.theme-ru {
  --ink: #0f172a;
  --paper: #eef2f7;
  --card: rgba(255, 255, 255, 0.82);
  --card-border: rgba(12, 18, 32, 0.08);
  --muted: #4a5568;
  --accent: #1e40af;
  --accent-2: #94a3b8;
  --accent-text: #fff;
  --ok: #0d3d2e;
  --ok-bg: rgba(13, 61, 46, 0.12);
  --err: #5c1a1a;
  --err-bg: rgba(92, 26, 26, 0.12);
  --shadow: 0 24px 60px rgba(8, 15, 35, 0.18);
  --radius: 16px;
  --font-sans: "Manrope", system-ui, sans-serif;
  --font-serif: "Literata", Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  .theme-ru {
    --ink: #e8edf7;
    --paper: #0b0f18;
    --card: rgba(22, 30, 48, 0.72);
    --card-border: rgba(255, 255, 255, 0.08);
    --muted: #9aa8c4;
    --accent: #3b82f6;
    --accent-2: #f5d547;
    --ok-bg: rgba(52, 211, 153, 0.12);
    --err-bg: rgba(248, 113, 113, 0.12);
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body.theme-ru {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: radial-gradient(circle at 1px 1px, rgba(30, 64, 175, 0.1) 1px, transparent 0);
  background-size: 28px 28px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 4vw;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--card-border);
}

.brand {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.92rem;
  padding: 0.35rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

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

.nav a.is-active {
  color: var(--ink);
  border-color: var(--accent);
}

.hero {
  position: relative;
  min-height: min(72vh, 720px);
  display: flex;
  align-items: flex-end;
  padding: 4rem 4vw 3rem;
  background-image: linear-gradient(
      115deg,
      rgba(10, 18, 32, 0.82) 0%,
      rgba(25, 45, 70, 0.55) 45%,
      rgba(0, 0, 0, 0.28) 100%
    ),
    var(--hero-img);
  background-size: cover;
  background-position: center;
  color: #f4f7ff;
}

.hero__inner {
  max-width: 720px;
}

.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  opacity: 0.85;
  margin: 0 0 0.75rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}

.hero__lead {
  margin: 0 0 1.75rem;
  font-size: 1.05rem;
  max-width: 38rem;
  opacity: 0.95;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: linear-gradient(120deg, var(--accent), #0f172a);
  color: var(--accent-text);
  box-shadow: 0 12px 30px rgba(15, 30, 70, 0.38);
}

.btn--primary:hover {
  box-shadow: 0 16px 44px rgba(15, 30, 70, 0.5);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn--block {
  width: 100%;
}

.btn--small {
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--card-border));
}

.btn--outline:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.cards {
  padding: 2.5rem 4vw 3rem;
  max-width: 1120px;
  margin: 0 auto;
}

.cards--2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  display: grid;
  grid-template-rows: 200px auto;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
}

.feature-card__media {
  background-image: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.55)), var(--card-img);
  background-size: cover;
  background-position: center;
}

.feature-card__body {
  padding: 1.35rem 1.35rem 1.5rem;
}

.feature-card__body h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 0.5rem;
}

.feature-card__body p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.text-link {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.page {
  padding: 2rem 4vw 3.5rem;
}

.page.narrow {
  max-width: 720px;
  margin: 0 auto;
}

.page-head h1 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
}

.muted {
  color: var(--muted);
}

.muted.small {
  font-size: 0.9rem;
}

.req {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}

.back {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.back:hover {
  text-decoration: underline;
}

.banner {
  margin: 1.25rem 0;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  font-size: 0.95rem;
}

.banner.ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.banner.err {
  background: var(--err-bg);
  color: var(--err);
}

.ref-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  border: 1px dashed var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  margin-bottom: 1.25rem;
}

.ref-box__label {
  font-size: 0.85rem;
  color: var(--muted);
}

.ref-box__code {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.panel {
  margin-top: 0.5rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.panel input[type="text"],
.panel input[type="search"],
.panel textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: color-mix(in srgb, var(--paper) 70%, transparent);
  color: var(--ink);
  font: inherit;
}

.panel input[type="file"] {
  font-size: 0.85rem;
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.results {
  margin-top: 2rem;
}

.results__meta {
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th,
.data-table td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
  vertical-align: top;
}

.data-table th {
  font-weight: 600;
  background: color-mix(in srgb, var(--paper) 60%, transparent);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.nowrap {
  white-space: nowrap;
}

.foot {
  padding: 2rem 4vw;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--card-border);
}

.foot p {
  max-width: 52rem;
  margin: 0 auto;
}

.foot__photos {
  margin-top: 0.65rem;
  font-size: 0.78rem;
  opacity: 0.78;
}

/* ---- Responsive: tablet & phone ---- */
@media (max-width: 900px) {
  .hero {
    min-height: min(62vh, 560px);
    padding: 3rem max(4vw, env(safe-area-inset-left, 0px)) 2.5rem
      max(4vw, env(safe-area-inset-right, 0px));
  }

  .hero__title {
    font-size: clamp(1.55rem, 5vw, 2.4rem);
  }

  .cards {
    padding: 2rem max(4vw, env(safe-area-inset-left, 0px)) 2.5rem;
  }

  .page {
    padding: 1.5rem max(4vw, env(safe-area-inset-left, 0px)) 2.75rem;
  }

  .page-head h1 {
    font-size: 1.45rem;
  }
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.65rem;
    padding: max(0.75rem, env(safe-area-inset-top, 0px)) max(4vw, env(safe-area-inset-left, 0px))
      0.75rem max(4vw, env(safe-area-inset-right, 0px));
  }

  .brand {
    font-size: 1rem;
    line-height: 1.3;
  }

  .nav {
    gap: 0.25rem 0.75rem;
    justify-content: flex-start;
  }

  .nav a {
    font-size: 0.9rem;
    padding: 0.55rem 0.15rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .hero {
    min-height: min(52vh, 480px);
    padding: 2rem max(4vw, env(safe-area-inset-left, 0px)) 1.75rem
      max(4vw, env(safe-area-inset-right, 0px));
    align-items: flex-end;
  }

  .hero__lead {
    font-size: 0.98rem;
    margin-bottom: 1.25rem;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    width: 100%;
    min-height: 48px;
    justify-content: center;
  }

  .cards--2 {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }

  .feature-card {
    grid-template-rows: min(44vw, 220px) auto;
  }

  .feature-card__body h2 {
    font-size: 1.2rem;
  }

  .panel {
    padding: 1.1rem;
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .form-actions .btn {
    width: 100%;
    min-height: 48px;
    justify-content: center;
  }

  .ref-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .ref-box__code {
    font-size: 1rem;
    word-break: break-all;
    max-width: 100%;
  }

  .data-table {
    font-size: 0.8rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.5rem 0.55rem;
  }

  .table-wrap {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }

  .foot {
    padding: 1.5rem max(4vw, env(safe-area-inset-left, 0px)) max(2rem, env(safe-area-inset-bottom, 0px));
  }

  .row-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .panel input[type="text"],
  .panel input[type="search"],
  .panel textarea {
    font-size: 16px;
  }

  .btn {
    min-height: 46px;
  }

  .btn--small {
    min-height: 44px;
    width: 100%;
    justify-content: center;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .cards--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}