:root {
      /* Neon rainbow palette inspired by the logo */
      --bg-main: #050816;
      --bg-alt: #0a0d1f;
      --accent-blue: #0bb4ff;
      --accent-green: #38ff6b;
      --accent-yellow: #ffe640;
      --accent-orange: #ff9b3f;
      --accent-pink: #ff4b8c;
      --accent-purple: #b94dff;

      /* Generic accents (keep for existing code) */
      --accent: #00f5ff;
      --accent-secondary: #ff00ff;
      --accent-soft: rgba(0, 245, 255, 0.25);

      --text-main: #fdfdff;
      --text-muted: #9da5c4;
      --card-bg: #10152b;
      --border-soft: rgba(255, 255, 255, 0.08);
      --danger: #ff4b81;
      --success: #52ffa8;
      --warning: #ffd166;
    }

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

    body {
      font-family: "Poppins", sans-serif;
      background:
        radial-gradient(circle at 0% 0%, rgba(11, 180, 255, 0.18), transparent 55%),
        radial-gradient(circle at 20% 100%, rgba(56, 255, 107, 0.16), transparent 55%),
        radial-gradient(circle at 80% 0%, rgba(255, 228, 64, 0.16), transparent 55%),
        radial-gradient(circle at 100% 100%, rgba(255, 75, 140, 0.18), transparent 55%),
        #050816;
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      display: block;
    }

    /* Layout utility */
    .container {
      width: 90%;
      max-width: 1200px;
      margin: 0 auto;
    }

    /* IMAGE HOLDER (for you to drop images later) */
    .img-holder {
      background: radial-gradient(circle at top, #151a3a 0, #050816 60%);
      border-radius: 1rem;
      border: 1px dashed var(--border-soft);
      min-height: 200px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-size: 0.8rem;
      text-align: center;
      padding: 0.75rem;
    }
    .img-holder img {
      max-width: 100%;
      max-height: 100%;
      border-radius: 1rem;
      object-fit: cover;
    }

    /* Header / Nav */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      backdrop-filter: blur(16px);
      background: linear-gradient(
        to right,
        rgba(5, 8, 22, 0.92),
        rgba(5, 8, 22, 0.85)
      );
      border-bottom: 1px solid var(--border-soft);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    header.scrolled {
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
      background: rgba(5, 8, 22, 0.98);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.85rem 0;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .logo-icon {
      width: 60px;
      height: auto;
    }

    /* keep if you reuse the square mark elsewhere */
    .logo-mark {
      width: 44px;
      height: 44px;
      border-radius: 16px;
      background: conic-gradient(
        from 220deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple),
        var(--accent-blue)
      );
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 22px rgba(255, 255, 255, 0.45);
      font-weight: 700;
      font-size: 1.1rem;
      color: #050816;
    }

    .logo-text span {
      display: block;
    }

    .logo-title {
      font-weight: 700;
      letter-spacing: 0.06em;
      font-size: 1rem;
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .logo-subtitle {
      font-size: 0.7rem;
      color: var(--text-muted);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.5rem;
      font-size: 0.9rem;
    }

    .nav-links a {
      position: relative;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.25s ease;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -0.25rem;
      width: 0;
      height: 2px;
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      transition: width 0.25s ease;
    }

    .nav-links a:hover {
      color: var(--text-main);
    }

    .nav-links a.ni-active {
      color: var(--text-main);
    }

    .nav-links a.ni-active::after {
        width:100%;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .btn-custom {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      border-radius: 999px;
      padding: 0.6rem 1.4rem;
      font-size: 0.85rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      border: 1px solid transparent;
      cursor: pointer;
      transition: background 0.25s ease, transform 0.15s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }

    .btn-primary-custom {
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      color: #050816;
      box-shadow: 0 0 24px rgba(255, 255, 255, 0.65);
      border: none;
    }

    .btn-primary-custom:hover {
      transform: translateY(-1px) scale(1.02);
      box-shadow: 0 0 32px rgba(255, 255, 255, 0.85);
    }

    .btn-outline-custom {
      background: transparent;
      border-color: var(--accent-soft);
      color: var(--text-muted);
    }

    .btn-outline-custom:hover {
      border-image: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      ) 1;
      color: var(--accent);
      box-shadow: 0 0 18px rgba(255, 255, 255, 0.25);
    }

    .btn-sm-custom {
      padding: 0.45rem 1rem;
      font-size: 0.75rem;
    }

    .nav-toggle {
      display: none;
      font-size: 1.3rem;
      cursor: pointer;
    }

    /* Hero section */
    main {
      margin-top: 72px; /* header height offset */
    }

    .hero {
      position: relative;
      padding: 4.5rem 0 4rem;
      overflow: hidden;
    }

    /* HERO BACKGROUND BANNER HOLDER */
    .hero-bg-img {
      position: absolute;
      inset: 0;
      background-position: center;
      background-size: cover;
      background-repeat: no-repeat;
      opacity: 0.25;
      z-index: -2;
      /* background-image: url('images/codenplay-hero-banner.jpg'); */
    }

    .hero-bg-overlay {
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 10% 10%, rgba(11, 180, 255, 0.28), transparent 55%),
        radial-gradient(circle at 80% 15%, rgba(56, 255, 107, 0.25), transparent 60%),
        radial-gradient(circle at 20% 90%, rgba(255, 228, 64, 0.22), transparent 55%),
        radial-gradient(circle at 90% 85%, rgba(255, 75, 140, 0.25), transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(185, 77, 255, 0.19), transparent 65%);
      z-index: -1;
    }

    .hero-inner {
      display: grid;
      gap: 3.5rem;
      align-items: center;
    }

    @media (min-width: 900px) {
      .hero-inner {
        grid-template-columns: 1.1fr 1fr;
      }
    }

    .hero-label {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.2rem 0.55rem;
      border-radius: 999px;
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 0.15em;
      background: rgba(0, 245, 255, 0.08);
      border: 1px solid var(--accent-soft);
      margin-bottom: 0.9rem;
      color: var(--accent);
    }

    .hero-label i {
      font-size: 0.7rem;
    }

    .hero-title {
      font-size: clamp(2.2rem, 3.1vw + 1.5rem, 3.4rem);
      line-height: 1.1;
      margin-bottom: 0.6rem;
    }

    .hero-title span {
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero-subtitle {
      color: var(--text-muted);
      max-width: 530px;
      font-size: 0.98rem;
      margin-bottom: 1.4rem;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
      margin-bottom: 1.5rem;
    }

    .tag {
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      padding: 0.25rem 0.65rem;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-soft);
      color: var(--text-muted);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
      align-items: center;
      margin-bottom: 1.5rem;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 1.5rem;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .hero-meta span strong {
      color: var(--accent);
    }

    .hero-visual {
      position: relative;
      min-height: 260px;
    }

    .hero-glow {
      position: absolute;
      inset: 10% 5%;
      background: radial-gradient(circle at 20% 0, rgba(0, 245, 255, 0.4), transparent 55%),
                  radial-gradient(circle at 80% 100%, rgba(255, 0, 255, 0.4), transparent 60%);
      filter: blur(16px);
      opacity: 0.8;
    }

    .hero-card {
      position: relative;
      z-index: 2;
      padding: 1rem;
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        linear-gradient(145deg, rgba(12, 16, 36, 0.98), rgba(16, 20, 48, 0.98));
      border-radius: 1.4rem;
      border: 1px solid var(--border-soft);
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.65);
      max-width: 420px;
      margin: 0 auto;
    }

    .hero-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.9rem;
    }

    .hero-card-title {
      font-size: 0.88rem;
      font-weight: 600;
    }

    .hero-card-pill {
      font-size: 0.7rem;
      padding: 0.15rem 0.55rem;
      border-radius: 999px;
      background: rgba(0, 245, 255, 0.1);
      border: 1px solid var(--accent-soft);
      color: var(--accent);
    }

    .hero-terminal {
      background: #050816;
      border-radius: 1rem;
      padding: 0.85rem;
      border: 1px solid var(--border-soft);
      font-family: "Fira Code", monospace;
      font-size: 0.7rem;
      position: relative;
      overflow: hidden;
    }

    .hero-terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 0.5rem;
      color: var(--text-muted);
    }

    .hero-dots {
      display: flex;
      gap: 0.25rem;
    }

    .hero-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: #ff5f57;
    }

    .hero-dot:nth-child(2) {
      background: #febc2e;
    }

    .hero-dot:nth-child(3) {
      background: #28c840;
    }

    .hero-code {
      white-space: pre-wrap;
      color: #e2f3ff;
    }

    .hero-code .comment {
      color: #56698f;
    }

    .hero-code .keyword {
      color: #ff6ff2;
    }

    .hero-code .func {
      color: #00f5ff;
    }

    .hero-code .string {
      color: #ffd166;
    }

    .hero-code .number {
      color: #52ffa8;
    }

    .hero-progress {
      margin-top: 0.8rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .progress-bar {
      flex: 1;
      height: 6px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.06);
      overflow: hidden;
      margin: 0 0.8rem;
      position: relative;
    }

    .progress-fill {
      width: 75%;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      box-shadow: 0 0 12px rgba(255, 255, 255, 0.7);
    }

    .hero-floating-card {
      position: absolute;
      padding: 0.7rem 0.9rem;
      border-radius: 1rem;
      background: rgba(5, 8, 22, 0.95);
      border: 1px solid var(--accent-soft);
      color: var(--text-muted);
      font-size: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.55rem;
      backdrop-filter: blur(10px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
    }

    .hero-floating-card i {
      font-size: 1.1rem;
      color: var(--accent);
    }

    .hero-floating-card strong {
      color: var(--accent);
    }

    @media (max-width: 768px) {
      .hero-floating-card {
        display: none;
      }
    }

    /* Sections */
    section {
      padding: 3.2rem 0;
    }

    section:nth-of-type(even) {
      background: radial-gradient(circle at top left, #101630 0, #050816 45%);
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 2.2rem;
    }

    .section-kicker {
      text-transform: uppercase;
      letter-spacing: 0.2em;
      font-size: 0.7rem;
      color: var(--accent);
      margin-bottom: 0.3rem;
    }

    .section-title {
      font-size: 1.7rem;
      margin-bottom: 0.4rem;
    }

    .section-subtitle {
      color: var(--text-muted);
      font-size: 0.95rem;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Features: Learn / Play / Customize */
    .features-grid {
      display: grid;
      gap: 1.5rem;
    }

    @media (min-width: 900px) {
      .features-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    .feature-card {
      position: relative;
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        var(--card-bg);
      border-radius: 1.3rem;
      padding: 1.3rem 1.3rem 1.1rem;
      border: 1px solid var(--border-soft);
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.55);
      overflow: hidden;
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      inset: -50%;
      opacity: 0;
      background: radial-gradient(circle at top, rgba(0, 245, 255, 0.2), transparent 55%);
      transition: opacity 0.3s ease;
      pointer-events: none;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 35px rgba(0, 0, 0, 0.7);
      border-color: var(--accent-soft);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-icon {
      width: 40px;
      height: 40px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      margin-bottom: 0.8rem;
    }

    .feature-icon.learn {
      background: rgba(82, 255, 168, 0.15);
      color: var(--success);
    }

    .feature-icon.play {
      background: rgba(255, 209, 102, 0.15);
      color: var(--warning);
    }

    .feature-icon.custom {
      background: rgba(255, 75, 129, 0.15);
      color: var(--danger);
    }

    .feature-title {
      font-size: 1.05rem;
      margin-bottom: 0.4rem;
    }

    .feature-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 0.7rem;
    }

    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.3rem;
      font-size: 0.7rem;
    }

    .feature-tags span {
      padding: 0.15rem 0.45rem;
      border-radius: 999px;
      border: 1px solid var(--border-soft);
      color: var(--text-muted);
    }

    /* Learn Tracks timeline */
    .tracks {
      display: grid;
      gap: 1.7rem;
    }

    @media (min-width: 900px) {
      .tracks {
        grid-template-columns: 1.3fr 1fr;
      }
    }

    .tracks-list {
      border-left: 2px solid rgba(255, 255, 255, 0.05);
      padding-left: 1.4rem;
    }

    .track-item {
      position: relative;
      margin-bottom: 1.2rem;
    }

    .track-item:last-child {
      margin-bottom: 0;
    }

    .track-bullet {
      position: absolute;
      left: -1.5rem;
      top: 0.25rem;
      width: 14px;
      height: 14px;
      border-radius: 999px;
      background: var(--bg-main);
      border: 2px solid var(--accent);
      box-shadow: 0 0 10px rgba(0, 245, 255, 0.8);
    }

    .track-title {
      font-size: 0.95rem;
      margin-bottom: 0.1rem;
    }

    .track-level {
      font-size: 0.75rem;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.12em;
      margin-bottom: 0.1rem;
    }

    .track-body {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .tracks-sidebar {
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        var(--card-bg);
      border-radius: 1.2rem;
      padding: 1.1rem 1.2rem;
      border: 1px solid var(--border-soft);
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.55);
      font-size: 0.88rem;
    }

    .tracks-sidebar h3 {
      font-size: 1rem;
      margin-bottom: 0.4rem;
    }

    .tracks-stat-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 0.4rem;
      color: var(--text-muted);
    }

    .tracks-stat-row strong {
      color: var(--accent);
    }

    .pill-row {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
      margin-top: 0.3rem;
    }

    .pill {
      font-size: 0.7rem;
      padding: 0.15rem 0.5rem;
      border-radius: 999px;
      border: 1px solid var(--border-soft);
      color: var(--text-muted);
    }

    /* Play & Earn section */
    .play-earn {
      display: grid;
      gap: 1.7rem;
      align-items: center;
    }

    @media (min-width: 900px) {
      .play-earn {
        grid-template-columns: 1fr 1.1fr;
      }
    }

    .kbd-card {
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        var(--card-bg);
      border-radius: 1.3rem;
      padding: 1.3rem 1.4rem;
      border: 1px solid var(--border-soft);
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.6);
      max-width: 420px;
    }

    .kbd-heading {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 0.7rem;
    }

    .kbd-heading span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .kbd-balance {
      font-size: 1.5rem;
      font-weight: 600;
    }

    .kbd-balance sup {
      font-size: 0.7rem;
      padding: 0.2rem 0.4rem;
      border-radius: 999px;
      background: rgba(0, 245, 255, 0.15);
      color: var(--accent);
      margin-left: 0.25rem;
    }

    .kbd-progress-row {
      display: flex;
      justify-content: space-between;
      margin-top: 0.4rem;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .kbd-badges {
      display: flex;
      gap: 0.5rem;
      flex-wrap: wrap;
      margin-top: 0.6rem;
    }

    .kbd-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      padding: 0.18rem 0.6rem;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-soft);
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .kbd-badge i {
      font-size: 0.8rem;
    }

    .kbd-note {
      margin-top: 0.7rem;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* App teaser */
    .app-teaser {
      display: grid;
      gap: 1.7rem;
      align-items: center;
    }

    @media (min-width: 900px) {
      .app-teaser {
        grid-template-columns: 1.1fr 1fr;
      }
    }

    .phone-mock {
      position: relative;
      max-width: 260px;
      margin: 0 auto;
      border-radius: 1.9rem;
      padding: 0.6rem;
      background: linear-gradient(150deg, var(--accent-secondary), var(--accent));
      box-shadow: 0 16px 38px rgba(0, 0, 0, 0.7);
    }

    .phone-inner {
      border-radius: 1.4rem;
      overflow: hidden;
      background: radial-gradient(circle at top, #181f4b 0, #050816 60%);
      padding: 1rem 0.65rem 0.9rem;
      border: 2px solid rgba(255, 255, 255, 0.12);
      position: relative;
    }

    .phone-notch {
      width: 40%;
      height: 10px;
      border-radius: 0 0 999px 999px;
      background: #050816;
      margin: 0 auto 0.6rem;
    }

    .phone-game-card {
      background: rgba(5, 8, 22, 0.94);
      border-radius: 1rem;
      padding: 0.7rem 0.7rem 0.6rem;
      border: 1px solid var(--border-soft);
      color: var(--text-muted);
      font-size: 0.8rem;
    }

    .phone-game-header {
      display: flex;
      justify-content: space-between;
      margin-bottom: 0.4rem;
    }

    .phone-level-pill {
      font-size: 0.7rem;
      padding: 0.12rem 0.45rem;
      border-radius: 999px;
      background: rgba(0, 245, 255, 0.1);
      color: var(--accent);
    }

    .phone-game-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-top: 0.5rem;
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .phone-cta {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      padding: 0.25rem 0.6rem;
      border-radius: 999px;
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      font-size: 0.7rem;
      color: #050816;
      font-weight: 600;
    }

    .phone-dots {
      display: flex;
      gap: 3px;
      margin-top: 0.4rem;
      justify-content: center;
    }

    .phone-dots span {
      width: 6px;
      height: 6px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.2);
    }

    .phone-dots span.active {
      background: var(--accent);
      box-shadow: 0 0 6px rgba(0, 245, 255, 0.8);
    }

    /* Stats / counters */
    .stats-row {
      display: grid;
      gap: 1.1rem;
      margin-top: 1.4rem;
    }

    @media (min-width: 600px) {
      .stats-row {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    .stat-card {
      text-align: center;
      background: rgba(5, 8, 22, 0.95);
      border-radius: 1.1rem;
      padding: 0.8rem 0.6rem 0.7rem;
      border: 1px solid var(--border-soft);
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .stat-number {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 0.1rem;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      gap: 1.6rem;
    }

    @media (min-width: 900px) {
      .faq-grid {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
      }
    }

    .faq-list {
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        var(--card-bg);
      border-radius: 1.3rem;
      border: 1px solid var(--border-soft);
      padding: 1.1rem 1.2rem;
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.55);
    }

    .faq-item {
      border-bottom: 1px solid var(--border-soft);
      padding: 0.7rem 0;
    }

    .faq-item:last-child {
      border-bottom: 0;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 0.9rem;
    }

    .faq-question span {
      flex: 1;
      margin-right: 0.6rem;
    }

    .faq-toggle {
      width: 24px;
      height: 24px;
      border-radius: 999px;
      border: 1px solid var(--border-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      color: var(--accent);
    }

    .faq-answer {
      display: none;
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 0.4rem;
    }

    .faq-answer.open {
      display: block;
    }

    .faq-note {
      margin-top: 0.7rem;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .social-card {
      background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.06), transparent 55%),
        rgba(5, 8, 22, 0.96);
      border-radius: 1.3rem;
      border: 1px solid var(--border-soft);
      padding: 1.1rem 1.2rem;
      box-shadow: 0 12px 26px rgba(0, 0, 0, 0.55);
      font-size: 0.88rem;
    }

    .social-row {
      display: flex;
      gap: 0.6rem;
      margin-top: 0.6rem;
      flex-wrap: wrap;
    }

    .social-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.45rem 0.9rem;
      border-radius: 999px;
      border: 1px solid var(--border-soft);
      background: rgba(12, 16, 36, 0.98);
      font-size: 0.78rem;
      color: var(--text-muted);
      cursor: pointer;
      transition: border-color 0.2s ease, transform 0.1s ease;
    }

    .social-btn i {
      font-size: 0.9rem;
    }

    .social-btn:hover {
      border-color: var(--accent);
      transform: translateY(-1px);
    }

    /* Contact / CTA section */
    .cta-card {
      background: linear-gradient(135deg, rgba(0, 245, 255, 0.16), rgba(255, 0, 255, 0.1));
      border-radius: 1.5rem;
      padding: 1.4rem 1.4rem 1.2rem;
      border: 1px solid var(--accent-soft);
      display: grid;
      gap: 1rem;
      align-items: center;
    }

    @media (min-width: 900px) {
      .cta-card {
        grid-template-columns: 1.4fr 1fr;
      }
    }

    .cta-title {
      font-size: 1.3rem;
      margin-bottom: 0.2rem;
    }

    .cta-subtitle {
      color: var(--text-muted);
      font-size: 0.9rem;
      max-width: 480px;
    }

    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
    }

    .cta-form-row {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
    }

    .input-field {
      flex: 1;
      min-width: 130px;
      background: rgba(5, 8, 22, 0.95);
      border: 1px solid var(--border-soft);
      border-radius: 999px;
      padding: 0.55rem 0.85rem;
      font-size: 0.8rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .input-field::placeholder {
      color: rgba(157, 165, 196, 0.7);
    }

    .input-field:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 1px rgba(0, 245, 255, 0.4);
    }

    .cta-hint {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* Footer */
    footer {
      padding: 1.4rem 0 1.7rem;
      border-top: 1px solid var(--border-soft);
      background: #050816;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .footer-inner {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
      justify-content: space-between;
      align-items: center;
    }

    .footer-links {
      display: flex;
      gap: 0.9rem;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: var(--text-muted);
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    /* Back to top button */
    #btn-back-to-top {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 150;
      display: none;
    }

    /* Auth modal custom styling */
    .auth-modal .modal-content {
      background: #050816;
      border-radius: 1.2rem;
      border: 1px solid var(--border-soft);
      color: var(--text-main);
      box-shadow: 0 20px 40px rgba(0,0,0,0.7);
    }

    .auth-tabs .nav-link {
      border-radius: 999px;
      font-size: 0.82rem;
      text-transform: uppercase;
      letter-spacing: 0.09em;
      padding: 0.4rem 0.9rem;
      color: var(--text-muted);
      border: 1px solid transparent;
    }

    .auth-tabs .nav-link.active {
      background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-green),
        var(--accent-yellow),
        var(--accent-orange),
        var(--accent-pink),
        var(--accent-purple)
      );
      color: #050816;
      border-color: transparent;
    }

    .auth-label {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 0.25rem;
    }

    .auth-input {
      background: #050816;
      border-radius: 999px;
      border: 1px solid var(--border-soft);
      color: var(--text-main);
      font-size: 0.85rem;
      padding: 0.45rem 0.85rem;
    }

    .auth-input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 1px rgba(0, 245, 255, 0.4);
      outline: none;
    }

    .auth-input::placeholder {
      color: rgba(157, 165, 196, 0.7);
    }

    .password-wrapper {
      position: relative;
    }

    .toggle-password {
      position: absolute;
      top: 50%;
      right: 0.75rem;
      transform: translateY(-50%);
      cursor: pointer;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .form-check-label {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .invalid-feedback {
      font-size: 0.75rem;
    }

    /* Toast */
    .toast-container {
      z-index: 2000;
    }

    /* Responsive tweaks */
    @media (max-width: 768px) {
      .nav-links,
      .nav-cta {
        display: none;
      }

      .nav-toggle {
        display: block;
      }

      .nav-mobile {
        display: none;
        flex-direction: column;
        gap: 0.7rem;
        padding: 0.8rem 0;
        font-size: 0.85rem;
      }

      .nav-mobile a {
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 0.08em;
      }

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

      .hero {
        padding-top: 3.1rem;
      }

      .hero-card {
        max-width: 350px;
      }

      .section-title {
        font-size: 1.5rem;
      }
    }
    
    /* ========== Flappy Bird Clone: KBD Flyer ========== */
    #flappy-game {
      padding: 3.5rem 0;
    }

    .flappy-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
      gap: 2rem;
      align-items: flex-start;
    }

    .flappy-info ul {
      padding-left: 1.1rem;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .flappy-card {
      background: rgba(5, 8, 22, 0.95);
      border-radius: 1.2rem;
      padding: 1rem 1.1rem 1.1rem;
      border: 1px solid rgba(148, 163, 184, 0.35);
      box-shadow: 0 18px 32px rgba(0, 0, 0, 0.8);
      font-size: 0.88rem;
    }

    .flappy-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.6rem;
    }

    .flappy-title {
      font-weight: 600;
      color: var(--text-main, #e5e7eb);
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }

    .flappy-title i {
      color: var(--accent, #38bdf8);
    }

    .flappy-meta {
      font-size: 0.75rem;
      color: var(--text-muted, #9ca3af);
    }

    .flappy-stats {
      display: flex;
      gap: 1rem;
    }

    .flappy-stat {
      text-align: right;
      font-size: 0.75rem;
    }

    .flappy-stat .label {
      display: block;
      color: var(--text-muted, #9ca3af);
    }

    .flappy-stat .value {
      font-size: 1.2rem;
      font-weight: 600;
    }

    .flappy-canvas-wrap {
      position: relative;
      width: 100%;
      max-width: 360px;
      margin: 0.4rem auto 0;
      border-radius: 1rem;
      overflow: hidden;
      border: 1px solid rgba(148, 163, 184, 0.4);
      box-shadow: 0 16px 28px rgba(0, 0, 0, 0.75);
      background: linear-gradient(180deg, #0b1220, #020617);
    }

    #flappy-canvas {
      width: 100%;
      height: auto;
      display: block;
      background: linear-gradient(180deg, #0f172a, #020617);
    }

    .flappy-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      pointer-events: none;
    }

    .flappy-overlay-inner {
      text-align: center;
      padding: 0.5rem 0.75rem;
      border-radius: 999px;
      background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.5));
      border: 1px solid rgba(148, 163, 184, 0.4);
      max-width: 85%;
    }

    .flappy-overlay-main {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main, #e5e7eb);
    }

    .flappy-overlay-sub {
      font-size: 0.78rem;
      color: var(--text-muted, #9ca3af);
    }

    .flappy-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.6rem;
      margin-top: 0.75rem;
    }

    .flappy-hint {
      font-size: 0.78rem;
      color: var(--text-muted, #9ca3af);
    }

    /* Small screens */
    @media (max-width: 768px) {
      .flappy-layout {
        grid-template-columns: 1fr;
      }

      .flappy-card {
        order: -1;
      }
    }