/* ==========================================================================
   Pizza Dough Guide – Design System
   Mobile-first, no framework, CSS custom properties for light/dark theming.
   ========================================================================== */

:root {
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --color-bg: #FFFBF6;
  --color-bg-alt: #FDF3E7;
  --color-surface: #FFFFFF;
  --color-text: #2B211B;
  --color-text-muted: #6B5D53;
  --color-border: #EBDFD2;

  --color-primary: #C1440E;
  --color-primary-dark: #9A350A;
  --color-primary-contrast: #FFFFFF;
  --color-accent: #6B7F3B;
  --color-accent-contrast: #FFFFFF;

  --color-notice-bg: #FFF3E0;
  --color-notice-border: #E8B672;
  --color-notice-text: #6B4A16;
  --color-warning-bg: #FDECEC;
  --color-warning-border: #E39A9A;
  --color-warning-text: #7A2323;
  --color-success-bg: #EEF3E1;
  --color-success-border: #B7C98F;
  --color-success-text: #3E4E1E;

  --color-ad-bg: #F4EEE4;
  --color-ad-border: #D8CBB8;
  --color-ad-text: #9A8C7A;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 1px 3px rgba(43, 33, 27, 0.08);
  --shadow-md: 0 6px 20px rgba(43, 33, 27, 0.10);

  --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: 4.5rem;

  --container-max: 1120px;
  --container-narrow: 780px;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1C1712;
    --color-bg-alt: #241D16;
    --color-surface: #292019;
    --color-text: #F3EAE0;
    --color-text-muted: #C2B2A2;
    --color-border: #3B3025;

    --color-primary: #FF7A45;
    --color-primary-dark: #E5602C;
    --color-primary-contrast: #1C1712;
    --color-accent: #9CB36B;
    --color-accent-contrast: #1C1712;

    --color-notice-bg: #332711;
    --color-notice-border: #6B4E1E;
    --color-notice-text: #F0D6A3;
    --color-warning-bg: #34191A;
    --color-warning-border: #7A3636;
    --color-warning-text: #F3C4C4;
    --color-success-bg: #202A15;
    --color-success-border: #4C5E2C;
    --color-success-text: #D3E3B4;

    --color-ad-bg: #241D16;
    --color-ad-border: #3B3025;
    --color-ad-text: #8A7C6C;

    color-scheme: dark;
  }
}

/* Manual theme override (kept for future opt-in toggle; unused by default) */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  font-weight: 600;
  color: var(--color-text);
}
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); margin-top: var(--space-7); }
h3 { font-size: 1.25rem; margin-top: var(--space-5); }
p { margin: 0 0 var(--space-4); color: var(--color-text); }
a { color: var(--color-primary); text-decoration: underline; text-decoration-thickness: 1px; }
a:hover { color: var(--color-primary-dark); }

ul, ol { padding-left: 1.25rem; }
li { margin-bottom: var(--space-2); }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.container--narrow { max-width: var(--container-narrow); }

/* Skip link for keyboard/screen-reader users */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  padding: var(--space-3) var(--space-4);
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Header / Navigation ---------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 40;
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}
.brand:hover { color: var(--color-primary); }
.brand__mark { width: 34px; height: 34px; flex-shrink: 0; }

.main-nav { display: none; }
.main-nav ul {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}
.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--color-primary); }

.lang-switch {
  display: flex;
  gap: var(--space-1);
  font-size: 0.85rem;
}
.lang-switch a {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
}
.lang-switch a[aria-current="true"] {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) 0 var(--space-5);
  border-top: 1px solid var(--color-border);
}
.mobile-nav.is-open { display: flex; }
.mobile-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.05rem;
  padding: var(--space-2) 0;
}

@media (min-width: 860px) {
  .main-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none !important; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 52px;
  padding: 0 var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.05s ease, background-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}
.btn--primary:hover { background: var(--color-primary-dark); }
.btn--secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--block { width: 100%; }

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-7) 0 var(--space-6);
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}
.hero__grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
.hero__kicker {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  margin-bottom: var(--space-3);
}
.hero__lede { font-size: 1.1rem; color: var(--color-text-muted); max-width: 46ch; }
.hero__art { justify-self: center; width: min(320px, 80%); }

@media (min-width: 860px) {
  .hero__grid { grid-template-columns: 1.1fr 0.9fr; }
}

/* ---------- Cards / Sections ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}
.section { padding: var(--space-7) 0; }
.section--alt { background: var(--color-bg-alt); }

.info-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .info-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .info-grid--2 { grid-template-columns: repeat(2, 1fr); }
}
.info-card h3 { margin-top: 0; display: flex; align-items: center; gap: var(--space-2); }
.info-card__icon { width: 28px; height: 28px; color: var(--color-primary); flex-shrink: 0; }

/* ---------- Calculator ---------- */
.calculator {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
}
@media (min-width: 700px) { .calculator { padding: var(--space-6); } }

.form-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 620px) {
  .form-grid--2 { grid-template-columns: 1fr 1fr; }
}

.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field[hidden] { display: none; }
.field label { font-weight: 600; font-size: 0.92rem; }
.field .hint { font-size: 0.82rem; color: var(--color-text-muted); }

.field input[type="number"],
.field select {
  min-height: 52px;
  padding: 0 var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
}
.field input[type="number"]:focus,
.field select:focus { border-color: var(--color-primary); }

/* Selects keep their native OS widget by default, which some browsers
   (notably Safari) don't size the same way as text inputs even with an
   identical min-height. Taking over the box model fully keeps every
   field the same height everywhere. */
.field select {
  height: 52px;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: var(--space-7);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B5D53' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
}
@media (prefers-color-scheme: dark) {
  .field select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23C2B2A2' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  }
}

.field--checkbox {
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
}
.field--checkbox input { width: 24px; height: 24px; accent-color: var(--color-primary); }

.range-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.calculator__actions { margin-top: var(--space-5); display: flex; gap: var(--space-3); flex-wrap: wrap; }

.results {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px dashed var(--color-border);
}
.results[hidden] { display: none; }

.result-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 620px) { .result-grid { grid-template-columns: repeat(4, 1fr); } }

.result-tile {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}
.result-tile__value {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
}
.result-tile__label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.timeline { margin-top: var(--space-5); }
.timeline ol { list-style: none; padding: 0; display: grid; gap: var(--space-2); }
.timeline li {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}
.timeline li strong { color: var(--color-text); }

/* ---------- Notices ---------- */
.notice {
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: var(--space-4) 0;
  border: 1.5px solid var(--color-notice-border);
  background: var(--color-notice-bg);
  color: var(--color-notice-text);
  font-size: 0.94rem;
}
.notice--warning { border-color: var(--color-warning-border); background: var(--color-warning-bg); color: var(--color-warning-text); }
.notice--success { border-color: var(--color-success-border); background: var(--color-success-bg); color: var(--color-success-text); }
.notice p:last-child { margin-bottom: 0; }
.notice[hidden] { display: none; }

/* ---------- FAQ / Accordion ---------- */
.accordion { border-top: 1px solid var(--color-border); }
.accordion-item { border-bottom: 1px solid var(--color-border); }
.accordion-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-4) var(--space-2);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-primary);
  flex-shrink: 0;
}
.accordion-item[open] summary::after { content: "\2212"; }
.accordion-item .accordion-body { padding: 0 var(--space-2) var(--space-4); color: var(--color-text-muted); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: var(--space-4) 0 0;
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; gap: var(--space-1); }
.breadcrumbs li:not(:last-child)::after { content: "\203A"; margin: 0 var(--space-2); }
.breadcrumbs a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); }

/* ---------- Ad slots (placeholders — see assets/js/ads.js) ---------- */
.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 100px;
  margin: var(--space-6) auto;
  border: 1px dashed var(--color-ad-border);
  background: var(--color-ad-bg);
  color: var(--color-ad-text);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ad-slot__label { font-weight: 700; }
.ad-slot__id { font-family: monospace; letter-spacing: 0; text-transform: none; opacity: 0.8; }
.ad-slot--leaderboard { max-width: 970px; min-height: 90px; }
.ad-slot--incontent { max-width: 728px; min-height: 90px; }
.ad-slot--sidebar { min-height: 600px; width: 300px; }
.ad-slot--footer { max-width: 970px; min-height: 90px; }
.ad-slot--sticky-mobile {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  margin: 0;
  height: 52px;
  min-height: 52px;
  border-radius: 0;
  border-width: 1px 0 0;
}
.ad-slot--sticky-mobile .ad-slot__close {
  position: absolute;
  top: 2px; right: 6px;
  background: none;
  border: none;
  color: var(--color-ad-text);
  font-size: 1rem;
  padding: var(--space-1);
  cursor: pointer;
}
@media (min-width: 860px) {
  .ad-slot--sticky-mobile { display: none; }
}

.layout-with-sidebar {
  display: grid;
  gap: var(--space-6);
}
@media (min-width: 980px) {
  .layout-with-sidebar { grid-template-columns: 1fr 300px; align-items: start; }
  .layout-with-sidebar aside { position: sticky; top: 90px; }
}

/* ---------- Quick nav (in-page anchor pills, mobile-friendly) ---------- */
.quick-nav {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding: var(--space-2) 0 var(--space-2);
  margin-bottom: var(--space-4);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.quick-nav::-webkit-scrollbar { display: none; }
.quick-nav a {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
}
.quick-nav a:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---------- CTA box (cross-links between calculator and guide pages) ---------- */
.cta-box {
  background: var(--color-bg-alt);
  border: 1.5px dashed var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
}
.cta-box p { margin-bottom: var(--space-4); }
.cta-box p:last-of-type { margin-bottom: var(--space-4); }

/* ---------- Range badge (e.g. hydration bands) ---------- */
.range-badge {
  display: inline-block;
  background: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

/* ---------- Fact list (pizza style cards: origin, hydration, fermentation, bake) ---------- */
.fact-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-3);
  font-size: 0.9rem;
  margin: var(--space-3) 0 0;
}
.fact-list dt { color: var(--color-text-muted); font-weight: 600; }
.fact-list dd { margin: 0; }

/* ---------- Troubleshooting (problem -> cause -> fix) ---------- */
.troubleshoot-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
}
.troubleshoot-item__problem {
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-primary);
}
.troubleshoot-item dl { margin: 0; }
.troubleshoot-item dt {
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}
.troubleshoot-item dd { margin: var(--space-1) 0 0; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 0 var(--space-6);
  margin-top: var(--space-7);
}
.footer-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}
.footer-grid h4 { font-size: 0.95rem; margin-bottom: var(--space-3); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid a { color: var(--color-text-muted); text-decoration: none; }
.footer-grid a:hover { color: var(--color-primary); }
.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.stack { display: flex; flex-direction: column; gap: var(--space-4); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}