/* ==========================================================================
   prioority.com — Design System & Layout
   Mobile-first, CSS custom properties, no framework.
   ========================================================================== */

:root {
  /* Brand */
  --color-navy-900: #172554;
  --color-navy-800: #1e3a8a;
  --color-navy-700: #1d4ed8;
  --color-accent: #0ea5e9;
  --color-accent-dark: #0284c7;

  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-inset: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-faint: #94a3b8;
  --color-on-navy: #e2e8f0;
  --color-on-navy-muted: #93a5c9;

  /* Feedback */
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-danger: #dc2626;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  /* Radii & shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --container-max: 1280px;
  --transition-fast: 150ms ease;
  --transition-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-alt);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-navy-800);
  background: linear-gradient(180deg, var(--color-navy-800) 0%, var(--color-navy-900) 100%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.navbar-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
  white-space: nowrap;
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-navy-700));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 0.95rem;
  flex-shrink: 0;
}
.brand-domain { color: var(--color-on-navy-muted); font-weight: 500; }

.nav-primary {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex: 1;
  justify-content: flex-end;
}
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}
.nav-links a {
  color: var(--color-on-navy);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-links a:hover { background: rgba(255,255,255,0.08); color: #fff; }

.nav-tools-search {
  display: none;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  padding: 0 var(--space-3);
  height: 36px;
  width: 220px;
  transition: background var(--transition-fast), width var(--transition-fast);
}
.nav-tools-search:focus-within { background: rgba(255,255,255,0.14); width: 260px; }
.nav-tools-search input {
  background: transparent;
  border: 0;
  color: #fff;
  width: 100%;
  height: 100%;
  font-size: 0.85rem;
}
.nav-tools-search input::placeholder { color: var(--color-on-navy-muted); }
.nav-tools-search svg { flex-shrink: 0; color: var(--color-on-navy-muted); }

.lang-select-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
#language-select {
  appearance: none;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  color: #fff;
  padding: var(--space-2) var(--space-6) var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  max-width: 140px;
}
.lang-select-wrap::after {
  content: '';
  position: absolute;
  right: 10px;
  width: 8px; height: 8px;
  border-right: 2px solid var(--color-on-navy-muted);
  border-bottom: 2px solid var(--color-on-navy-muted);
  transform: rotate(45deg);
  pointer-events: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
}

.nav-mobile-panel {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-5) var(--space-5);
  background: var(--color-navy-900);
}
.nav-mobile-panel.open { display: flex; }
.nav-mobile-panel a {
  color: var(--color-on-navy);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.nav-mobile-panel a:hover { background: rgba(255,255,255,0.08); }

@media (min-width: 900px) {
  .nav-links, .nav-tools-search { display: flex; }
  .nav-toggle { display: none; }
  .nav-mobile-panel { display: none !important; }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  background: radial-gradient(ellipse at top, #1e3a8a 0%, #0f172a 65%);
  color: #fff;
  padding: var(--space-8) 0 var(--space-7);
}
.hero-inner { max-width: 720px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(14, 165, 233, 0.15);
  border: 1px solid rgba(14, 165, 233, 0.35);
  color: #7dd3fc;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  margin-bottom: var(--space-4);
}
.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}
.hero p {
  font-size: 1.05rem;
  color: var(--color-on-navy);
  max-width: 56ch;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-top: var(--space-6);
}
.hero-stat strong { display: block; font-size: 1.4rem; font-weight: 700; }
.hero-stat span { font-size: 0.8rem; color: var(--color-on-navy-muted); }

/* --------------------------------------------------------------------------
   Tool cards grid
   -------------------------------------------------------------------------- */
.tools-nav {
  margin-top: calc(var(--space-8) * -1 + var(--space-5));
  padding-bottom: var(--space-6);
}
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 640px) { .tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .tools-grid { grid-template-columns: repeat(4, 1fr); } }

.tool-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.tool-card:hover, .tool-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-navy-700);
}
.tool-card.active { border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(14,165,233,0.15), var(--shadow-lg); }
.tool-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-inset);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-navy-700);
}
.tool-card h3 { font-size: 1rem; font-weight: 600; }
.tool-card p { font-size: 0.85rem; color: var(--color-text-muted); }

/* --------------------------------------------------------------------------
   Layout: main + sidebar
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-block: var(--space-6) var(--space-8);
}
@media (min-width: 960px) {
  .page-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
}

.main-content { display: flex; flex-direction: column; gap: var(--space-6); min-width: 0; }

.content-section {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  scroll-margin-top: 84px;
}
.content-section[hidden] { display: none; }
.section-header { margin-bottom: var(--space-5); }
.section-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-header p { color: var(--color-text-muted); font-size: 0.92rem; margin-top: var(--space-1); }

/* Form controls */
.field-group { display: flex; flex-direction: column; gap: var(--space-2); }
label { font-size: 0.82rem; font-weight: 600; color: var(--color-text-muted); }
input[type="text"], input[type="number"], select {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 0.95rem;
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
  outline: none;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--color-navy-800);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-5);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.btn:hover { background: var(--color-navy-700); }
.btn:active { transform: scale(0.98); }
.btn-secondary { background: var(--color-bg-inset); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-border); }
.btn-icon { width: 20px; height: 20px; }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
@media (min-width: 560px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
@media (min-width: 700px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

/* Result / stat cards */
.result-card {
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-top: var(--space-5);
}
.result-card .result-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.result-card .result-value {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-navy-800);
  margin-top: var(--space-1);
  word-break: break-all;
}
.result-card .result-badge {
  display: inline-block;
  margin-top: var(--space-2);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(14,165,233,0.12);
  color: var(--color-accent-dark);
}

.meta-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin-top: var(--space-4); }
@media (min-width: 560px) { .meta-list { grid-template-columns: repeat(3, 1fr); } }
.meta-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
}
.meta-item .meta-key { font-size: 0.72rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.03em; }
.meta-item .meta-val { font-size: 0.95rem; font-weight: 600; margin-top: 2px; }

.subnet-table { width: 100%; border-collapse: collapse; margin-top: var(--space-4); font-size: 0.9rem; }
.subnet-table th, .subnet-table td { text-align: left; padding: var(--space-3); border-bottom: 1px solid var(--color-border); }
.subnet-table th { color: var(--color-text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
.subnet-table td { font-family: var(--font-mono); }

.helper-text { font-size: 0.82rem; color: var(--color-text-faint); margin-top: var(--space-2); }
.error-text { font-size: 0.85rem; color: var(--color-danger); margin-top: var(--space-2); display: none; }
.error-text.visible { display: block; }

/* --------------------------------------------------------------------------
   News sidebar
   -------------------------------------------------------------------------- */
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.news-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.news-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-inset);
}
.news-card-header h2 { font-size: 1rem; font-weight: 700; }
.news-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); box-shadow: 0 0 0 3px rgba(22,163,74,0.15); }
.news-list { display: flex; flex-direction: column; }
.news-item {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.news-item:last-child { border-bottom: none; }
.news-item time { font-size: 0.72rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.03em; }
.news-item p { font-size: 0.88rem; margin-top: var(--space-1); color: var(--color-text); }
.news-item .news-lang-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  background: rgba(14,165,233,0.1);
  padding: 1px 6px;
  border-radius: 4px;
  margin-right: var(--space-2);
  text-transform: uppercase;
}

.info-card {
  background: var(--color-navy-900);
  color: var(--color-on-navy);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.info-card h3 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: var(--space-2); }
.info-card p { font-size: 0.85rem; color: var(--color-on-navy-muted); }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-navy-900);
  color: var(--color-on-navy);
  margin-top: auto;
}
.footer-top {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-7) var(--space-5) var(--space-6);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 800px) { .footer-top { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer-brand p { color: var(--color-on-navy-muted); font-size: 0.88rem; margin-top: var(--space-2); max-width: 42ch; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-on-navy-muted); margin-bottom: var(--space-3); }
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a { font-size: 0.88rem; color: var(--color-on-navy); }
.footer-col a:hover { color: #fff; }
.footer-link-button {
  font-size: 0.88rem; color: var(--color-on-navy); background: none; border: none;
  padding: 0; text-align: left; cursor: pointer; font-family: inherit;
}
.footer-link-button:hover { color: #fff; }
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.78rem;
  color: var(--color-warning);
  background: rgba(217,119,6,0.12);
  border: 1px solid rgba(217,119,6,0.3);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  margin-top: var(--space-3);
}

.footer-ad {
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
}
.ad-slot {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 90px;
  text-align: center;
}
.ad-slot .ad-label {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-on-navy-muted);
}
.ad-slot .ad-placeholder {
  font-size: 0.85rem;
  color: var(--color-on-navy-muted);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-6);
  width: 100%;
  max-width: 728px;
}

.footer-bottom {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.78rem;
  color: var(--color-on-navy-muted);
}

html, body { height: 100%; }
body { display: flex; flex-direction: column; min-height: 100vh; }
.page-layout, main { flex: 1; }