/* ============================================================
   base.css — LayoffCalc design system
   Fonts, variables, reset, layout, nav, hero, shared inputs
   ============================================================ */

/* ---------- Google Fonts ---------- */
/* loaded via <link> in index.html with preconnect */

/* ---------- Design tokens ---------- */
:root {
  --primary:      #1E3A8A;
  --accent:       #3B82F6;
  --bg:           #F8FAFC;
  --success:      #10B981;
  --warning:      #F59E0B;
  --alert:        #EF4444;
  --text:         #0F172A;
  --text-sec:     #64748B;
  --border:       #E2E8F0;
  --white:        #FFFFFF;

  --card-radius:  12px;
  --input-radius: 8px;
  --btn-radius:   6px;

  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:    0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:    0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05);

  --transition:   0.3s ease;
  --max-width:    819px;
  --pad:          24px;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

ul, ol { list-style: none; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ---------- Navigation ---------- */
.site-nav {
  background: var(--primary);
  padding: 0 var(--pad);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav-logo span {
  color: #93C5FD; /* blue-300 */
}

.nav-tagline {
  font-size: 0.75rem;
  color: #CBD5E1;
  font-weight: 400;
  display: none;
}

@media (min-width: 480px) {
  .nav-tagline { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
  color: var(--white);
  padding: 40px var(--pad) 36px;
  text-align: center;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-sub {
  font-size: 1.0625rem;
  color: #BFDBFE;
  max-width: 560px;
  margin: 0 auto 20px;
  line-height: 1.5;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.8125rem;
  color: #E0F2FE;
  font-weight: 500;
}

/* ---------- Shared typography ---------- */
.section-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.section-desc {
  font-size: 0.9375rem;
  color: var(--text-sec);
  margin-bottom: 24px;
}

/* ---------- Shared form elements ---------- */
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  font-size: 16px;          /* 16px prevents iOS zoom */
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--input-radius);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ---------- Range slider ---------- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
  transition: background var(--transition);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent), var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--transition);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent), var(--shadow-sm);
  cursor: pointer;
}

input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.15);
}

/* ---------- Shared buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--btn-radius);
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: #2563EB;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover {
  background: #EFF6FF;
  text-decoration: none;
}

.btn-copy {
  background: var(--primary);
  color: var(--white);
  width: 100%;
  font-size: 1rem;
}
.btn-copy:hover {
  background: #1e40af;
  text-decoration: none;
  transform: translateY(-1px);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--primary);
  color: #CBD5E1;
  padding: 32px var(--pad);
  margin-top: 48px;
  font-size: 0.8125rem;
  line-height: 1.7;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #93C5FD;
  font-size: 0.8125rem;
}

.footer-copyright {
  color: #94A3B8;
  font-size: 0.75rem;
}

/* ---------- Responsive tweaks ---------- */
@media (max-width: 480px) {
  :root { --pad: 16px; }
  .hero { padding: 28px var(--pad) 24px; }
  .btn { height: 52px; }  /* bigger tap target on mobile */
}