/* ClearQuarter shared design system — plain CSS, no build step, no external fonts. */

:root {
  /* Tokens */
  --color-bg: #faf9f6;
  --color-surface: #ffffff;
  --color-ink: #16181d;
  --color-ink-muted: #5b6675;
  --color-border: #e4e1da;
  --color-accent: #1c4ed8;
  --color-accent-deep: #16326b;
  --color-warn-bg: #fff8e6;
  --color-warn-border: #f0d78c;
  --color-danger: #b3261e;

  --radius: 10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(22, 24, 29, 0.05), 0 1px 1px rgba(22, 24, 29, 0.03);
  --shadow-md: 0 8px 24px rgba(22, 24, 29, 0.08), 0 2px 6px rgba(22, 24, 29, 0.05);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --content-width: 700px;

  --transition-fast: 140ms ease;
  --transition-base: 220ms cubic-bezier(0.2, 0.7, 0.3, 1);

  /* Aliases kept for the calculator's inline result styles (JS-generated markup), unchanged. */
  --ink: var(--color-ink);
  --muted: var(--color-ink-muted);
  --line: var(--color-border);
  --accent: var(--color-accent);
  --bg: var(--color-bg);
  --card: var(--color-surface);
  --warn-bg: var(--color-warn-bg);
  --warn-line: var(--color-warn-border);
}

/* Base */
* { box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  margin: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--color-accent); }
a:hover { color: var(--color-accent-deep); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Skip link — was referenced across every page but never had any CSS; this makes it actually work. */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}
.skip-link:focus {
  left: 0;
}

/* Layout */
main#main,
.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-6) 20px var(--space-8);
}

.hero {
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

/* Typography */
h1 {
  font-size: clamp(1.7rem, 1.25rem + 2vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 var(--space-3);
}

h2 {
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.45rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin: var(--space-7) 0 var(--space-3);
}

h1 + h2, .hero + h2 { margin-top: var(--space-6); }

p { margin: 0 0 var(--space-4); }

p.lead {
  font-size: 1.1rem;
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.small-print {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}

ul, ol { padding-left: 22px; margin: 0 0 var(--space-4); }
.steps li { margin-bottom: var(--space-3); }
.steps strong { color: var(--color-ink); }

/* Navigation */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header nav {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--color-ink);
  margin-right: auto;
}
.brand span { color: var(--color-accent); }

.navlink {
  text-decoration: none;
  color: var(--color-ink-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 2px 1px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.navlink:hover { color: var(--color-ink); }
.navlink[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Buttons — shared visual language for anchor CTAs (.button) and real <button> elements (calculator). */
.button, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
  padding: 12px 22px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  min-height: 44px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
}
button { width: 100%; }

.button:hover, button:hover:not(:disabled) {
  background: var(--color-accent-deep);
  border-color: var(--color-accent-deep);
}
.button:active, button:active:not(:disabled) {
  transform: translateY(1px);
}
.button.secondary, button.secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.button.secondary:hover, button.secondary:hover:not(:disabled) {
  background: rgba(28, 78, 216, 0.07);
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards & notices */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin-top: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}
.card:hover { box-shadow: var(--shadow-md); }

.notice {
  background: #f3f1ec;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin-top: var(--space-5);
  font-size: 0.92rem;
  color: var(--color-ink-muted);
}

.cta-card {
  background: #eef4ff;
  border: 1px solid #c9dcfb;
  border-radius: var(--radius);
  padding: var(--space-5);
  margin-top: var(--space-5);
}
.cta-card p { margin: var(--space-2) 0 var(--space-4); }

/* Missing-asset-safe frame: degrades gracefully if the preview image isn't present yet. */
.preview-card img {
  display: block;
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #f4f2ec;
  min-height: 200px;
}

/* Forms (calculator) */
label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-1);
  font-size: 0.95rem;
  color: var(--color-ink);
}
.help {
  color: var(--color-ink-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-2);
}
.row { margin-bottom: var(--space-1); }

input[type="number"], select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-ink);
  margin-bottom: var(--space-4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input[type="number"]:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(28, 78, 216, 0.15);
}

.error-text {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-top: -10px;
  margin-bottom: var(--space-3);
}

.privacy {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  background: #f1f5f9;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: var(--space-3);
}

/* Calculator result states */
.result-number {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  font-weight: 700;
  margin: 4px 0;
  color: var(--color-ink);
}
.result-label {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.result-sublabel {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 2px;
}
.result-block {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.result-block:last-child { border-bottom: none; }

.section-divider {
  margin: var(--space-7) 0 var(--space-2);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-ink);
}

.warn {
  background: var(--color-warn-bg);
  border: 1px solid var(--color-warn-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 0.88rem;
  margin-top: var(--space-3);
}
.limits ul { padding-left: 20px; margin-top: var(--space-2); }

details {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}
summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 600;
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
}

.hidden { display: none; }

/* Tables (product pricing table) */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  font-size: 0.95rem;
}
table tr { border-bottom: 1px solid var(--color-border); }
table tr:last-child { border-bottom: none; }
th[scope="row"], table td {
  text-align: left;
  padding: 10px 12px 10px 0;
  vertical-align: top;
}
th[scope="row"] {
  color: var(--color-ink-muted);
  font-weight: 600;
  width: 38%;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-8);
  padding: var(--space-6) 20px var(--space-7);
  background: var(--color-surface);
}
.footer-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}
.footer-inner ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: var(--space-3) 0;
}
.footer-inner a { color: var(--color-ink-muted); }
.footer-inner a:hover { color: var(--color-accent); text-decoration: underline; }

/* Responsive */
@media (max-width: 599px) {
  .site-header nav { padding: 12px 16px; }
  main#main, .wrap { padding-left: 16px; padding-right: 16px; }
  .card { padding: var(--space-4); }
  th[scope="row"] { width: 46%; }
}

/* Motion — tasteful, fast, and fully disabled under reduced motion. */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero,
  main#main > .card,
  main#main > .notice {
    animation: fadeInUp 0.5s ease both;
  }
  #screen-intro:not(.hidden),
  #screen-inputs:not(.hidden),
  #screen-results:not(.hidden) {
    animation: fadeIn 0.35s ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}