/* =============================================================
   main.css — Premium Design System (Aurora · Bento · Glass)
   Air Conditioning + Boilers · Tashkent service site
   Vanilla CSS only. Cascade layers keep specificity predictable:
   tokens < base < layout < components < utilities
   ============================================================= */

@layer tokens, base, layout, components, utilities;

/* =============================================================
   TOKENS
   ============================================================= */
@layer tokens {
  :root {
    /* ---- Brand blues (trust) ---- */
    --c-primary-050: #eff6ff;
    --c-primary-100: #dbeafe;
    --c-primary-200: #bfdbfe;
    --c-primary-300: #93c5fd;
    --c-primary-400: #60a5fa;
    --c-primary-500: #3b82f6;
    --c-primary-600: #2563eb;
    --c-primary-700: #1d4ed8;
    --c-primary-800: #1e40af;
    --c-primary-900: #1e3a8a;

    /* ---- Aurora accents ---- */
    --c-violet: #8b5cf6;
    --c-cyan: #22d3ee;
    --c-sky: #38bdf8;

    /* ---- Action colors (high-visibility CTAs) ---- */
    --c-action: #16a34a;
    --c-action-600: #15803d;
    --c-action-glow: rgba(22, 163, 74, 0.35);
    --c-accent: #f97316;
    --c-accent-600: #ea580c;
    --c-telegram: #229ed9;
    --c-telegram-600: #1c8dc2;

    /* ---- Neutrals / surfaces ---- */
    --c-bg: #f6f8fc;
    --c-surface: #ffffff;
    --c-surface-muted: #f4f7fb;
    --c-surface-sunken: #eef2f8;
    --c-text: #0b1220;
    --c-text-muted: #475569;
    --c-text-subtle: #64748b;
    --c-border: #e6ebf3;
    --c-border-strong: #d3dbe7;
    --c-white: #ffffff;

    /* ---- Glassmorphism ---- */
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-bg-strong: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-blur: 16px;

    /* ---- Typography ---- */
    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
      "Helvetica Neue", Arial, sans-serif;

    --fs-100: 0.8125rem;
    --fs-200: 0.9375rem;
    --fs-300: 1rem;
    --fs-400: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
    --fs-500: clamp(1.375rem, 1.15rem + 1.1vw, 1.875rem);
    --fs-600: clamp(1.75rem, 1.35rem + 2vw, 2.5rem);
    --fs-700: clamp(2.25rem, 1.55rem + 3.4vw, 3.75rem);

    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;

    --lh-tight: 1.12;
    --lh-snug: 1.4;
    --lh-body: 1.65;

    /* ---- Spacing (8pt) ---- */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-5: 1.5rem;
    --sp-6: 2rem;
    --sp-7: 3rem;
    --sp-8: 4rem;
    --sp-9: 6rem;

    /* ---- Radii ---- */
    --radius-sm: 0.625rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-pill: 999px;

    /* ---- Layered soft shadows (depth, not borders) ---- */
    --shadow-xs: 0 1px 2px rgb(15 23 42 / 0.06);
    --shadow-sm: 0 4px 6px -1px rgb(15 23 42 / 0.08),
      0 2px 4px -2px rgb(15 23 42 / 0.06);
    --shadow-md: 0 12px 20px -6px rgb(15 23 42 / 0.12),
      0 6px 10px -8px rgb(15 23 42 / 0.1);
    --shadow-lg: 0 24px 40px -12px rgb(15 23 42 / 0.18),
      0 12px 20px -12px rgb(15 23 42 / 0.12);
    --shadow-xl: 0 40px 70px -20px rgb(15 23 42 / 0.28),
      0 18px 30px -18px rgb(15 23 42 / 0.16);
    --shadow-primary: 0 18px 34px -12px rgb(37 99 235 / 0.5);
    --shadow-action: 0 18px 34px -12px rgb(22 163 74 / 0.5);
    --shadow-inset-hi: inset 0 1px 0 0 rgb(255 255 255 / 0.6);

    /* ---- Layout ---- */
    --container: 78rem;
    --container-narrow: 48rem;
    --gutter: clamp(1rem, 0.5rem + 2vw, 2rem);
    --measure: 62ch;

    /* ---- Motion ---- */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --dur-fast: 0.16s;
    --dur: 0.28s;
    --dur-slow: 0.5s;

    /* ---- Mobile action-bar height (reserved => zero CLS) ---- */
    --mobile-bar-h: 4.25rem;

    /* ---- Focus ring ---- */
    --ring: 0 0 0 3px rgb(37 99 235 / 0.35);
  }
}

/* =============================================================
   BASE
   ============================================================= */
@layer base {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  * {
    margin: 0;
  }

  html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
  }

  body {
    position: relative;
    font-family: var(--font-sans);
    font-size: var(--fs-300);
    line-height: var(--lh-body);
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    min-height: 100dvh;
    overflow-x: hidden;
  }

  /* ---- Aurora background glows (fixed, behind everything) ---- */
  body::before {
    content: "";
    position: fixed;
    inset: -25vmax;
    z-index: -1;
    pointer-events: none;
    background:
      radial-gradient(38vmax 38vmax at 12% 8%, rgb(59 130 246 / 0.22), transparent 60%),
      radial-gradient(34vmax 34vmax at 88% 14%, rgb(139 92 246 / 0.18), transparent 60%),
      radial-gradient(40vmax 40vmax at 78% 82%, rgb(34 211 238 / 0.16), transparent 62%),
      radial-gradient(36vmax 36vmax at 20% 92%, rgb(56 189 248 / 0.14), transparent 60%);
    filter: blur(28px) saturate(120%);
    animation: aurora-drift 26s var(--ease) infinite alternate;
  }

  @keyframes aurora-drift {
    0% {
      transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
      transform: translate3d(2%, -1.5%, 0) scale(1.06);
    }
    100% {
      transform: translate3d(-2%, 2%, 0) scale(1.03);
    }
  }

  /* Reserve space so the fixed mobile bar never overlaps content. */
  @media (max-width: 47.99em) {
    body {
      padding-bottom: calc(var(--mobile-bar-h) + env(safe-area-inset-bottom, 0px));
    }
  }

  h1, h2, h3, h4, h5, h6 {
    line-height: var(--lh-tight);
    font-weight: var(--fw-bold);
    letter-spacing: -0.02em;
    text-wrap: balance;
    color: var(--c-text);
  }

  p {
    text-wrap: pretty;
  }

  a {
    color: var(--c-primary-600);
    text-decoration: none;
    text-underline-offset: 0.2em;
  }
  a:hover {
    color: var(--c-primary-700);
  }

  ul, ol {
    list-style: none;
    padding: 0;
  }

  img, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }

  button {
    font: inherit;
    cursor: pointer;
    border: 0;
    background: none;
    color: inherit;
  }

  :focus-visible {
    outline: none;
    box-shadow: var(--ring);
    border-radius: var(--radius-sm);
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
    body::before {
      animation: none;
    }
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }
}

/* =============================================================
   LAYOUT
   ============================================================= */
@layer layout {
  .container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  .container--narrow {
    max-width: var(--container-narrow);
  }

  .section {
    position: relative;
    padding-block: clamp(var(--sp-7), 4vw + 1.5rem, var(--sp-9));
  }
  .section--muted {
    background: linear-gradient(
      180deg,
      rgb(255 255 255 / 0) 0%,
      var(--c-surface-muted) 12%,
      var(--c-surface-muted) 88%,
      rgb(255 255 255 / 0) 100%
    );
  }
  .section__header {
    max-width: var(--measure);
    margin-bottom: var(--sp-6);
  }

  .stack > * + * {
    margin-top: var(--sp-4);
  }
}

/* =============================================================
   COMPONENTS
   ============================================================= */
@layer components {

  /* ---------- Skip link ---------- */
  .skip-link {
    position: absolute;
    left: var(--sp-4);
    top: -4rem;
    z-index: 300;
    padding: var(--sp-2) var(--sp-4);
    background: var(--c-primary-600);
    color: var(--c-white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    transition: top var(--dur-fast) var(--ease);
  }
  .skip-link:focus {
    top: var(--sp-4);
    color: var(--c-white);
  }

  /* ---------- Header (Glassmorphism) ---------- */
  .header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
  }
  .header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    min-height: 4.5rem; /* fixed => no header CLS */
  }
  .header__brand {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-3);
    font-size: var(--fs-400);
    font-weight: var(--fw-extrabold);
    letter-spacing: -0.03em;
    color: var(--c-text);
  }
  .header__brand-mark {
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 0.7rem;
    background: linear-gradient(135deg, var(--c-primary-500), var(--c-violet));
    color: var(--c-white);
    font-size: var(--fs-200);
    font-weight: var(--fw-bold);
    box-shadow: var(--shadow-primary), var(--shadow-inset-hi);
  }

  /* ---------- Navigation ---------- */
  /* Mobile-first: nav is a collapsible glass dropdown panel below the header */
  .nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: var(--gutter);
    right: var(--gutter);
    z-index: 90;
    padding: var(--sp-2);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }
  .header.is-nav-open .nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav__list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav__link {
    position: relative;
    display: block;
    padding: var(--sp-3);
    border-radius: var(--radius-md);
    color: var(--c-text-muted);
    font-weight: var(--fw-medium);
    transition: color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
  }
  .nav__link:hover {
    color: var(--c-primary-700);
    background: var(--c-surface-muted);
  }
  .nav__link[aria-current="page"] {
    color: var(--c-primary-700);
    background: var(--c-primary-050);
  }
  /* Animated underline (desktop only, added back in the media query) */
  .nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--c-primary-500), var(--c-violet));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur) var(--ease);
    opacity: 0;
  }

  /* Burger toggle — visible only on mobile */
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-md);
    color: var(--c-text);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-xs), var(--shadow-inset-hi);
  }
  .nav-toggle__box,
  .nav-toggle__box::before,
  .nav-toggle__box::after {
    position: absolute;
    width: 1.25rem;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: transform var(--dur) var(--ease), background-color var(--dur-fast) var(--ease);
  }
  .nav-toggle__box {
    position: relative;
  }
  .nav-toggle__box::before,
  .nav-toggle__box::after {
    content: "";
    left: 0;
  }
  .nav-toggle__box::before {
    top: -6px;
  }
  .nav-toggle__box::after {
    top: 6px;
  }
  /* Morph to an X when open */
  .header.is-nav-open .nav-toggle__box {
    background: transparent;
  }
  .header.is-nav-open .nav-toggle__box::before {
    transform: translateY(6px) rotate(45deg);
  }
  .header.is-nav-open .nav-toggle__box::after {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* Desktop: inline nav, no panel, hide the burger */
  @media (min-width: 48em) {
    .nav {
      position: static;
      padding: 0;
      background: none;
      border: 0;
      box-shadow: none;
      -webkit-backdrop-filter: none;
      backdrop-filter: none;
      opacity: 1;
      visibility: visible;
      transform: none;
    }
    .nav__list {
      flex-direction: row;
      align-items: center;
      gap: var(--sp-6);
    }
    .nav__link {
      display: inline-block;
      padding: var(--sp-2) 0;
      border-radius: 0;
    }
    .nav__link:hover,
    .nav__link[aria-current="page"] {
      background: none;
    }
    .nav__link::after {
      opacity: 1;
    }
    .nav__link:hover::after,
    .nav__link[aria-current="page"]::after {
      transform: scaleX(1);
    }
    .nav-toggle {
      display: none;
    }
  }

  /* ---------- Header actions ---------- */
  .header__actions {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
  }
  .header__phone {
    display: none;
    align-items: center;
    gap: var(--sp-2);
    font-weight: var(--fw-semibold);
    color: var(--c-text);
    white-space: nowrap;
  }
  @media (min-width: 62em) {
    .header__phone {
      display: inline-flex;
    }
  }

  /* ---------- Language switcher (glass pill) ---------- */
  .lang {
    display: inline-flex;
    padding: 0.25rem;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-xs), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
  .lang__btn {
    min-width: 2.75rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-pill);
    font-size: var(--fs-100);
    font-weight: var(--fw-semibold);
    color: var(--c-text-muted);
    transition: color var(--dur-fast) var(--ease),
      background-color var(--dur-fast) var(--ease),
      box-shadow var(--dur-fast) var(--ease),
      transform var(--dur-fast) var(--ease);
  }
  .lang__btn:hover {
    color: var(--c-text);
    transform: translateY(-1px);
  }
  .lang__btn.is-active {
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: var(--c-white);
    box-shadow: var(--shadow-primary);
  }

  /* ---------- Buttons (gradient-shift micro-interactions) ---------- */
  .btn {
    --btn-lift: -3px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 0.85rem 1.6rem;
    border-radius: var(--radius-md);
    font-weight: var(--fw-semibold);
    line-height: 1.2;
    text-align: center;
    white-space: nowrap;
    border: 1px solid transparent;
    background-size: 200% 200%;
    background-position: 0% 50%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--dur) var(--ease-spring),
      background-position var(--dur-slow) var(--ease),
      box-shadow var(--dur) var(--ease),
      border-color var(--dur-fast) var(--ease),
      color var(--dur-fast) var(--ease);
  }
  .btn:hover {
    transform: translateY(var(--btn-lift)) scale(1.02);
    background-position: 100% 50%;
  }
  .btn:active {
    transform: translateY(0) scale(0.99);
  }

  .btn--action {
    background-image: linear-gradient(
      120deg,
      var(--c-action) 0%,
      #22c55e 50%,
      var(--c-action-600) 100%
    );
    color: var(--c-white);
    box-shadow: var(--shadow-action);
  }
  .btn--action:hover {
    color: var(--c-white);
  }

  .btn--primary {
    background-image: linear-gradient(
      120deg,
      var(--c-primary-600) 0%,
      var(--c-violet) 55%,
      var(--c-primary-700) 100%
    );
    color: var(--c-white);
    box-shadow: var(--shadow-primary);
  }
  .btn--primary:hover {
    color: var(--c-white);
  }

  .btn--accent {
    background-image: linear-gradient(120deg, var(--c-accent), var(--c-accent-600));
    color: var(--c-white);
  }
  .btn--accent:hover {
    color: var(--c-white);
  }

  .btn--ghost {
    background: var(--glass-bg-strong);
    color: var(--c-primary-700);
    border-color: var(--glass-border);
    box-shadow: var(--shadow-xs), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
  .btn--ghost:hover {
    color: var(--c-primary-700);
    border-color: var(--c-primary-300);
    box-shadow: var(--shadow-md);
  }

  .btn--lg {
    padding: 1rem 2.1rem;
    font-size: var(--fs-400);
    border-radius: var(--radius-md);
  }
  .btn--block {
    width: 100%;
  }

  /* ---------- Badge / floating glass eyebrow ---------- */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: 0.45rem 1rem;
    border-radius: var(--radius-pill);
    background: var(--glass-bg-strong);
    color: var(--c-primary-700);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    font-size: var(--fs-100);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.01em;
  }
  .badge::before {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-cyan), var(--c-primary-500));
    box-shadow: 0 0 0 4px rgb(56 189 248 / 0.18);
  }

  /* ---------- Hero ---------- */
  .hero {
    position: relative;
    padding-block: clamp(var(--sp-8), 7vw, var(--sp-9));
  }
  .hero__grid {
    display: grid;
    gap: var(--sp-7);
    align-items: center;
  }
  .hero__title {
    font-size: var(--fs-700);
    margin-top: var(--sp-4);
  }
  .hero__subtitle {
    font-size: var(--fs-400);
    color: var(--c-text-muted);
    margin-top: var(--sp-4);
    max-width: var(--measure);
  }
  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-3);
    margin-top: var(--sp-6);
  }
  .hero__media {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4 / 3; /* reserves space => zero CLS */
    background: var(--c-surface-sunken);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--glass-border);
  }
  .hero__media::after {
    /* subtle glass sheen over the image */
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgb(255 255 255 / 0.18), transparent 40%);
    pointer-events: none;
  }
  .hero__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--dur-slow) var(--ease);
  }
  .hero__media:hover img {
    transform: scale(1.04);
  }
  @media (min-width: 62em) {
    .hero__grid {
      grid-template-columns: 1.1fr 0.9fr;
    }
  }

  /* ---------- Section headings ---------- */
  .section__title {
    font-size: var(--fs-600);
  }
  .section__subtitle {
    font-size: var(--fs-400);
    color: var(--c-text-muted);
    margin-top: var(--sp-3);
  }

  /* =========================================================
     BENTO GRID — Services (.cards) & Benefits (.features)
     Asymmetric, interlocking tiles. 6 items tile a 4×3 grid:
       [ 1 1 2 2 ]
       [ 1 1 3 3 ]
       [ 4 5 6 6 ]
     ========================================================= */
  .cards {
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: 1fr; /* mobile-first: single column */
  }

  .card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    padding: var(--sp-6);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    isolation: isolate;
    transition: transform var(--dur) var(--ease-spring),
      box-shadow var(--dur) var(--ease),
      border-color var(--dur) var(--ease);
  }
  /* Aurora glow that fades in on hover */
  .card::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: -40% 40% 60% -40%;
    background: radial-gradient(closest-side, rgb(59 130 246 / 0.18), transparent);
    opacity: 0;
    transition: opacity var(--dur) var(--ease), transform var(--dur-slow) var(--ease);
  }
  .card:hover {
    transform: translateY(-6px) scale(1.015);
    box-shadow: var(--shadow-lg);
    border-color: var(--c-primary-200);
  }
  .card:hover::before {
    opacity: 1;
    transform: translate(20%, -10%);
  }
  .card__icon {
    display: grid;
    place-items: center;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-md);
    color: var(--c-primary-600);
    background: linear-gradient(135deg, var(--c-primary-050), #fff);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-xs), var(--shadow-inset-hi);
    transition: transform var(--dur) var(--ease-spring);
  }
  .card:hover .card__icon {
    transform: scale(1.08) rotate(-3deg);
  }
  .card__title {
    font-size: var(--fs-400);
  }
  .card__text {
    color: var(--c-text-muted);
    font-size: var(--fs-200);
    line-height: var(--lh-snug);
  }

  /* Featured tile (first card) — premium gradient, white text */
  .card:first-child {
    justify-content: space-between;
    background: linear-gradient(150deg, var(--c-primary-700), var(--c-violet) 130%);
    border-color: transparent;
    color: var(--c-white);
    box-shadow: var(--shadow-primary), var(--shadow-lg);
  }
  .card:first-child::before {
    background: radial-gradient(closest-side, rgb(34 211 238 / 0.35), transparent);
    inset: -30% -10% 40% 30%;
    opacity: 0.7;
  }
  .card:first-child .card__title {
    font-size: var(--fs-500);
    color: var(--c-white);
  }
  .card:first-child .card__text {
    color: rgb(255 255 255 / 0.85);
    font-size: var(--fs-300);
  }
  .card:first-child .card__icon {
    color: var(--c-white);
    background: rgb(255 255 255 / 0.16);
    border-color: rgb(255 255 255 / 0.28);
  }

  /* Tablet: 2 columns, featured spans full width */
  @media (min-width: 40em) {
    .cards {
      grid-template-columns: repeat(2, 1fr);
    }
    .card:first-child {
      grid-column: 1 / -1;
    }
  }

  /* Desktop: 4-column interlocking bento */
  @media (min-width: 64em) {
    .cards {
      grid-template-columns: repeat(4, 1fr);
      grid-auto-rows: 1fr;
      gap: var(--sp-5);
    }
    .card:first-child {
      grid-column: span 2;
      grid-row: span 2;
    }
    .card:nth-child(2) {
      grid-column: span 2;
    }
    .card:nth-child(3) {
      grid-column: span 2;
    }
    .card:nth-child(6) {
      grid-column: span 2;
    }
  }

  /* ---------- Benefits bento (.features) ---------- */
  .features {
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: 1fr;
  }
  .feature {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-3);
    padding: var(--sp-5);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: transform var(--dur) var(--ease-spring), box-shadow var(--dur) var(--ease);
  }
  .feature:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-md);
  }
  .feature__check {
    flex: none;
    display: grid;
    place-items: center;
    width: 1.9rem;
    height: 1.9rem;
    border-radius: var(--radius-pill);
    background: linear-gradient(135deg, #22c55e, var(--c-action));
    color: var(--c-white);
    font-weight: var(--fw-bold);
    box-shadow: 0 6px 14px -4px var(--c-action-glow);
  }
  .feature__text {
    font-weight: var(--fw-medium);
    color: var(--c-text);
  }
  @media (min-width: 40em) {
    .features {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (min-width: 64em) {
    .features {
      grid-template-columns: repeat(3, 1fr);
    }
    /* interlock: first benefit spans two columns for rhythm */
    .feature:first-child {
      grid-column: span 2;
    }
  }

  /* ---------- Error-code guide (boilers) ---------- */
  .errors {
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  }
  .errors__item {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-4) var(--sp-5);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: transform var(--dur) var(--ease-spring), box-shadow var(--dur) var(--ease);
  }
  .errors__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--c-accent), #fb923c);
  }
  .errors__item:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: var(--shadow-md);
  }
  .errors__code {
    flex: none;
    display: grid;
    place-items: center;
    min-width: 3.75rem;
    padding: 0.45rem 0.7rem;
    font-weight: var(--fw-bold);
    color: var(--c-accent-600);
    background: linear-gradient(135deg, #fff7ed, #ffedd5);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xs), var(--shadow-inset-hi);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.03em;
  }
  .errors__meaning {
    color: var(--c-text);
    font-weight: var(--fw-medium);
  }
  .errors__note {
    margin-top: var(--sp-5);
    color: var(--c-text-muted);
    font-size: var(--fs-200);
  }

  /* ---------- CTA banner ---------- */
  .cta {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    padding: clamp(var(--sp-7), 5vw, var(--sp-8));
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--c-primary-700), var(--c-primary-900));
    color: var(--c-white);
    box-shadow: var(--shadow-xl);
    text-align: center;
  }
  .cta::before,
  .cta::after {
    content: "";
    position: absolute;
    z-index: -1;
    border-radius: 50%;
    filter: blur(40px);
  }
  .cta::before {
    width: 26rem;
    height: 26rem;
    top: -10rem;
    right: -6rem;
    background: radial-gradient(closest-side, rgb(139 92 246 / 0.7), transparent);
  }
  .cta::after {
    width: 24rem;
    height: 24rem;
    bottom: -12rem;
    left: -6rem;
    background: radial-gradient(closest-side, rgb(34 211 238 / 0.55), transparent);
  }
  .cta__title {
    font-size: var(--fs-600);
    color: var(--c-white);
  }
  .cta__subtitle {
    margin-top: var(--sp-3);
    color: rgb(219 234 254 / 0.9);
    font-size: var(--fs-400);
  }
  .cta__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--sp-3);
    margin-top: var(--sp-6);
  }

  /* ---------- Footer ---------- */
  .footer {
    position: relative;
    margin-top: var(--sp-8);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    border-top: 1px solid var(--glass-border);
    box-shadow: var(--shadow-inset-hi);
    padding-block: var(--sp-7) var(--sp-6);
  }
  .footer__grid {
    display: grid;
    gap: var(--sp-6);
    grid-template-columns: 1fr;
  }
  @media (min-width: 48em) {
    .footer__grid {
      grid-template-columns: 1.5fr 1fr 1fr;
    }
  }
  .footer__title {
    font-size: var(--fs-200);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-text-subtle);
    margin-bottom: var(--sp-3);
  }
  .footer__about {
    color: var(--c-text-muted);
    max-width: 36ch;
  }
  .footer__link {
    display: inline-block;
    padding-block: var(--sp-1);
    color: var(--c-text-muted);
    transition: color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  }
  .footer__link:hover {
    color: var(--c-primary-700);
    transform: translateX(3px);
  }
  /* Contact rows with a leading icon */
  .footer__contact {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
  }
  .footer__contact-icon {
    flex: none;
    width: 1.05rem;
    height: 1.05rem;
    color: var(--c-primary-600);
  }
  .footer__bottom {
    margin-top: var(--sp-6);
    padding-top: var(--sp-5);
    border-top: 1px solid var(--c-border);
    color: var(--c-text-subtle);
    font-size: var(--fs-100);
  }

  /* ---------- Mobile action bar (fixed, glass) ---------- */
  .action-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 150;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-3);
    padding: var(--sp-2) var(--sp-3)
      calc(var(--sp-2) + env(safe-area-inset-bottom, 0px));
    height: calc(var(--mobile-bar-h) + env(safe-area-inset-bottom, 0px));
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-top: 1px solid var(--glass-border);
    box-shadow: 0 -10px 30px -12px rgb(15 23 42 / 0.25), var(--shadow-inset-hi);
  }
  .action-bar__btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border-radius: var(--radius-md);
    font-size: var(--fs-100);
    font-weight: var(--fw-semibold);
    color: var(--c-white);
    box-shadow: var(--shadow-sm);
    background-size: 200% 200%;
    background-position: 0% 50%;
    transition: transform var(--dur) var(--ease-spring),
      background-position var(--dur-slow) var(--ease), box-shadow var(--dur) var(--ease);
  }
  .action-bar__btn:hover {
    background-position: 100% 50%;
  }
  .action-bar__btn:active {
    transform: scale(0.97);
  }
  .action-bar__btn--call {
    background-image: linear-gradient(120deg, var(--c-action), #22c55e, var(--c-action-600));
  }
  .action-bar__btn--telegram {
    background-image: linear-gradient(120deg, var(--c-telegram), #2bb6ec, var(--c-telegram-600));
  }
  .action-bar__icon {
    width: 1.4rem;
    height: 1.4rem;
    fill: currentColor;
  }
  @media (min-width: 48em) {
    .action-bar {
      display: none;
    }
  }

  /* ---------- Trust badges (hero, floating glass over image) ---------- */
  .hero__visual {
    position: relative;
  }
  .trust-badge {
    position: absolute;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-md);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
    backdrop-filter: blur(12px) saturate(150%);
    animation: float 6s var(--ease) infinite;
  }
  .trust-badge__num {
    font-size: var(--fs-400);
    font-weight: var(--fw-extrabold);
    line-height: 1;
    color: var(--c-primary-700);
  }
  .trust-badge__label {
    font-size: var(--fs-100);
    font-weight: var(--fw-medium);
    color: var(--c-text-muted);
    line-height: 1.2;
  }
  .trust-badge--a { top: 1.25rem; left: -0.75rem; }
  .trust-badge--b { bottom: 1.5rem; right: -0.75rem; animation-delay: -3s; }
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
  }

  /* ---------- Brand marquee (infinite scroll) ---------- */
  .marquee {
    overflow: hidden;
    padding-block: var(--sp-4);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  }
  .marquee__track {
    display: flex;
    align-items: center;
    gap: clamp(2rem, 5vw, 4rem);
    width: max-content;
    animation: marquee 30s linear infinite;
  }
  .marquee:hover .marquee__track {
    animation-play-state: paused;
  }
  .marquee__item {
    font-size: clamp(1.25rem, 1rem + 1.4vw, 2rem);
    font-weight: var(--fw-extrabold);
    letter-spacing: -0.03em;
    color: var(--c-text-subtle);
    white-space: nowrap;
    opacity: 0.72;
    transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }
  .marquee__item:hover {
    color: var(--c-primary-600);
    opacity: 1;
  }
  @keyframes marquee {
    to { transform: translateX(-50%); }
  }

  /* ---------- Process timeline (glowing connected dots) ---------- */
  .process__list {
    position: relative;
    display: grid;
    gap: var(--sp-6);
    max-width: 44rem;
  }
  .process__list::before {
    content: "";
    position: absolute;
    left: 1.1rem;
    top: 0.6rem;
    bottom: 0.6rem;
    width: 2px;
    background: linear-gradient(180deg, var(--c-primary-400), var(--c-violet), var(--c-cyan));
    opacity: 0.4;
  }
  .process__step {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--sp-4);
    align-items: start;
  }
  .process__dot {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    font-weight: var(--fw-bold);
    color: var(--c-white);
    background: linear-gradient(135deg, var(--c-primary-500), var(--c-violet));
    box-shadow: 0 0 0 6px rgb(37 99 235 / 0.12), var(--shadow-primary);
  }
  .process__step-title {
    font-size: var(--fs-400);
  }
  .process__step-text {
    margin-top: var(--sp-1);
    color: var(--c-text-muted);
    font-size: var(--fs-200);
  }

  /* ---------- Scroll-interactive timeline (--fill set by JS) ---------- */
  .timeline {
    --fill: 0%;
    --rail: 1.375rem; /* node radius => track x-position */
    position: relative;
    max-width: 46rem;
  }
  /* The static rail (background track) */
  .timeline__track {
    position: absolute;
    left: var(--rail);
    top: var(--rail);
    bottom: var(--rail);
    width: 3px;
    transform: translateX(-50%);
    background: var(--c-border-strong);
    border-radius: 3px;
    overflow: hidden;
  }
  /* The animated fill (vibrant CTA gradient) grows to --fill */
  .timeline__progress {
    position: absolute;
    inset: 0 0 auto 0;
    height: var(--fill);
    background: linear-gradient(180deg, var(--c-action), #22c55e 45%, var(--c-primary-500));
    box-shadow: 0 0 14px rgb(22 163 74 / 0.55);
    transition: height 0.12s linear;
    will-change: height;
  }
  .timeline__steps {
    display: grid;
    gap: var(--sp-6);
  }
  .timeline__step {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--sp-4);
    align-items: start;
  }
  .timeline__node {
    position: relative;
    z-index: 1;
    align-self: center;            /* vertically centre the node against its card */
    display: grid;
    place-items: center;
    width: calc(var(--rail) * 2);
    height: calc(var(--rail) * 2);
    border-radius: 50%;
    background: var(--c-surface);
    border: 2px solid var(--c-border-strong);
    color: var(--c-text-subtle);
    box-shadow: var(--shadow-sm);
    transition: transform 0.4s var(--ease-spring), background-color 0.35s var(--ease),
      border-color 0.35s var(--ease), color 0.35s var(--ease), box-shadow 0.35s var(--ease);
  }
  .timeline__node svg {
    width: 1.25rem;
    height: 1.25rem;
  }
  .timeline__media {
    aspect-ratio: 16 / 9;         /* reserves space => zero CLS */
    margin-bottom: var(--sp-3);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--c-surface-sunken);
  }
  .timeline__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--dur-slow) var(--ease);
  }
  .timeline__step.is-active .timeline__media img {
    transform: scale(1.05);
  }
  .timeline__card {
    padding: var(--sp-4) var(--sp-5);
    border-radius: var(--radius-lg);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    opacity: 0.5;
    transform: translateY(8px);
    transition: opacity 0.45s var(--ease), transform 0.45s var(--ease-spring),
      box-shadow 0.45s var(--ease), border-color 0.45s var(--ease);
  }
  .timeline__card-title {
    font-size: var(--fs-400);
  }
  .timeline__card-text {
    margin-top: var(--sp-1);
    color: var(--c-text-muted);
    font-size: var(--fs-200);
  }

  /* Active state: node lights up with the CTA gradient, card floats in */
  .timeline__step.is-active .timeline__node {
    border-color: transparent;
    color: var(--c-white);
    background: linear-gradient(135deg, var(--c-action), #22c55e);
    box-shadow: 0 0 0 6px rgb(22 163 74 / 0.15), var(--shadow-action);
    transform: scale(1.08);
  }
  .timeline__step.is-active .timeline__card {
    opacity: 1;
    transform: none;
    box-shadow: var(--shadow-md), var(--shadow-inset-hi);
    border-color: color-mix(in srgb, var(--c-action) 32%, var(--glass-border));
  }

  /* No-JS / reduced-motion: everything reads at full strength */
  @media (prefers-reduced-motion: reduce) {
    .timeline__card { opacity: 1; transform: none; }
    .timeline__media img { transform: none; }
    .timeline__progress { transition: none; }
  }

  /* Desktop: centre the rail, alternate cards left / right (zig-zag) */
  @media (min-width: 64em) {
    .timeline {
      max-width: 62rem;
      margin-inline: auto;
    }
    .timeline__track {
      left: 50%;
      top: 0;
      bottom: 0;
    }
    .timeline__steps {
      gap: var(--sp-7);
    }
    /* Node is pinned to the centre line; card takes one half.
       This guarantees the node is vertically centred on its card. */
    .timeline__step {
      display: block;
      position: relative;
    }
    .timeline__node {
      position: absolute;
      left: 50%;
      top: 50%;
      margin-left: calc(var(--rail) * -1); /* half node width -> horizontal centre */
      margin-top: calc(var(--rail) * -1);  /* half node height -> vertical centre  */
    }
    /* odd steps -> left side, text hugs the centre line */
    .timeline__card {
      width: calc(50% - var(--sp-6));
      text-align: right;
    }
    /* even steps -> right side */
    .timeline__step:nth-child(even) .timeline__card {
      margin-left: auto;
      text-align: left;
    }
  }

  /* ---------- Tabbed interface (brand error guide) ---------- */
  .tabs {
    display: grid;
    gap: var(--sp-5);
    grid-template-columns: 1fr; /* mobile: tabs stack above panels */
  }
  .tabs__list {
    display: flex;
    gap: var(--sp-2);
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: var(--sp-1);
  }
  .tabs__list::-webkit-scrollbar {
    display: none;
  }
  .tabs__tab {
    flex: none;
    text-align: left;
    padding: 0.75rem 1.1rem;
    border-radius: var(--radius-md);
    font-weight: var(--fw-semibold);
    color: var(--c-text-muted);
    border: 1px solid transparent;
    white-space: nowrap;
    transition: color var(--dur-fast) var(--ease),
      background-color var(--dur-fast) var(--ease),
      box-shadow var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  }
  .tabs__tab:hover {
    color: var(--c-text);
    background: var(--c-surface-muted);
  }
  .tabs__tab[aria-selected="true"] {
    color: var(--c-primary-700);
    background: var(--glass-bg-strong);
    border-color: var(--glass-border);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
  .tabs__panels {
    min-width: 0;
  }
  .tabs__panel {
    animation: fade-in var(--dur) var(--ease);
  }
  .tabs__panel-title {
    font-size: var(--fs-400);
    margin-bottom: var(--sp-4);
  }
  @keyframes fade-in {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }
  @media (min-width: 48em) {
    .tabs {
      grid-template-columns: 15rem 1fr;
      align-items: start;
    }
    .tabs__list {
      flex-direction: column;
      overflow: visible;
      position: sticky;
      top: 6rem;
    }
    .tabs__tab {
      width: 100%;
    }
  }

  /* ---------- Inline contact form (glass card, no modal) ---------- */
  .form-card {
    max-width: 46rem;
    margin-inline: auto;
    padding: clamp(var(--sp-6), 4vw, var(--sp-8));
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(14px) saturate(150%);
    backdrop-filter: blur(14px) saturate(150%);
    text-align: center;
  }
  .form {
    margin-top: var(--sp-6);
    text-align: left;
  }
  .form__grid {
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: 1fr;
  }
  .form__field {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
  }
  .form__label {
    font-size: var(--fs-100);
    font-weight: var(--fw-semibold);
    color: var(--c-text-muted);
  }
  .form__input,
  .form__select {
    width: 100%;
    padding: 0.9rem 1rem;
    font: inherit;
    color: var(--c-text);
    background: var(--c-surface);
    border: 1px solid var(--c-border-strong);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
    transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  }
  .form__select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.75rem;
  }
  .form__input::placeholder {
    color: var(--c-text-subtle);
  }
  .form__input:focus,
  .form__select:focus {
    outline: none;
    border-color: var(--c-primary-400);
    box-shadow: var(--ring);
  }
  .form__actions {
    margin-top: var(--sp-5);
    display: grid;
    gap: var(--sp-3);
    justify-items: stretch;
  }
  .form__note {
    font-size: var(--fs-100);
    color: var(--c-text-subtle);
    text-align: center;
  }
  @media (min-width: 40em) {
    .form__grid {
      grid-template-columns: 1fr 1fr;
    }
    .form__field--full {
      grid-column: 1 / -1;
    }
  }

  /* ---------- Scroll reveal (driven by Reveal.js) ---------- */
  [data-reveal] {
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease-spring);
    transition-delay: var(--reveal-delay, 0ms);
  }
  /* Hidden start-state applies ONLY when JS is present (adds .reveal-ready),
     so no-JS visitors and crawlers still see everything. */
  html.reveal-ready [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
  }
  html.reveal-ready [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
  @media (prefers-reduced-motion: reduce) {
    [data-reveal] {
      opacity: 1 !important;
      transform: none !important;
      transition: none;
    }
  }

  /* ---------- About section ---------- */
  .about {
    position: relative;
    overflow: hidden;
  }
  /* Local aurora glow (in addition to the global body glow) */
  .about::before {
    content: "";
    position: absolute;
    z-index: -1;
    width: 42rem;
    height: 42rem;
    top: -14rem;
    right: -16rem;
    background: radial-gradient(closest-side, rgb(139 92 246 / 0.16), transparent);
    filter: blur(30px);
    pointer-events: none;
  }
  .about__grid {
    display: grid;
    gap: var(--sp-7);
    align-items: center;
  }
  @media (min-width: 62em) {
    .about__grid {
      grid-template-columns: 0.9fr 1.1fr;
    }
  }

  /* --- Image composition (organic masked photo + floating elements) --- */
  .about__media {
    position: relative;
    min-height: 22rem;
    display: grid;
    place-items: center;
  }
  .about__blob {
    position: absolute;
    z-index: 0;
    width: 84%;
    height: 90%;
    background: linear-gradient(140deg, var(--c-primary-400), var(--c-violet));
    border-radius: 42% 58% 55% 45% / 45% 42% 58% 55%;
    filter: blur(8px);
    opacity: 0.35;
  }
  .about__img-main {
    position: relative;
    z-index: 1;
    width: min(100%, 24rem);
    aspect-ratio: 5 / 6;
    object-fit: cover;
    border: 5px solid var(--c-white);
    border-radius: 46% 54% 52% 48% / 48% 46% 54% 52%; /* organic blob mask */
    box-shadow: var(--shadow-xl);
  }
  .about__img-float {
    position: absolute;
    z-index: 2;
    right: 6%;
    bottom: -0.5rem;
    width: 9rem;
    height: 9rem;
    object-fit: cover;
    border: 5px solid var(--c-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 6s var(--ease) infinite;
  }
  .about__float-badge {
    position: absolute;
    z-index: 3;
    left: 0;
    bottom: 3.5rem;
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-md);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
    backdrop-filter: blur(12px) saturate(150%);
    font-size: var(--fs-100);
    font-weight: var(--fw-semibold);
    animation: float 6s var(--ease) infinite;
    animation-delay: -3s;
  }
  .about__float-badge-num {
    display: grid;
    place-items: center;
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-action), #22c55e);
    color: var(--c-white);
    font-weight: var(--fw-bold);
  }

  /* --- Story column --- */
  .about__content {
    display: grid;
    justify-items: start;
    gap: var(--sp-4);
  }
  .about__title {
    font-size: var(--fs-600);
  }
  .about__lead {
    color: var(--c-text-muted);
    font-size: var(--fs-400);
    max-width: var(--measure);
  }

  /* --- Local trust card (softly glowing glass) --- */
  .about__trust {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: var(--sp-4);
    margin-top: var(--sp-2);
    padding: var(--sp-5);
    border-radius: var(--radius-lg);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }
  .about__trust::before {
    content: "";
    position: absolute;
    z-index: -1;
    width: 16rem;
    height: 16rem;
    top: -8rem;
    right: -6rem;
    background: radial-gradient(closest-side, rgb(34 211 238 / 0.35), transparent);
    filter: blur(18px);
  }
  .about__trust-icon {
    flex: none;
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-cyan), var(--c-primary-500));
    color: var(--c-white);
    box-shadow: var(--shadow-sm);
  }
  .about__trust-badge {
    display: inline-block;
    font-size: var(--fs-100);
    font-weight: var(--fw-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-primary-700);
  }
  .about__trust-title {
    font-size: var(--fs-400);
    margin-top: 2px;
  }
  .about__trust-text {
    margin-top: var(--sp-1);
    color: var(--c-text-muted);
    font-size: var(--fs-200);
  }

  /* --- Bento stats grid --- */
  .about__stats {
    margin-top: var(--sp-7);
    display: grid;
    gap: var(--sp-4);
    grid-template-columns: 1fr;
  }
  .about__stat {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--sp-1);
    padding: var(--sp-6);
    border-radius: var(--radius-lg);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm), var(--shadow-inset-hi);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: transform var(--dur) var(--ease-spring), box-shadow var(--dur) var(--ease);
  }
  .about__stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
  }
  .about__stat-num {
    font-size: var(--fs-600);
    font-weight: var(--fw-extrabold);
    line-height: 1;
    background: linear-gradient(120deg, var(--c-primary-600), var(--c-violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .about__stat-label {
    color: var(--c-text-muted);
    font-weight: var(--fw-medium);
  }
  /* Featured stat tile */
  .about__stat:first-child {
    background: linear-gradient(150deg, var(--c-primary-700), var(--c-violet) 130%);
    border-color: transparent;
    box-shadow: var(--shadow-primary), var(--shadow-lg);
  }
  .about__stat:first-child .about__stat-num {
    font-size: var(--fs-700);
    background: none;
    color: var(--c-white);
    -webkit-text-fill-color: var(--c-white);
  }
  .about__stat:first-child .about__stat-label {
    color: rgb(255 255 255 / 0.85);
    font-size: var(--fs-400);
  }
  @media (min-width: 40em) {
    .about__stats {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  /* Desktop: asymmetric interlocking bento (featured 2×2) */
  @media (min-width: 64em) {
    .about__stats {
      grid-template-columns: repeat(4, 1fr);
      grid-auto-rows: 1fr;
    }
    .about__stat:nth-child(1) {
      grid-column: span 2;
      grid-row: span 2;
    }
    .about__stat:nth-child(2) {
      grid-column: span 2;
    }
  }

  /* ---------- Modern CTA banner (dark aurora card + pill buttons) ---------- */
  .cta-banner {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    padding: clamp(2rem, 5vw, 4.5rem) clamp(1.25rem, 4vw, 3.5rem);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #0a1122, #16233f 55%, #0a1122);
    border: 1px solid rgb(255 255 255 / 0.12);
    box-shadow: var(--shadow-xl);
    color: var(--c-white);
    text-align: center;
  }
  /* Aurora glows inside the dark card */
  .cta-banner::before,
  .cta-banner::after {
    content: "";
    position: absolute;
    z-index: -1;
    border-radius: 50%;
    filter: blur(44px);
    pointer-events: none;
  }
  .cta-banner::before {
    width: 32rem;
    height: 32rem;
    top: -13rem;
    left: -9rem;
    background: radial-gradient(closest-side, rgb(37 99 235 / 0.6), transparent);
  }
  .cta-banner::after {
    width: 30rem;
    height: 30rem;
    bottom: -15rem;
    right: -9rem;
    background: radial-gradient(closest-side, rgb(34 211 238 / 0.42), transparent);
  }
  .cta-banner__glow {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(42rem 22rem at 50% 130%, rgb(139 92 246 / 0.4), transparent 70%);
    animation: cta-pulse 8s var(--ease) infinite alternate;
  }
  @keyframes cta-pulse {
    from { opacity: 0.55; transform: scale(1); }
    to { opacity: 1; transform: scale(1.08); }
  }

  .cta-banner__title {
    font-size: var(--fs-700);
    letter-spacing: -0.02em;
    color: var(--c-white);
  }
  .cta-banner__title-accent {
    display: block;
    background: linear-gradient(120deg, var(--c-sky), #a78bfa 55%, var(--c-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 0 26px rgb(56 189 248 / 0.45)); /* glow on the gradient text */
  }
  .cta-banner__subtitle {
    margin: var(--sp-4) auto 0;
    max-width: 48ch;
    color: rgb(226 232 240 / 0.82);
    font-size: var(--fs-400);
  }

  .cta-banner__actions {
    margin-top: var(--sp-6);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--sp-3);
  }

  /* Pill buttons */
  .pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.9rem;
    border-radius: var(--radius-pill);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-400);
    color: var(--c-white);
    white-space: nowrap;
    border: 1px solid transparent;
    background-size: 200% 200%;
    background-position: 0% 50%;
    transition: transform var(--dur) var(--ease-spring),
      box-shadow var(--dur) var(--ease), background-position var(--dur-slow) var(--ease);
  }
  .pill:active {
    transform: scale(0.98);
  }
  .pill svg {
    width: 1.25rem;
    height: 1.25rem;
    fill: currentColor;
  }
  /* Phone — energetic green with a glowing pulse on hover */
  .pill--phone {
    background-image: linear-gradient(120deg, var(--c-action), #22c55e, var(--c-action-600));
    box-shadow: 0 12px 30px -8px rgb(22 163 74 / 0.6);
  }
  .pill--phone:hover {
    color: var(--c-white);
    background-position: 100% 50%;
    transform: translateY(-2px);
    animation: pulse-glow 1.5s ease-out infinite;
  }
  @keyframes pulse-glow {
    0% { box-shadow: 0 12px 30px -8px rgb(22 163 74 / 0.6), 0 0 0 0 rgb(22 163 74 / 0.5); }
    70% { box-shadow: 0 12px 30px -8px rgb(22 163 74 / 0.6), 0 0 0 18px rgb(22 163 74 / 0); }
    100% { box-shadow: 0 12px 30px -8px rgb(22 163 74 / 0.6), 0 0 0 0 rgb(22 163 74 / 0); }
  }
  /* Telegram — sleek blue, scales up on hover */
  .pill--telegram {
    background-image: linear-gradient(120deg, var(--c-telegram), #2bb6ec, var(--c-telegram-600));
    box-shadow: 0 12px 30px -8px rgb(34 158 217 / 0.55);
  }
  .pill--telegram:hover {
    color: var(--c-white);
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 16px 40px -8px rgb(34 158 217 / 0.72);
  }

  /* Mobile: stack the pills full-width */
  @media (max-width: 30em) {
    .cta-banner__actions {
      flex-direction: column;
    }
    .pill {
      width: 100%;
    }
  }

  /* ---------- Glass fallback: no backdrop-filter support ---------- */
  @supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
    .header,
    .lang,
    .badge,
    .btn--ghost,
    .feature,
    .footer,
    .action-bar,
    .trust-badge,
    .form-card,
    .timeline__card,
    .about__float-badge,
    .about__trust,
    .about__stat {
      background: var(--c-surface);
    }
  }
}

/* =============================================================
   UTILITIES
   ============================================================= */
@layer utilities {
  .visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
  }

  .text-center { text-align: center; }
  .text-muted { color: var(--c-text-muted); }
  .text-gradient {
    background: linear-gradient(120deg, var(--c-primary-600), var(--c-violet) 55%, var(--c-cyan));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .mx-auto { margin-inline: auto; }
  .mt-4 { margin-top: var(--sp-4); }
  .mt-6 { margin-top: var(--sp-6); }

  [hidden] { display: none !important; }

  .hide-desktop { display: revert; }
  .hide-mobile { display: none; }
  @media (min-width: 48em) {
    .hide-desktop { display: none; }
    .hide-mobile { display: revert; }
  }
}