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

    :root {
      --color-bg-primary: #094058;
      --color-bg-secondary: #0a4d6a;
      --color-bg-tertiary: #0d5a7a;
      --color-text-primary: #fff;
      --color-text-secondary: #85a0ad;
      --color-text-muted: #6b8a9a;
      --color-accent: #31aab0;
      --color-accent-secondary: #73bb44;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      background-color: var(--color-bg-primary);
      color: var(--color-text-primary);
      line-height: 1.8;
      font-size: 16px;
    }

    .accent-ribbon {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
      z-index: 50;
    }

    header {
      position: fixed;
      top: 4px;
      left: 0;
      right: 0;
      background-color: rgba(9, 64, 88, 0.95);
      border-bottom: 1px solid var(--color-bg-tertiary);
      z-index: 50;
      backdrop-filter: blur(10px);
    }

    nav {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 1rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 5rem;
    }

    .logo-section {
      display: flex;
      align-items: center;
      gap: 1rem;
      text-decoration: none;
      color: inherit;
    }

    .logo-svg {
      width: 2.5rem;
      height: 2.5rem;
      flex-shrink: 0;
      color: var(--color-accent);
    }

    .slogan {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      font-style: italic;
    }

    nav a {
      color: var(--color-text-primary);
      text-decoration: none;
      padding: 0.5rem 1rem;
      border-radius: 0.5rem;
      transition: all 0.3s ease;
    }

    nav a:hover {
      background-color: rgba(49, 170, 176, 0.1);
      color: var(--color-accent);
    }

    .nav-right {
      display: flex;
      gap: 0.65rem;
      align-items: center;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .top-nav-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 2.05rem;
      min-width: 7rem;
      padding: 0.5rem 1rem;
      border-radius: 0.8rem;
      border: 1px solid var(--color-bg-tertiary);
      background: rgba(255, 255, 255, 0.02);
      white-space: nowrap;
      text-decoration: none;
    }

    .top-nav-btn:hover {
      border-color: var(--color-accent);
      color: var(--color-accent);
      background: rgba(49, 170, 176, 0.1);
    }

    main {
      margin-top: 5.5rem;
      padding: 1.5rem 1rem;
    }

    .container {
      max-width: 900px;
      margin: 0 auto;
    }

    h1 {
      font-size: 2.5rem;
      color: var(--color-accent);
      margin-bottom: 2rem;
      text-align: center;
    }

    h2 {
      font-size: 1.5rem;
      color: var(--color-accent);
      margin-top: 1.35rem;
      margin-bottom: 0.75rem;
    }

    p {
      margin-bottom: 1rem;
      color: var(--color-text-secondary);
    }

    strong {
      color: var(--color-text-primary);
    }

    .contact-box {
      background-color: var(--color-bg-secondary);
      border: 1px solid var(--color-bg-tertiary);
      border-radius: 0.75rem;
      padding: 1.5rem;
      margin: 2rem 0;
    }

    .lang-selector {
      position: relative;
      display: inline-block;
    }

    .lang-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      min-height: 2.5rem;
      padding: 0.28rem 0.55rem;
      background: linear-gradient(135deg, rgba(49, 170, 176, 0.18), rgba(115, 187, 68, 0.12));
      color: var(--color-text-primary);
      border: 1px solid rgba(49, 170, 176, 0.45);
      border-radius: 0.7rem;
      cursor: pointer;
      box-shadow: 0 10px 24px rgba(7, 39, 54, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(8px);
      font-weight: 600;
      letter-spacing: 0.01em;
      font-size: 0.9rem;
      line-height: 1;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
      position: relative;
      overflow: hidden;
    }

    .lang-btn::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, transparent 18%, rgba(255, 255, 255, 0.2) 48%, transparent 78%);
      transform: translateX(-130%);
      animation: langBtnSweep 3.8s ease-in-out infinite;
      pointer-events: none;
    }

    button.lang-btn::after {
      content: '▾';
      font-size: 0.56rem;
      opacity: 0.85;
      transform: translateY(1px);
      transition: transform 0.25s ease, opacity 0.25s ease;
      position: relative;
      z-index: 1;
    }

    .lang-selector.is-open button.lang-btn::after {
      transform: rotate(180deg) translateY(-1px);
      opacity: 1;
    }

    .lang-btn:hover {
      border-color: rgba(115, 187, 68, 0.78);
      color: #ffffff;
      background: linear-gradient(135deg, rgba(49, 170, 176, 0.26), rgba(115, 187, 68, 0.2));
      box-shadow: 0 14px 28px rgba(7, 39, 54, 0.4), 0 0 0 1px rgba(115, 187, 68, 0.22);
      transform: translateY(-1px);
    }

    .lang-btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(49, 170, 176, 0.32), 0 14px 28px rgba(7, 39, 54, 0.4);
    }

    .lang-menu {
      position: absolute;
      top: calc(100% + 0.45rem);
      right: 0;
      background: linear-gradient(180deg, rgba(10, 77, 106, 0.98), rgba(8, 61, 84, 0.98));
      border: 1px solid rgba(125, 178, 194, 0.34);
      border-radius: 0.9rem;
      min-width: 3.8rem;
      box-shadow: 0 18px 38px rgba(4, 25, 35, 0.44);
      z-index: 100;
      overflow: hidden;
      backdrop-filter: blur(10px);
      padding: 0.35rem;
      opacity: 0;
      transform: translateY(-8px) scale(0.985);
      pointer-events: none;
      transition: opacity 0.22s ease, transform 0.22s ease;
    }

    .lang-selector.is-open .lang-menu {
      opacity: 1;
      transform: translateY(0) scale(1);
      pointer-events: auto;
    }

    .lang-menu.hidden {
      display: none;
    }

    .lang-menu a {
      display: block;
      padding: 0.7rem 0.8rem;
      color: var(--color-text-primary);
      text-decoration: none;
      border-radius: 0.6rem;
      transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
      font-weight: 500;
    }

    .lang-menu a:hover {
      background: rgba(49, 170, 176, 0.16);
      color: #ffffff;
      transform: translateX(2px);
    }

    @keyframes langBtnSweep {
      0%, 42% {
        transform: translateX(-130%);
      }
      58%, 100% {
        transform: translateX(130%);
      }
    }

    footer {
      background-color: var(--color-bg-secondary);
      border-top: 1px solid var(--color-bg-tertiary);
      padding: 2rem 1rem;
      margin-top: 4rem;
      color: var(--color-text-secondary);
      text-align: center;
    }

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

    footer a:hover {
      text-decoration: underline;
    }

    @media (max-width: 768px) {
      nav {
        height: auto;
        min-height: 4rem;
        padding: 0.5rem 0.75rem;
        align-items: flex-start;
        gap: 0.5rem;
        flex-wrap: wrap;
      }

      .logo-section {
        width: 100%;
      }

      .logo-section img {
        height: 2.5rem !important;
      }

      .nav-right {
        width: 100%;
        gap: 0.4rem;
        justify-content: flex-start;
      }

      .top-nav-btn {
        min-width: auto;
        min-height: 2rem;
        padding: 0.35rem 0.6rem;
        font-size: 0.82rem;
      }

      .lang-btn {
        min-height: 2rem;
        padding: 0.25rem 0.48rem;
      }

      .lang-menu {
        right: auto;
        left: 0;
      }

      main {
        margin-top: 8rem;
        padding: 1rem 0.75rem;
      }

      .contact-box {
        padding: 1rem;
      }

      h1 {
        font-size: 1.8rem;
      }

      h2 {
        font-size: 1.2rem;
      }
    }

    @media (max-width: 480px) {
      header {
        position: sticky;
        top: 4px;
      }

      nav {
        padding: 0.45rem 0.55rem;
        gap: 0.4rem;
      }

      .nav-right {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
        gap: 0.35rem;
      }

      .top-nav-btn {
        min-width: 0;
        width: 100%;
        font-size: 0.74rem;
        padding: 0.32rem 0.4rem;
        white-space: normal;
        line-height: 1.1;
        text-align: center;
      }

      .lang-selector {
        width: 100%;
      }

      .lang-selector .lang-btn {
        width: 100%;
        justify-content: center;
      }

      .lang-menu {
        left: 0;
        right: auto;
        min-width: 3.4rem;
      }

      main {
        margin-top: 1rem;
        padding: 0.85rem 0.6rem 1.2rem;
      }

      .hero-kicker {
        font-size: 0.66rem;
        letter-spacing: 0.06em;
        padding: 0.32rem 0.55rem;
      }

      .hero-title {
        font-size: clamp(1.55rem, 9.5vw, 2.05rem);
        line-height: 1.02;
      }

      .section-label {
        font-size: 0.62rem;
        letter-spacing: 0.12em;
      }

      .section-title {
        font-size: 1.35rem;
      }

      .card,
      .form-panel,
      .contact-box {
        padding: 0.95rem;
      }

      footer {
        padding: 1.4rem 0.75rem;
      }
    }

    /* modern-ui-enhancements */
    :root {
      --kv-glow-cyan: rgba(49, 170, 176, 0.24);
      --kv-brand-deep: #094058;
      --kv-brand-cyan: #31aab0;
      --kv-brand-lime: #73bb44;
      --kv-glow-lime: rgba(115, 187, 68, 0.22);
      --kv-glass-border: rgba(255, 255, 255, 0.14);
    }

    body {
      font-family: "Funnel Display", "Inter", "Avenir Next", "Segoe UI", sans-serif;
      background-image:
        radial-gradient(circle at 12% 8%, var(--kv-glow-cyan), transparent 42%),
        radial-gradient(circle at 88% 88%, var(--kv-glow-lime), transparent 46%),
        linear-gradient(145deg, rgba(8, 49, 68, 0.98) 0%, rgba(10, 77, 106, 0.95) 45%, rgba(8, 61, 84, 0.98) 100%);
      background-attachment: fixed;
      background-size: 145% 145%, 130% 130%, 100% 100%;
      animation: kvBackgroundDrift 20s ease-in-out infinite alternate;
    }

    header {
      box-shadow: 0 12px 30px rgba(4, 28, 39, 0.32);
    }

    .card,
    .container {
      box-shadow: 0 16px 42px rgba(0, 0, 0, 0.18);
      border: 1px solid var(--kv-glass-border);
    }

    .card:hover {
      transform: translateY(-6px) scale(1.01);
    }

    .logo-section img {
      filter: drop-shadow(0 8px 22px rgba(0, 0, 0, 0.34));
      transition: transform 0.3s ease, filter 0.3s ease;
    }

    .logo-section:hover img {
      transform: translateY(-2px);
      filter: drop-shadow(0 10px 26px rgba(0, 0, 0, 0.42));
    }

    .reveal-init {
      opacity: 0;
      transform: translateY(26px) scale(0.985);
      transition: opacity 0.7s ease, transform 0.7s ease;
      will-change: opacity, transform;
    }

    .reveal-init.reveal-on {
      opacity: 1;
      transform: translateY(0) scale(1);
    }

    @keyframes kvBackgroundDrift {
      0% { background-position: 0% 0%, 100% 100%, 50% 50%; }
      100% { background-position: 12% 8%, 86% 92%, 50% 50%; }
    }

    @media (prefers-reduced-motion: reduce) {
      body {
        animation: none;
      }

      .card,
      .logo-section img,
      .reveal-init {
        transition: none;
      }

      .reveal-init {
        opacity: 1;
        transform: none;
      }
    }