/* ====================== BASE ====================== */
:root {
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --radius: 12px;
    --shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
  }
  
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body {
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; cursor: pointer; }
  ul, ol { list-style: none; }
  
  .container { width: min(1180px, 100% - 40px); margin-inline: auto; }
  .container--narrow { width: min(820px, 100% - 40px); }
  
  /* ====================== HEADER ====================== */
  .header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
  }
  .header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
  .header__right { display: flex; align-items: center; gap: 1rem; }
  
  .logo { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
  .logo span { color: var(--primary); }
  .logo--light { color: #fff; }
  .logo--light span { color: #93c5fd; }
  
  .nav { display: flex; align-items: center; gap: 1.8rem; }
  .nav a { font-size: 0.95rem; font-weight: 500; color: #475569; transition: color 0.2s; }
  .nav a:hover { color: var(--primary); }
  .nav__cta {
    background: var(--primary); color: #fff !important;
    padding: 0.55rem 1.1rem; border-radius: 8px;
  }
  .nav__cta:hover { background: var(--primary-dark); }
  
  .lang-switch { display: flex; align-items: center; gap: 0.35rem; font-size: 0.85rem; font-weight: 600; color: #cbd5e1; }
  .lang-btn { background: none; border: none; color: #94a3b8; padding: 0.25rem 0.4rem; border-radius: 4px; font-weight: 600; }
  .lang-btn.active { color: var(--primary); background: #eff6ff; }
  
  .burger { display: none; background: none; border: none; width: 32px; height: 32px; position: relative; }
  .burger span {
    position: absolute; left: 6px; right: 6px; height: 2px; background: var(--text);
    transition: transform 0.25s, opacity 0.25s;
  }
  .burger span:nth-child(1) { top: 10px; }
  .burger span:nth-child(2) { top: 15px; }
  .burger span:nth-child(3) { top: 20px; }
  .burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
  
  /* ====================== BUTTONS ====================== */
  .btn {
    display: inline-block; padding: 0.85rem 1.7rem; border-radius: 10px;
    font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    text-align: center;
  }
  .btn--primary { background: var(--primary); color: #fff; }
  .btn--primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
  .btn--ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
  .btn--ghost:hover { border-color: var(--primary); color: var(--primary); }
  .btn--block { width: 100%; }
  .btn--sm { padding: 0.5rem 1rem; font-size: 0.85rem; }
  
  /* ====================== HERO ====================== */
  .hero {
    padding: 5rem 0 4rem;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  }
  .hero__inner {
    display: grid; grid-template-columns: 1.1fr 1fr; gap: 3.5rem; align-items: center;
  }
  .badge {
    display: inline-block; padding: 0.35rem 0.8rem; border-radius: 99px;
    background: #fff; border: 1px solid var(--border);
    font-size: 0.8rem; font-weight: 600; color: var(--primary);
    margin-bottom: 1.2rem;
  }
  .hero h1 {
    font-size: clamp(2.2rem, 4.5vw, 3.2rem); font-weight: 800;
    line-height: 1.15; letter-spacing: -0.03em; margin-bottom: 1.2rem;
  }
  .hero__subtitle { font-size: 1.15rem; color: #475569; margin-bottom: 2rem; max-width: 520px; }
  .hero__actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 2rem; }
  .hero__bullets { display: flex; flex-wrap: wrap; gap: 1.2rem; font-size: 0.85rem; color: var(--muted); }
  .hero__bullets li::before { content: "✓"; color: #16a34a; margin-right: 0.4rem; font-weight: 700; }
  
  .hero__image img {
    border-radius: 20px; box-shadow: var(--shadow);
    aspect-ratio: 4/3; object-fit: cover;
  }
  
  /* ====================== STATS ====================== */
  .stats { background: var(--bg-dark); color: #fff; padding: 3rem 0; }
  .stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
  .stat__num { display: block; font-size: 2.5rem; font-weight: 800; letter-spacing: -0.02em; color: #93c5fd; }
  .stat__label { font-size: 0.9rem; color: #cbd5e1; }
  
  /* ====================== SECTIONS ====================== */
  .section { padding: 5rem 0; }
  .section--alt { background: var(--bg-alt); }
  .section--dark { background: var(--bg-dark); color: #fff; }
  .section__head { max-width: 720px; margin-bottom: 3rem; }
  .eyebrow {
    display: inline-block; font-size: 0.8rem; font-weight: 700; color: var(--primary);
    text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.6rem;
  }
  .eyebrow--light { color: #93c5fd; }
  .section__title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 0.6rem; }
  .section__subtitle { font-size: 1.05rem; color: var(--muted); max-width: 640px; }
  .section--dark .section__subtitle { color: #cbd5e1; }
  
  /* ====================== GRIDS ====================== */
  .grid { display: grid; gap: 1.5rem; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
  
  /* ====================== SERVICES ====================== */
  .card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1.8rem; transition: box-shadow 0.25s, transform 0.25s;
  }
  .card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
  .card__icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 48px; height: 48px; border-radius: 10px;
    background: #eff6ff; color: var(--primary); margin-bottom: 1rem;
  }
  .card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
  .card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1rem; }
  .card__list { font-size: 0.88rem; color: #475569; }
  .card__list li { padding: 0.25rem 0 0.25rem 1.1rem; position: relative; }
  .card__list li::before { content: "•"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
  
  /* ====================== TIMELINE ====================== */
  .timeline { display: grid; gap: 1.5rem; max-width: 800px; }
  .timeline__item { display: flex; gap: 1.2rem; }
  .timeline__step {
    flex-shrink: 0; width: 52px; height: 52px; border-radius: 50%;
    background: var(--primary); color: #fff; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
  }
  .timeline__item h3 { font-size: 1.1rem; margin-bottom: 0.25rem; }
  .timeline__item p { color: var(--muted); font-size: 0.95rem; }
  
  /* ====================== LOGOS BAND ====================== */
  .logos {
    display: flex; flex-wrap: wrap; justify-content: space-between;
    align-items: center; gap: 1.5rem 2rem;
    padding: 1.8rem 0; margin-bottom: 3rem;
    border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  }
  .logo-mark {
    font-weight: 800; font-size: 1.05rem; letter-spacing: 0.08em;
    color: #94a3b8; opacity: 0.85;
  }
  
  /* ====================== CASES ====================== */
  .cases { display: grid; gap: 3rem; }
  .case {
    display: grid; grid-template-columns: 1fr 1.1fr; gap: 2.5rem; align-items: center;
    background: #fff; border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
  }
  .case--reverse { grid-template-columns: 1.1fr 1fr; }
  .case--reverse .case__image { order: 2; }
  .case--reverse .case__body { order: 1; padding: 2.2rem 0 2.2rem 2.2rem; }
  .case__image img { aspect-ratio: 3/2; object-fit: cover; height: 100%; }
  .case__body { padding: 2.2rem 2.2rem 2.2rem 0; }
  .case__tag {
    display: inline-block; font-size: 0.8rem; font-weight: 700; color: var(--primary);
    text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.5rem;
  }
  .case h3 { font-size: 1.4rem; margin-bottom: 0.7rem; }
  .case p { color: var(--muted); font-size: 0.95rem; margin-bottom: 1.2rem; }
  .case__results { display: flex; gap: 2rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
  .case__results strong { display: block; font-size: 1.5rem; font-weight: 800; color: var(--primary); }
  .case__results span { font-size: 0.8rem; color: var(--muted); }
  .case__stack { display: flex; flex-wrap: wrap; gap: 0.4rem; }
  .case__stack span {
    font-size: 0.75rem; padding: 0.25rem 0.6rem;
    background: #f1f5f9; border-radius: 99px; color: #475569; font-weight: 500;
  }
  
  .clients-note {
    margin-top: 3rem; font-size: 0.8rem; color: var(--muted); font-style: italic; text-align: center;
  }
  
  /* ====================== TECH ====================== */
  .tech-grid {
    display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center;
  }
  .tech {
    padding: 0.55rem 1.1rem; border-radius: 99px; background: #fff;
    border: 1px solid var(--border); font-size: 0.9rem; font-weight: 500; color: #334155;
    transition: border-color 0.2s, color 0.2s;
  }
  .tech:hover { border-color: var(--primary); color: var(--primary); }
  
  /* ====================== TESTIMONIALS ====================== */
  .testimonial {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1.8rem; display: flex; flex-direction: column; gap: 1.2rem;
  }
  .testimonial blockquote { font-size: 1rem; color: #1e293b; line-height: 1.6; }
  .testimonial blockquote::before { content: "“"; font-size: 2rem; color: var(--primary); line-height: 0; vertical-align: -0.4em; margin-right: 0.15rem; }
  .testimonial figcaption { display: flex; align-items: center; gap: 0.8rem; }
  .testimonial img { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
  .testimonial strong { display: block; font-size: 0.9rem; }
  .testimonial span { font-size: 0.8rem; color: var(--muted); }
  
  /* ====================== TEAM ====================== */
  .member { text-align: center; }
  .member img {
    width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 12px; margin-bottom: 0.8rem;
  }
  .member h3 { font-size: 1.05rem; }
  .member p { font-size: 0.85rem; color: var(--muted); }
  
  /* ====================== FAQ ====================== */
  .faq { display: grid; gap: 0.75rem; }
  .faq details {
    background: #fff; border: 1px solid var(--border); border-radius: 10px;
    padding: 1rem 1.2rem;
  }
  .faq summary {
    font-weight: 600; cursor: pointer; list-style: none; position: relative; padding-right: 2rem;
  }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after {
    content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
    font-size: 1.5rem; color: var(--primary); transition: transform 0.2s;
  }
  .faq details[open] summary::after { content: "−"; }
  .faq p { margin-top: 0.7rem; color: var(--muted); font-size: 0.95rem; }
  
  /* ====================== CONTACT ====================== */
  .contact {
    display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; align-items: start;
  }
  .contact__intro .section__title { color: #fff; }
  .contact__intro p { color: #cbd5e1; margin-bottom: 1.5rem; }
  .contact__list { display: grid; gap: 0.8rem; font-size: 0.95rem; }
  .contact__list strong { display: block; font-size: 0.75rem; color: #93c5fd; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.2rem; font-weight: 700; }
  .contact__list a { color: #fff; border-bottom: 1px solid rgba(255,255,255,0.2); }
  .contact__list a:hover { border-color: #93c5fd; }
  
  .form {
    background: #fff; padding: 2rem; border-radius: 14px;
    display: grid; gap: 1rem;
  }
  .form-row { display: flex; flex-direction: column; gap: 0.35rem; }
  .form-row--half { flex-direction: row; gap: 1rem; }
  .form-row--half > div { flex: 1; display: flex; flex-direction: column; gap: 0.35rem; }
  .form label { font-size: 0.85rem; font-weight: 600; color: #334155; }
  .form input, .form select, .form textarea {
    padding: 0.75rem 1rem; border: 1px solid #cbd5e1; border-radius: 8px;
    font: inherit; font-size: 0.95rem; background: #fff; color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .form input:focus, .form select:focus, .form textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  }
  .form textarea { resize: vertical; min-height: 120px; }
  
  .form-row--check { margin: 0.5rem 0; }
  .checkbox { display: flex; gap: 0.6rem; align-items: flex-start; font-size: 0.85rem; color: #475569; font-weight: 400 !important; cursor: pointer; }
  .checkbox input { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; cursor: pointer; }
  
  .form-status { font-weight: 500; color: #16a34a; min-height: 1.4em; font-size: 0.9rem; }
  .form-status.error { color: #dc2626; }
  
  /* ====================== FOOTER ====================== */
  .footer { background: #0b1220; color: #cbd5e1; padding: 3.5rem 0 1.5rem; }
  .footer__grid {
    display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem;
    padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .footer__about { margin-top: 0.8rem; font-size: 0.9rem; color: #94a3b8; max-width: 320px; }
  .footer h4 { font-size: 0.9rem; color: #fff; margin-bottom: 0.9rem; font-weight: 700; }
  .footer ul { display: grid; gap: 0.55rem; }
  .footer ul a { font-size: 0.9rem; color: #94a3b8; }
  .footer ul a:hover { color: #fff; }
  .footer__bottom {
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
    padding-top: 1.5rem; font-size: 0.8rem; color: #64748b;
  }
  
  /* ====================== COOKIE ====================== */
  .cookie {
    position: fixed; left: 20px; right: 20px; bottom: 20px; z-index: 200;
    background: #0f172a; color: #fff; padding: 1rem 1.2rem;
    border-radius: 12px; display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; box-shadow: 0 12px 40px rgba(0,0,0,0.25);
    max-width: 720px; margin-inline: auto;
  }
  .cookie p { font-size: 0.85rem; }
  
  /* ====================== REVEAL ANIMATION ====================== */
  .reveal {
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.is-visible { opacity: 1; transform: none; }
  
  /* ====================== RESPONSIVE ====================== */
  @media (max-width: 960px) {
    .hero__inner { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero__image img { aspect-ratio: 16/9; }
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .contact { grid-template-columns: 1fr; gap: 2.5rem; }
    .case, .case--reverse { grid-template-columns: 1fr; }
    .case__body, .case--reverse .case__body { padding: 0 1.5rem 1.5rem; }
    .case--reverse .case__image { order: 0; }
    .case--reverse .case__body { order: 1; }
  }
  
  @media (max-width: 760px) {
    .nav {
      display: none; position: absolute; top: 72px; left: 0; right: 0;
      background: #fff; flex-direction: column; align-items: flex-start;
      padding: 1.5rem; gap: 1rem; border-bottom: 1px solid var(--border);
    }
    .nav.is-open { display: flex; }
    .burger { display: block; }
    .grid--3 { grid-template-columns: 1fr; }
    .grid--4 { grid-template-columns: 1fr 1fr; }
    .stats__grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
    .form-row--half { flex-direction: column; }
  }
  
  @media (max-width: 520px) {
    .hero { padding: 3rem 0 2.5rem; }
    .section { padding: 3.5rem 0; }
    .grid--4 { grid-template-columns: 1fr; }
    .stats__grid { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr; }
    .case__results { gap: 1rem; }
    .cookie { flex-direction: column; align-items: stretch; text-align: center; }
  }
  
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1 !important; transform: none !important; transition: none; }
    html { scroll-behavior: auto; }
  }