:root {
  --bg: #0f172a;
  --bg-soft: #111b33;
  --panel: #16213d;
  --panel-2: #1b2747;
  --text: #dbe7ff;
  --muted: #99a7c7;
  --accent: #4fd1c5;
  --accent-2: #6ee7ff;
  --line: #2a3a63;
  --danger: #f87171;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(circle at 20% -10%, rgba(79, 209, 197, 0.12), transparent 35%),
    radial-gradient(circle at 90% 0%, rgba(110, 231, 255, 0.1), transparent 28%),
    linear-gradient(180deg, #0b1327 0%, var(--bg) 60%, #0c162f 100%);
  color: var(--text);
}

nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin: 10px 18px 0;
  padding: 12px 16px;
  border: 1px solid rgba(84, 109, 162, 0.45);
  border-radius: 14px;
  box-shadow: 0 14px 28px rgba(2, 10, 28, 0.35);
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(26, 39, 70, 0.94), rgba(19, 31, 58, 0.9));
}

nav .nav-links,
nav .language-toggle {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
}

nav a {
  color: #d7e6ff;
  text-decoration: none;
  margin-right: 0;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 5px 8px;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent-2);
  background: rgba(73, 114, 193, 0.24);
  border-color: rgba(110, 231, 255, 0.35);
}

nav a.active,
nav a[aria-current="page"] {
  color: #ecfeff;
  background: rgba(79, 209, 197, 0.18);
  border-color: rgba(79, 209, 197, 0.65);
  box-shadow: inset 0 -2px 0 var(--accent);
}

nav button,
button {
  background: linear-gradient(135deg, #1f766f, #245ea4);
  border: 1px solid #3a8bb6;
  color: #ecfeff;
  border-radius: 10px;
  padding: 7px 12px;
}

nav button {
  margin-left: 4px;
}

button:hover { filter: brightness(1.08); }

main {
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 18px 24px;
}

main > h1,
main > p,
main > .controls,
main > .filters,
main > details,
main > table,
main > section,
main > .testbench-layout,
main > .pagination,
main > #errorBox,
main > textarea,
main > h2 {
  background: linear-gradient(180deg, rgba(26, 39, 70, 0.86), rgba(19, 31, 58, 0.86));
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 28px rgba(2, 10, 28, 0.35);
}

main > h1,
main > p,
main > h2,
main > .controls,
main > .filters,
main > details,
main > .pagination,
main > #errorBox {
  padding: 12px 14px;
}

input,
select,
textarea {
  background: #0d1833;
  border: 1px solid #31436f;
  color: var(--text);
  border-radius: 10px;
  padding: 9px 11px;
}

table { overflow: hidden; }
th { background: #21325a; color: #dff8ff; border-color: #324b80; }
td { background: rgba(15, 25, 48, 0.82); border-color: #293d6b; }
tbody tr:hover td { background: rgba(34, 56, 100, 0.7); }

.page-help { background: linear-gradient(180deg, rgba(30, 44, 78, 0.86), rgba(18, 31, 60, 0.86)); border-color: #324a80; }
.page-help summary { color: #b9d4ff; }
.doc-note {
  border-left-color: var(--accent);
  background: rgba(79, 209, 197, 0.1);
}

.module-button { background: #122346; border-color: #33528a; color: var(--text); border-radius: 10px; }
.module-button:hover { background: #1b315e; }

.modal-overlay { background: rgba(2, 6, 18, 0.82); }
#modalImage { border: 2px solid #365f9d; border-radius: 10px; box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45); }

@media (max-width: 900px) {
  .testbench-layout { grid-template-columns: 1fr; }
  nav {
    margin: 8px 12px 0;
    align-items: flex-start;
    gap: 10px;
  }
}


html.i18n-loading body {
  visibility: hidden;
}

.i18n-loader-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: rgba(6, 11, 25, 0.9);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

html.i18n-loading .i18n-loader-overlay {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.i18n-loader {
  width: 78px;
  height: 78px;
  border-radius: 50%;
  border: 3px solid rgba(110, 231, 255, 0.2);
  border-top-color: var(--accent-2);
  border-right-color: var(--accent);
  box-shadow: 0 0 24px rgba(79, 209, 197, 0.28);
  position: relative;
  animation: i18n-spin 0.9s linear infinite;
}

.i18n-loader::before,
.i18n-loader::after {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  border: 2px solid transparent;
}

.i18n-loader::before {
  border-left-color: rgba(110, 231, 255, 0.9);
  animation: i18n-spin-reverse 1.1s linear infinite;
}

.i18n-loader::after {
  inset: 24px;
  border-top-color: rgba(79, 209, 197, 0.9);
  animation: i18n-pulse 1.2s ease-in-out infinite;
}

@keyframes i18n-spin {
  to { transform: rotate(360deg); }
}

@keyframes i18n-spin-reverse {
  to { transform: rotate(-360deg); }
}

@keyframes i18n-pulse {
  0%, 100% { opacity: 0.6; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1.06); }
}