px rgba(0, 150, 255, 0.4),
          0 0 30px rgba(0, 207, 255, 0.2);
        opacity: 0;
        animation: heroReveal 1.3s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
        margin-bottom: 20px;
      }
      .hero-title .t-5g {
        color: var(--cyan);
      }
      .hero-subtitle {
        font-family: "Exo 2", sans-serif;
        font-size: clamp(0.9rem, 2vw, 1.3rem);
        font-weight: 300;
        letter-spacing: 3px;
        color: var(--text-dim);
        margin-bottom: 40px;
        opacity: 0;
        animation: fadeUp 0.8s ease 0.8s forwards;
      }

      .hero-stats {
        display: flex;
        gap: 60px;
        justify-content: center;
        margin-top: 50px;
        opacity: 0;
        animation: fadeUp 0.8s ease 1s forwards;
      }
      .h-stat-num {
        font-family: "Bebas Neue", sans-serif;
        font-size: 2.8rem;
        letter-spacing: 2px;
        color: var(--cyan);
        text-shadow: 0 0 20px rgba(0, 207, 255, 0.4);
        line-height: 1;
      }
      .h-stat-label {
        font-size: 0.52rem;
        letter-spacing: 3px;
        color: var(--text-dim);
        margin-top: 5px;
      }

      .hero-scroll {
        position: absolute;
        bottom: 36px;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        font-size: 0.52rem;
        letter-spacing: 4px;
        color: rgba(0, 207, 255, 0.3);
        animation:
          float 2.5s ease-in-out infinite,
          fadeUp 1s ease 1.5s both;
      }
      .hero-scroll::after {
        content: "";
        width: 1px;
        height: 46px;
        background: linear-gradient(
          to bottom,
          rgba(0, 207, 255, 0.4),
          transparent
        );
      }

      @keyframes heroReveal {
        from {
          opacity: 0;
          transform: translateY(50px) scale(0.96);
          filter: blur(8px);
        }
        to {
          opacity: 1;
          transform: translateY(0) scale(1);
          filter: blur(0);
        }
      }
      @keyframes fadeUp {
        from {
          opacity: 0;
          transform: translateY(18px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }
      @keyframes float {
        0%,
        100% {
          transform: translateX(-50%) translateY(0);
        }
        50% {
          transform: translateX(-50%) translateY(8px);
        }
      }

      /* ── WHY 5G ── */
      #why {
        padding: 120px 80px;
        background: rgba(0, 100, 255, 0.015);
      }
      .why-inner {
        max-width: 1200px;
        margin: 0 auto;
      }

      .section-label {
        font-size: 0.58rem;
        letter-spacing: 5px;
        color: rgba(0, 207, 255, 0.4);
        margin-bottom: 12px;
      }
      .section-title {
        font-family: "Bebas Neue", sans-serif;
        font-size: clamp(2rem, 5vw, 4rem);
        letter-spacing: 4px;
        color: #fff;
        margin-bottom: 16px;
        line-height: 1;
      }
      .section-title span {
        color: var(--cyan);
      }
      .section-intro {
        font-family: "Exo 2", sans-serif;
        font-size: 0.88rem;
        font-weight: 300;
        color: var(--text-dim);
        letter-spacing: 1px;
        line-height: 1.8;
        margin-bottom: 70px;
        max-width: 600px;
      }

      .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 2px;
      }
      @media (max-width: 900px) {
        .features-grid {
          grid-template-columns: 1fr 1fr;
        }
      }
      @media (max-width: 500px) {
        .features-grid {
          grid-template-columns: 1fr;
        }
      }

      .feat-card {
        padding: 40px 36px;
        border: 1px solid rgba(0, 207, 255, 0.08);
        background: rgba(0, 207, 255, 0.02);
        position: relative;
        overflow: hidden;
        transition: all 0.4s;
      }
      .feat-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 2px;
        background: linear-gradient(
          90deg,
          transparent,
          var(--cyan),
          transparent
        );
        transform: scaleX(0);
        transition: transform 0.4s;
      }
      .feat-card:hover {
        background: rgba(0, 207, 255, 0.05);
        border-color: rgba(0, 207, 255, 0.2);
      }
      .feat-card:hover::before {
        transform: scaleX(1);
      }

      .feat-icon {
        font-size: 2rem;
        margin-bottom: 20px;
        display: block;
        line-height: 1;
        filter: drop-shadow(0 0 12px rgba(0, 207, 255, 0.4));
      }
      .feat-name {
        font-family: "Bebas Neue", sans-serif;
        font-size: 1.2rem;
        letter-spacing: 3px;
        color: var(--cyan);
        margin-bottom: 10px;
      }
      .feat-desc {
        font-family: "Exo 2", sans-serif;
        font-size: 0.78rem;
        font-weight: 300;
        color: var(--text-dim);
        line-height: 1.7;
      }

      /* ── PCB SHOWCASE ── */
      #board {
        padding: 0;
        position: relative;
        overflow: hidden;
      }
      .board-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        min-height: 600px;
      }
      @media (max-width: 800px) {
        .board-grid {
          grid-template-columns: 1fr;
        }
      }

      .board-img {
        position: relative;
        overflow: hidden;
        background: #000;
      }
      .board-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: brightness(0.85) saturate(1.2);
        transition: transform 0.8s ease;
      }
      .board-img:hover img {
        transform: scale(1.04);
      }
      /* cyan tint overlay */
      .board-img::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          135deg,
          rgba(0, 80, 255, 0.08) 0%,
          transparent 60%
        );
        pointer-events: none;
      }

      .board-text {
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: 70px 70px;
        background: rgba(0, 50, 120, 0.06);
        border-left: 1px solid rgba(0, 207, 255, 0.08);
      }
      .board-label {
        font-size: 0.58rem;
        letter-spacing: 5px;
        color: rgba(0, 207, 255, 0.4);
        margin-bottom: 14px;
      }
      .board-title {
        font-family: "Bebas Neue", sans-serif;
        font-size: clamp(2rem, 4vw, 3.5rem);
        letter-spacing: 4px;
        color: #fff;
        margin-bottom: 6px;
        line-height: 1;
      }
      .board-title span {
        color: var(--cyan);
      }
      .board-version {
        font-size: 0.6rem;
        letter-spacing: 4px;
        color: var(--gold);
        margin-bottom: 30px;
      }
      .board-body {
        font-family: "Exo 2", sans-serif;
        font-size: 0.88rem;
        font-weight: 300;
        line-height: 1.9;
        color: var(--text-dim);
      }

      /* ── SPECS ── */
      #specs {
        padding: 120px 80px;
        border-top: 1px solid rgba(0, 207, 255, 0.07);
        border-bottom: 1px solid rgba(0, 207, 255, 0.07);
        background: rgba(0, 207, 255, 0.015);
      }
      .specs-inner {
        max-width: 1200px;
        margin: 0 auto;
      }

      .specs-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
        margin-top: 60px;
        border: 1px solid rgba(0, 207, 255, 0.08);
      }
      @media (max-width: 800px) {
        .specs-grid {
          grid-template-columns: 1fr;
        }
      }

      .spec-row {
        display: grid;
        grid-template-columns: 1fr 2fr;
        border-bottom: 1px solid rgba(0, 207, 255, 0.06);
        transition: background 0.3s;
      }
      .spec-row:hover {
        background: rgba(0, 207, 255, 0.04);
      }
      .spec-key {
        padding: 20px 24px;
        font-size: 0.65rem;
        letter-spacing: 2px;
        color: var(--cyan);
        border-right: 1px solid rgba(0, 207, 255, 0.06);
        display: flex;
        align-items: center;
      }
      .spec-val {
        padding: 20px 24px;
        font-family: "Exo 2", sans-serif;
        font-size: 0.82rem;
        font-weight: 300;
        color: var(--text-dim);
        line-height: 1.6;
        display: flex;
        align-items: center;
      }

      .specs-note {
        margin-top: 40px;
        padding: 24px 30px;
        border: 1px solid rgba(245, 200, 66, 0.2);
        background: rgba(245, 200, 66, 0.03);
        font-family: "Exo 2", sans-serif;
        font-size: 0.82rem;
        font-weight: 300;
        color: rgba(245, 200, 66, 0.7);
        letter-spacing: 1px;
      }
      .specs-note strong {
        color: var(--gold);
      }

      /* ── VIDEO SECTION ── */
      #videos {
        padding: 120px 80px;
      }
      .vid-inner {
        max-width: 1200px;
        margin: 0 auto;
      }
      .vid-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin-top: 60px;
      }
      @media (max-width: 800px) {
        .vid-grid {
          grid-template-columns: 1fr;
        }
      }

      .vid-card {
        position: relative;
        border: 1px solid rgba(0, 207, 255, 0.1);
        overflow: hidden;
        background: #000;
      }
      .vid-placeholder {
        aspect-ratio: 16/9;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 12px;
        background: rgba(0, 207, 255, 0.02);
        border: 1px dashed rgba(0, 207, 255, 0.15);
      }
      .vid-play {
        font-size: 2rem;
        color: rgba(0, 207, 255, 0.25);
      }
      .vid-label {
        font-size: 0.6rem;
        letter-spacing: 3px;
        color: rgba(0, 207, 255, 0.3);
      }

      .vid-card video {
        width: 100%;
        aspect-ratio: 16/9;
        display: block;
        object-fit: cover;
      }
      .vid-info {
        padding: 20px 24px;
        border-top: 1px solid rgba(0, 207, 255, 0.08);
      }
      .vid-title {
        font-size: 0.68rem;
        letter-spacing: 3px;
        color: var(--cyan);
        margin-bottom: 6px;
      }
      .vid-desc {
        font-family: "Exo 2", sans-serif;
        font-size: 0.78rem;
        font-weight: 300;
        color: var(--text-dim);
        line-height: 1.6;
      }

      /* ── TESTING GALLERY ── */
      #testing {
        padding: 120px 80px;
      }
      .test-inner {
        max-width: 1200px;
        margin: 0 auto;
      }
      .test-intro {
        font-family: "Exo 2", sans-serif;
        font-size: 0.88rem;
        font-weight: 300;
        color: var(--text-dim);
        margin-bottom: 60px;
        line-height: 1.8;
        letter-spacing: 1px;
      }

      .test-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 3px;
      }
      @media (max-width: 800px) {
        .test-grid {
          grid-template-columns: 1fr;
        }
      }

      .test-card {
        position: relative;
        overflow: hidden;
        cursor: none;
      }
      .test-card img {
        width: 100%;
        aspect-ratio: 4/3;
        object-fit: cover;
        filter: brightness(0.7) saturate(0.9);
        transition: all 0.5s ease;
        display: block;
      }
      .test-card:hover img {
        filter: brightness(0.9) saturate(1.2);
        transform: scale(1.04);
      }
      .test-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(
          to top,
          rgba(0, 0, 0, 0.85) 0%,
          transparent 50%
        );
        pointer-events: none;
      }
      .test-label {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 24px 20px;
      }
      .test-num {
        font-size: 0.5rem;
        letter-spacing: 4px;
        color: var(--cyan);
        display: block;
        margin-bottom: 6px;
      }
      .test-name {
        font-family: "Bebas Neue", sans-serif;
        font-size: 1.1rem;
        letter-spacing: 3px;
        color: #fff;
      }
      .test-detail {
        font-family: "Exo 2", sans-serif;
        font-size: 1rem;
        font-weight: 300;
        color: rgba(255, 255, 255, 0.45);
        margin-top: 4px;
        line-height: 1.4;
      }

      /* corner accent on test cards */
      .test-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 20px;
        height: 20px;
        z-index: 2;
        border-top: 1px solid rgba(0, 207, 255, 0.4);
        border-left: 1px solid rgba(0, 207, 255, 0.4);
        transition: all 0.3s;
      }
      .test-card:hover::before {
        width: 28px;
        height: 28px;
        border-color: var(--cyan);
      }

      /* ── CONTACT FORM ── */
      #contact {
        padding: 120px 80px;
        background: rgba(0, 207, 255, 0.02);
        border-top: 1px solid rgba(0, 207, 255, 0.08);
      }
      .contact-inner {
        max-width: 780px;
        margin: 0 auto;
      }
      .contact-cta {
        font-family: "Bebas Neue", sans-serif;
        font-size: clamp(1.5rem, 3vw, 2.5rem);
        letter-spacing: 4px;
        color: #fff;
        margin-bottom: 10px;
        line-height: 1.1;
      }
      .contact-cta span {
        color: var(--cyan);
      }
      .contact-sub {
        font-family: "Exo 2", sans-serif;
        font-size: 0.82rem;
        font-weight: 300;
        color: var(--text-dim);
        margin-bottom: 50px;
        letter-spacing: 1px;
        line-height: 1.7;
      }

      .form-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 14px;
        margin-bottom: 14px;
      }
      @media (max-width: 600px) {
        .form-grid {
          grid-template-columns: 1fr;
        }
      }

      .form-group {
        display: flex;
        flex-direction: column;
        gap: 6px;
      }
      .form-group.full {
        grid-column: 1/-1;
      }
      .form-group label {
        font-size: 0.58rem;
        letter-spacing: 3px;
        color: rgba(0, 207, 255, 0.45);
        text-transform: uppercase;
      }
      .form-group input,
      .form-group textarea,
      .form-group select {
        background: rgba(0, 207, 255, 0.04);
        border: 1px solid rgba(0, 207, 255, 0.15);
        color: var(--text);
        font-family: "Share Tech Mono", monospace;
        font-size: 0.8rem;
        padding: 12px 16px;
        outline: none;
        transition: all 0.25s;
        resize: none;
        appearance: none;
      }
      .form-group input:focus,
      .form-group textarea:focus {
        border-color: rgba(0, 207, 255, 0.45);
        background: rgba(0, 207, 255, 0.07);
      }
      .form-group textarea {
        min-height: 110px;
      }
      .form-required {
        color: var(--cyan);
      }

      .btn-submit {
        margin-top: 6px;
        padding: 13px 36px;
        background: var(--cyan);
        color: var(--bg);
        font-family: "Share Tech Mono", monospace;
        font-size: 0.68rem;
        letter-spacing: 3px;
        border: none;
        cursor: none;
        transition: all 0.3s;
        display: inline-block;
      }
      .btn-submit:hover {
        background: #00e8ff;
        box-shadow: 0 0 30px rgba(0, 207, 255, 0.4);
      }

      /* ── REVEAL ── */
      .reveal {
        opacity: 0;
        transform: translateY(28px);
        transition:
          opacity 0.7s ease,
          transform 0.7s ease;
      }
      .reveal.visible {
        opacity: 1;
        transform: translateY(0);
      }

      /* ── FOOTER ── */
      footer {
        position: relative;
        z-index: 10;
        border-top: 1px solid rgba(0, 207, 255, 0.07);
        padding: 26px 80px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 0.58rem;
        letter-spacing: 2px;
        color: rgba(0, 207, 255, 0.2);
      }