/* ============================================
   DESIGN TOKENS
   These are the site's core colors, fonts, and spacing values,
   defined once as variables so every page stays consistent.
   Change a color here and it updates everywhere automatically.
   ============================================ */
:root {
  --ink: #1B2430;          /* main text / headings */
  --paper: #FAFAF7;        /* page background */
  --paper-raised: #FFFFFF; /* card backgrounds */
  --amber: #E8A33D;        /* primary accent - global tools */
  --amber-dark: #C6832A;
  --teal: #2F7A6D;         /* Sri Lanka category tag */
  --navy-tag: #33475B;     /* IT/Security category tag */
  --slate: #6B7280;        /* secondary text */
  --line: #E5E1D8;         /* borders / dividers */
  --line-strong: #D6D1C4;

  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 6px;
  --max-width: 1100px;
}

/* ============================================
   RESET & BASE
   Removes browser default spacing inconsistencies
   so the site looks the same across all browsers.
   ============================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  /* Subtle grid-line texture in the background - ties into the
     "precision instrument" concept without being distracting */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
header.site-header {
  background: var(--paper-raised);
  border-bottom: 1px solid var(--line-strong);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 24px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.logo .mark { color: var(--amber); font-family: var(--font-mono); }

.site-search {
  flex: 1;
  max-width: 360px;
  position: relative;
}
.site-search input {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.9rem;
  background: var(--paper);
  color: var(--ink);
}
.site-search input:focus {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}

nav.main-nav {
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}
nav.main-nav a {
  color: var(--slate);
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
nav.main-nav a:hover,
nav.main-nav a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line-strong);
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 20ch;
  margin-bottom: 14px;
}
.hero p {
  color: var(--slate);
  font-size: 1.05rem;
  max-width: 52ch;
  margin-bottom: 28px;
}
.hero-search {
  max-width: 480px;
}
.hero-search input {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
  font-family: var(--font-display);
}
.hero-search input:focus {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ============================================
   CATEGORY SECTIONS + TOOL CARDS
   ============================================ */
.category-section {
  padding: 40px 0;
}
.category-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 12px;
}
.category-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
}
.category-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 3px;
  color: #fff;
  letter-spacing: 0.02em;
}
.tag-sl { background: var(--teal); }
.tag-global { background: var(--amber-dark); background: #C6832A; }
.tag-it { background: var(--navy-tag); }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.tool-card {
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color 0.15s, transform 0.15s;
}
.tool-card:hover,
.tool-card:focus-visible {
  border-color: var(--ink);
  transform: translateY(-2px);
}
.tool-card .icon {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate);
  margin-bottom: 10px;
}
.tool-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.tool-card p {
  font-size: 0.85rem;
  color: var(--slate);
}

/* ============================================
   CALCULATOR PAGE LAYOUT
   ============================================ */
.calc-page {
  padding: 40px 0 64px;
}
.breadcrumb {
  font-size: 0.82rem;
  color: var(--slate);
  margin-bottom: 20px;
}
.breadcrumb a:hover { color: var(--ink); }

.calc-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.calc-subtitle {
  color: var(--slate);
  margin-bottom: 32px;
  max-width: 60ch;
}

.calc-box {
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 40px;
}

.field-group {
  margin-bottom: 18px;
}
.field-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--ink);
}
.field-group input,
.field-group select {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1rem;
  background: var(--paper);
  color: var(--ink);
}
.field-group input:focus,
.field-group select:focus {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.calc-result {
  margin-top: 24px;
  padding: 20px;
  background: var(--paper);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
}
.calc-result .result-label {
  font-size: 0.8rem;
  color: var(--slate);
  margin-bottom: 4px;
}
.calc-result .result-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--teal);
}

.explainer {
  max-width: 68ch;
}
.explainer h2 {
  font-size: 1.2rem;
  margin: 28px 0 10px;
}
.explainer p {
  color: var(--slate);
  margin-bottom: 12px;
}

.rate-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate);
  margin-top: 14px;
}

/* ============================================
   RELATED TOOLS
   ============================================ */
.related-tools {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--line-strong);
}
.related-tools h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

/* ============================================
   FOOTER
   ============================================ */
footer.site-footer {
  border-top: 1px solid var(--line-strong);
  padding: 32px 0;
  margin-top: 48px;
  color: var(--slate);
  font-size: 0.85rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================
   AD SLOT PLACEHOLDERS
   These are empty containers where Monetag ad code will go.
   Left with no visible styling so an unfilled slot doesn't show
   an ugly placeholder box to visitors - it just takes up no space
   until real ad code is pasted inside it.
   ============================================ */
.ad-slot {
  /* intentionally empty - do not add a border/background here,
     or every unfilled ad slot will look broken to visitors */
}

/* ============================================
   RESPONSIVE - mobile screens
   ============================================ */
@media (max-width: 640px) {
  .header-inner { flex-wrap: wrap; }
  .site-search { order: 3; max-width: 100%; }
  nav.main-nav { gap: 14px; font-size: 0.85rem; }
  .field-row { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 32px; }
}