/* Useful Kit — design tokens */
:root {
  --bg-deep: #070a0f;
  --bg-surface: #0f1419;
  --bg-card: #141c26;
  --bg-elevated: #1a2433;
  --border: rgba(94, 234, 212, 0.12);
  --border-strong: rgba(94, 234, 212, 0.28);
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --accent: #2dd4bf;
  --accent-dim: #14b8a6;
  --accent-glow: rgba(45, 212, 191, 0.35);
  --danger: #f87171;
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Ambient gradient */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(45, 212, 191, 0.14), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(20, 184, 166, 0.06), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(45, 212, 191, 0.05), transparent);
  z-index: -1;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.uk-container {
  width: min(1180px, 100% - 2rem);
  margin-inline: auto;
}

.uk-skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 600;
  border-radius: var(--radius-sm);
}
.uk-skip-link:focus {
  left: 1rem;
  top: 1rem;
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* Header */
.uk-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(7, 10, 15, 0.78);
  border-bottom: 1px solid var(--border);
}

.uk-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.uk-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.uk-brand:hover {
  text-decoration: none;
  color: var(--accent);
}
.uk-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, var(--accent-dim), var(--accent));
  display: grid;
  place-items: center;
  box-shadow: 0 0 24px var(--accent-glow);
}
.uk-brand-mark svg {
  width: 20px;
  height: 20px;
  color: var(--bg-deep);
}

.uk-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.uk-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border-radius: 8px;
  text-decoration: none;
}
.uk-nav a:hover {
  color: var(--text);
  background: var(--bg-elevated);
  text-decoration: none;
}

/* Hero */
.uk-hero {
  padding: 3rem 0 2.5rem;
  text-align: center;
}
.uk-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.uk-hero p {
  margin: 0 auto;
  max-width: 520px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.uk-hero--compact {
  padding: 2rem 0 3rem;
  text-align: center;
}
.uk-hero--compact h1 {
  margin-bottom: 0.75rem;
}
.uk-hero--compact p {
  margin-left: auto;
  margin-right: auto;
}

.uk-cat-block {
  margin-bottom: 0.5rem;
}
.uk-cat-block[hidden] {
  display: none !important;
}

.uk-search-wrap {
  margin-top: 1.75rem;
  max-width: 440px;
  margin-inline: auto;
}
.uk-search {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.uk-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.uk-search-wrap {
  position: relative;
}
.uk-search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

/* Sections */
.uk-section {
  padding: 1.5rem 0 4rem;
}
.uk-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 2rem 0 1rem;
  font-weight: 600;
}
.uk-section-title:first-child {
  margin-top: 0;
}

.uk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}

.uk-card {
  display: block;
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  position: relative;
  overflow: hidden;
}
.uk-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
}
.uk-card-title {
  font-weight: 600;
  font-size: 0.98rem;
  margin: 0 0 0.35rem;
  letter-spacing: -0.01em;
}
.uk-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.uk-badge {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.45rem;
  border-radius: 6px;
  background: rgba(45, 212, 191, 0.15);
  color: var(--accent);
}
.uk-card[hidden] {
  display: none !important;
}

/* Tool page */
.uk-tool-head {
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.uk-tool-head h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.uk-tool-head p,
.uk-tool-lead {
  margin: 0;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.6;
}

.uk-breadcrumb {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.uk-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.uk-breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.uk-breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--border-strong);
  font-weight: 300;
  margin-left: 0.25rem;
}
.uk-breadcrumb a {
  color: var(--text-muted);
}
.uk-breadcrumb a:hover {
  color: var(--accent);
}
.uk-breadcrumb [aria-current="page"] {
  color: var(--text);
  font-weight: 500;
}

.uk-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.uk-panel label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

textarea.uk-input {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
}
textarea.uk-input:focus {
  border-color: var(--accent);
}

.uk-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
}

.uk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: none;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: filter 0.12s, transform 0.12s;
}
.uk-btn-primary {
  background: linear-gradient(145deg, var(--accent-dim), var(--accent));
  color: var(--bg-deep);
}
.uk-btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}
.uk-btn-ghost {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}
.uk-btn-ghost:hover {
  border-color: var(--border-strong);
}

.uk-out {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.88rem;
  margin: 0;
  padding: 1rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  max-height: 420px;
  overflow: auto;
}
.uk-err {
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.uk-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0.75rem 0;
}
.uk-checks label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  text-transform: none;
  font-weight: 500;
  cursor: pointer;
}
.uk-checks input {
  accent-color: var(--accent);
}

.uk-footer {
  margin-top: 4rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.uk-footer-inner {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
}

.uk-footer-tagline {
  margin: 0 0 1rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.uk-footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}
.uk-footer-nav a {
  color: var(--accent);
  font-weight: 500;
}

.uk-footer-copy {
  margin: 0;
  font-size: 0.8rem;
  opacity: 0.85;
}

.uk-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  color: var(--text-muted);
}
.uk-back:hover {
  color: var(--accent);
}

input[type="number"].uk-num {
  width: 5rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
}

.uk-coming {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.uk-coming strong {
  color: var(--text);
}

.uk-tool-root {
  min-height: 120px;
}

.uk-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem 1rem;
  margin-top: 0.75rem;
}

.uk-form-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.uk-form-grid input,
.uk-form-grid select {
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.uk-file {
  padding: 0.75rem;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
}

.uk-file--in-panel {
  margin-top: 1rem;
  width: 100%;
  box-sizing: border-box;
}

.uk-format-spec {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--text);
}

.uk-format-detail {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.uk-format-list {
  margin: 0;
  padding-left: 1.2rem;
}

.uk-format-list code {
  font-size: 0.85em;
  background: var(--bg-surface);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.uk-canvas-wrap {
  margin-top: 1rem;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  max-width: 100%;
}

.uk-canvas-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.uk-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0.5rem 0 0;
}

@media (max-width: 640px) {
  .uk-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}