/* SnapCalc — Design System & Main Styles */
:root {
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-soft: #DBEAFE;
  --color-accent: #10B981;
  --color-accent-soft: #D1FAE5;
  --color-danger: #EF4444;
  --color-danger-soft: #FEE2E2;
  --color-warning: #F59E0B;
  --color-warning-soft: #FEF3C7;

  --bg: #FFFFFF;
  --bg-alt: #F9FAFB;
  --bg-elevated: #FFFFFF;
  --text: #111827;
  --text-muted: #6B7280;
  --text-inverse: #FFFFFF;
  --border: #E5E7EB;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.1);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --container: 1200px;
  --header-h: 64px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --transition: 180ms ease;
}

[data-theme="dark"] {
  --bg: #0F172A;
  --bg-alt: #1E293B;
  --bg-elevated: #1E293B;
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --border: #334155;
  --shadow: 0 1px 3px rgba(0,0,0,.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.4);
  --color-primary-soft: #1E3A8A;
  --color-accent-soft: #064E3B;
  --color-danger-soft: #7F1D1D;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
/* Ensure [hidden] wins over display:grid / flex utilities */
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3,h4 { line-height: 1.25; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h2 { font-size: clamp(1.35rem, 2.2vw, 1.75rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; color: var(--text-muted); }
ul { padding-left: 1.2rem; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 9999;
  background: var(--color-primary); color: #fff; padding: .5rem 1rem;
}
.skip-link:focus { left: 0; }

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

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 1rem;
}
.logo {
  display: inline-flex; align-items: center; gap: .45rem;
  font-weight: 700; font-size: 1.25rem; color: var(--text);
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo__img { width: 32px; height: 32px; border-radius: 8px; }
.logo__mark {
  display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), #60A5FA);
  color: #fff; font-size: .9rem;
}
.nav { display: flex; align-items: center; gap: .25rem; }
.nav__link {
  display: inline-flex; align-items: center; gap: .25rem;
  padding: .5rem .85rem; border-radius: 999px;
  color: var(--text-muted); font-weight: 500; font-size: .95rem;
  background: transparent; border: 0; cursor: pointer; font-family: inherit;
  text-decoration: none;
}
.nav__link:hover, .nav__link.is-active { color: var(--color-primary); background: var(--color-primary-soft); text-decoration: none; }
.nav__dropdown { position: relative; }
.nav__dropdown-menu {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 220px;
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: .5rem; display: none; z-index: 50;
}
.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown:focus-within .nav__dropdown-menu,
.nav__dropdown.is-open .nav__dropdown-menu { display: block; }
.nav__dropdown-menu a {
  display: block; padding: .55rem .75rem; border-radius: var(--radius-sm);
  color: var(--text); text-decoration: none; font-size: .92rem;
}
.nav__dropdown-menu a:hover { background: var(--bg-alt); }
.header-actions { display: flex; align-items: center; gap: .5rem; }
.theme-toggle, .menu-toggle {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-elevated);
  color: var(--text); cursor: pointer; display: grid; place-items: center;
}
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.menu-toggle span {
  display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .7rem 1.25rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem; font-family: inherit;
  border: 1px solid transparent; cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none; line-height: 1.2;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-hover); box-shadow: 0 4px 14px rgba(37,99,235,.35); }
.btn--accent { background: var(--color-accent); color: #fff; }
.btn--outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn--outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--ghost { background: transparent; color: var(--text-muted); }
.btn--sm { padding: .45rem .85rem; font-size: .85rem; }
.btn--block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* Hero home */
.home-hero {
  position: relative;
  padding: 4rem 0 3.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(37,99,235,.12), transparent 50%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(16,185,129,.1), transparent 45%),
    var(--bg);
  overflow: hidden;
}
.home-hero__grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items: center;
}
.home-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -.03em; margin-bottom: .75rem; color: var(--text);
}
.home-hero__lead {
  font-size: 1.15rem; max-width: 36ch; margin-bottom: 1.5rem;
}
.home-hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.5rem; }
.home-hero__stats {
  display: flex; gap: 1.5rem; flex-wrap: wrap;
}
.home-hero__stat strong { display: block; font-size: 1.4rem; color: var(--text); font-variant-numeric: tabular-nums; }
.home-hero__stat span { font-size: .85rem; color: var(--text-muted); }
.hero-visual {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 1.25rem;
  animation: floatIn .7s ease both;
}
.hero-visual__demo {
  display: grid; gap: .75rem;
}
.demo-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: .85rem 1rem; border-radius: var(--radius-sm); background: var(--bg-alt);
}
.demo-row--result {
  background: linear-gradient(135deg, var(--color-primary), #3B82F6);
  color: #fff;
}
.demo-row--result span, .demo-row--result strong { color: #fff; }
@keyframes floatIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

/* Sections */
.section { padding: 3.5rem 0; }
.section--alt { background: var(--bg-alt); }
.section-header {
  display: flex; justify-content: space-between; align-items: end;
  gap: 1rem; margin-bottom: 1.75rem; flex-wrap: wrap;
}
.section-header p { margin: 0; max-width: 50ch; }

/* Tool grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.tool-grid--compact { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.tool-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--border));
}
.tool-card__link {
  display: flex; gap: 1rem; padding: 1.15rem; color: inherit; text-decoration: none; height: 100%;
}
.tool-card__link:hover { text-decoration: none; }
.tool-card__icon {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--cat-color, var(--color-primary)) 15%, transparent);
  color: var(--cat-color, var(--color-primary));
  font-weight: 700; font-size: .8rem; font-family: var(--font-mono);
}
.tool-card__title { margin: 0 0 .35rem; font-size: 1.05rem; color: var(--text); }
.tool-card__desc {
  margin: 0 0 .6rem; font-size: .88rem;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.tool-card__cat {
  font-size: .75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; color: var(--color-primary);
}

.category-block { margin-bottom: 2.5rem; scroll-margin-top: calc(var(--header-h) + 1rem); }
.category-block__title {
  display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem;
}
.category-dot {
  width: 10px; height: 10px; border-radius: 50%;
}

/* Ads */
.ad-slot {
  display: flex; justify-content: center; align-items: center;
  margin: 1rem auto; max-width: var(--container); padding: 0 1rem;
  min-height: 50px;
}
.ad-placeholder {
  width: 100%; max-width: 728px; min-height: 90px;
  display: grid; place-items: center;
  background: repeating-linear-gradient(-45deg, var(--bg-alt), var(--bg-alt) 8px, var(--border) 8px, var(--border) 9px);
  border: 1px dashed var(--border); border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em;
}
.ad-placeholder--tall { min-height: 250px; max-width: 300px; }
.ad-sidebar { padding: 0; margin: 0 0 1.25rem; }
.sticky-ad { position: sticky; top: calc(var(--header-h) + 1rem); }

/* Footer */
.site-footer {
  background: var(--bg-alt); border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem; margin-top: 2rem;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; margin-bottom: 2rem;
}
.footer-brand p { max-width: 28ch; }
.footer-col h3 { font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: .45rem; }
.footer-col a { color: var(--text); text-decoration: none; font-size: .95rem; }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 1.25rem;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.footer-bottom p { margin: 0; font-size: .85rem; }
.footer-disclaimer { max-width: 50ch; }

/* Cookie */
.cookie-banner {
  position: fixed; bottom: 1rem; left: 1rem; right: 1rem; z-index: 200;
  max-width: 420px; margin-inline: auto;
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 1rem 1.15rem; display: flex; flex-direction: column; gap: .75rem;
}
.cookie-banner p { margin: 0; font-size: .9rem; }
.cookie-banner__actions { display: flex; gap: .5rem; }

/* Forms shared */
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block; font-weight: 600; font-size: .9rem; margin-bottom: .4rem; color: var(--text);
}
.form-hint { font-size: .8rem; color: var(--text-muted); margin-top: .3rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
input[type="text"], input[type="email"], input[type="number"], input[type="date"],
input[type="password"], input[type="url"], select, textarea {
  width: 100%; padding: .7rem .85rem;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text); font: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
}
.unit-toggle {
  display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; margin-left: .5rem;
}
.unit-toggle button {
  border: 0; background: transparent; padding: .25rem .65rem; font: inherit; font-size: .8rem;
  font-weight: 600; color: var(--text-muted); cursor: pointer;
}
.unit-toggle button.is-active { background: var(--color-primary); color: #fff; }

.search-box {
  display: flex; gap: .5rem; max-width: 480px;
}
.search-box input { flex: 1; }

/* Misc pages */
.page-hero { padding: 2.5rem 0 1.5rem; }
.page-hero h1 { margin-bottom: .5rem; }
.alert {
  padding: .85rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem;
}
.alert--success { background: var(--color-accent-soft); color: #065F46; }
.alert--error { background: var(--color-danger-soft); color: #991B1B; }
[data-theme="dark"] .alert--success { color: #6EE7B7; }
[data-theme="dark"] .alert--error { color: #FCA5A5; }

.affiliate-cta {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.25rem; margin: 1.5rem 0; background: var(--bg-alt);
  display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem;
}
.affiliate-cta__label {
  margin: 0; font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .05em; color: var(--text-muted); width: 100%;
}
.affiliate-cta__disclaimer { margin: 0; font-size: .75rem; width: 100%; }

.subscribe-box {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--bg-elevated), var(--bg-alt));
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.subscribe-box h2 { margin-bottom: .35rem; }
.subscribe-box p { margin-bottom: .9rem; }
.subscribe-box--compact h2 { font-size: 1.2rem; }
.subscribe-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .65rem;
  align-items: center;
}
.subscribe-form input[type="email"] {
  margin: 0;
}
.subscribe-form__msg {
  margin-top: .65rem;
  font-size: .88rem;
  min-height: 1.2rem;
}
.subscribe-form__msg.is-success { color: #065f46; }
.subscribe-form__msg.is-error { color: #991b1b; }
[data-theme="dark"] .subscribe-form__msg.is-success { color: #6ee7b7; }
[data-theme="dark"] .subscribe-form__msg.is-error { color: #fca5a5; }

/* Print */
@media print {
  .site-header, .site-footer, .ad-slot, .cookie-banner, .calculator-sidebar,
  .theme-toggle, .menu-toggle, .share-bar, .affiliate-cta { display: none !important; }
  .calculator-layout { display: block !important; }
  .calc-results { display: block !important; box-shadow: none; border: 1px solid #ccc; }
  body { background: #fff; color: #000; }
}