/**
 * ByCat News Digital — Site styles
 * Design system: Forest / Paper / Terracotta / Charcoal
 * Mobile-first, responsive, accessibility-friendly
 */

/* ========== CSS Custom Properties (Design Tokens) ========== */
:root {
  /* Brand palette */
  --color-forest: #1a3c34;
  --color-forest-light: #2d5a4e;
  --color-forest-muted: #3d6b5c;
  --color-paper: #f7f4ef;
  --color-paper-warm: #efeae3;
  --color-terracotta: #b85c38;
  --color-terracotta-hover: #9a4d2e;
  --color-charcoal: #2d2a26;
  --color-charcoal-muted: #4a4642;
  --color-ink: #1f1d1b;
  --color-slate: #6b6560;
  --color-border: #ddd8d0;
  --color-white: #ffffff;

  /* Typography */
  --font-heading: "Georgia", "Times New Roman", serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", monospace;

  --text-h1: 2.25rem;
  --text-h2: 1.75rem;
  --text-h3: 1.375rem;
  --text-h4: 1.125rem;
  --text-h5: 1rem;
  --text-h6: 0.875rem;
  --text-body: 1rem;
  --text-caption: 0.875rem;
  --text-small: 0.8125rem;

  --line-tight: 1.25;
  --line-body: 1.6;
  --line-loose: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --container-max: 75rem;
  --header-height: 4rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-card: 0 2px 8px rgba(45, 42, 38, 0.06);
  --shadow-sticky: 0 2px 12px rgba(45, 42, 38, 0.08);

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--line-body);
  color: var(--color-charcoal);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-forest); text-decoration: none; }
a:hover { color: var(--color-terracotta); text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--color-terracotta); outline-offset: 2px; }
button:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--color-terracotta); outline-offset: 2px;
}

/* ========== Typography ========== */
.h1, h1 { font-family: var(--font-heading); font-size: clamp(1.75rem, 4vw, var(--text-h1)); line-height: var(--line-tight); color: var(--color-ink); font-weight: 700; margin: 0 0 var(--space-4); }
.h2, h2 { font-family: var(--font-heading); font-size: var(--text-h2); line-height: var(--line-tight); color: var(--color-ink); font-weight: 600; margin: 0 0 var(--space-3); }
.h3, h3 { font-family: var(--font-heading); font-size: var(--text-h3); line-height: var(--line-tight); color: var(--color-ink); font-weight: 600; margin: 0 0 var(--space-2); }
.h4, h4 { font-size: var(--text-h4); font-weight: 600; margin: 0 0 var(--space-2); color: var(--color-charcoal); }
.h5, h5 { font-size: var(--text-h5); font-weight: 600; margin: 0 0 var(--space-2); }
.h6, h6 { font-size: var(--text-h6); font-weight: 600; margin: 0 0 var(--space-1); text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-slate); }
p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }
.text-caption { font-size: var(--text-caption); color: var(--color-slate); }
.text-small { font-size: var(--text-small); color: var(--color-slate); }
.text-body { font-size: var(--text-body); line-height: var(--line-body); }

/* ========== Layout ========== */
.container { width: 100%; max-width: var(--container-max); margin-left: auto; margin-right: auto; padding-left: var(--space-4); padding-right: var(--space-4); }
@media (min-width: 48rem) { .container { padding-left: var(--space-6); padding-right: var(--space-6); } }
@media (min-width: 64rem) { .container { padding-left: var(--space-8); padding-right: var(--space-8); } }

.section { padding-top: var(--space-12); padding-bottom: var(--space-12); }
@media (min-width: 48rem) { .section { padding-top: var(--space-16); padding-bottom: var(--space-16); } }
.section--alt { background-color: var(--color-paper-warm); }
.section--dark { background-color: var(--color-forest); color: var(--color-paper); }
.section--dark a { color: var(--color-paper); }
.section--dark .h2, .section--dark h2 { color: var(--color-paper); }

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 0 0 rgba(0,0,0,0);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}
.site-header.is-scrolled {
  box-shadow: var(--shadow-sticky);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-height); }
.site-logo { font-family: var(--font-heading); font-size: 1.25rem; font-weight: 700; color: var(--color-forest); }
.site-logo:hover { color: var(--color-forest-light); text-decoration: none; }
.site-nav { display: none; }
@media (min-width: 48rem) { .site-nav { display: flex; align-items: center; gap: var(--space-6); } }
.site-nav a { font-size: var(--text-caption); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 500; }
.site-nav a:hover { text-decoration: none; color: var(--color-terracotta); }
.header-search { display: none; }
@media (min-width: 48rem) { .header-search { display: flex; align-items: center; } }
.header-search input { width: 10rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--text-caption); }
.header-search input::placeholder { color: var(--color-slate); }
.btn-menu { display: flex; align-items: center; justify-content: center; width: 2.5rem; height: 2.5rem; padding: 0; border: none; background: none; cursor: pointer; color: var(--color-forest); }
@media (min-width: 48rem) { .btn-menu { display: none; } }
.btn-menu:hover, .btn-menu:focus-visible { color: var(--color-terracotta); }
.btn-menu[aria-expanded="true"] .icon-menu { display: none; }
.btn-menu[aria-expanded="true"] .icon-close { display: block; }
.btn-menu .icon-close { display: none; }

/* Mobile menu */
.mobile-menu { position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0; background: var(--color-paper); z-index: 99; padding: var(--space-6); overflow-y: auto; transform: translateX(-100%); visibility: hidden; transition: transform var(--duration-normal) var(--ease-out), visibility var(--duration-normal); }
.mobile-menu.is-open { transform: translateX(0); visibility: visible; }
.mobile-menu a { display: block; padding: var(--space-3) 0; font-weight: 500; border-bottom: 1px solid var(--color-border); }
.mobile-menu a:hover { text-decoration: none; color: var(--color-terracotta); }

/* ========== Buttons ========== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: var(--space-3) var(--space-5); font-size: var(--text-caption); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; border-radius: var(--radius-md); border: none; cursor: pointer; transition: background-color var(--duration-fast), color var(--duration-fast), transform var(--duration-fast); }
.btn:hover { text-decoration: none; }
.btn:focus-visible { outline: 2px solid var(--color-charcoal); outline-offset: 2px; }
.btn--primary { background-color: var(--color-terracotta); color: var(--color-white); }
.btn--primary:hover { background-color: var(--color-terracotta-hover); color: var(--color-white); }
.btn--secondary { background-color: var(--color-forest); color: var(--color-white); }
.btn--secondary:hover { background-color: var(--color-forest-light); color: var(--color-white); }
.btn--outline { background: transparent; color: var(--color-forest); border: 2px solid var(--color-forest); }
.btn--outline:hover { background: var(--color-forest); color: var(--color-white); }

/* ========== Cards ========== */
.card { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; transition: box-shadow var(--duration-normal), transform var(--duration-normal); }
.card:hover { box-shadow: 0 8px 24px rgba(45, 42, 38, 0.1); }
.card__media { aspect-ratio: 16/9; background: var(--color-paper-warm); overflow: hidden; }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: var(--space-4); }
.card__title { font-family: var(--font-heading); font-size: var(--text-h4); margin: 0 0 var(--space-2); line-height: var(--line-tight); }
.card__title a { color: var(--color-ink); }
.card__title a:hover { color: var(--color-terracotta); text-decoration: none; }
.card__meta { font-size: var(--text-caption); color: var(--color-slate); margin-bottom: var(--space-2); }
.card__excerpt { font-size: var(--text-caption); line-height: var(--line-loose); color: var(--color-charcoal-muted); }

.card--compact .card__body { padding: var(--space-3); }
.card--compact .card__title { font-size: var(--text-h5); }
.card--horizontal { display: grid; grid-template-columns: 1fr 1.2fr; }
@media (max-width: 35rem) { .card--horizontal { grid-template-columns: 1fr; } }
.card--horizontal .card__media { aspect-ratio: 4/3; }

/* ========== Badges & Chips ========== */
.badge { display: inline-block; padding: var(--space-1) var(--space-2); font-size: var(--text-small); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; border-radius: var(--radius-sm); }
.badge--category { background: var(--color-forest); color: var(--color-white); }
.badge--tag { background: var(--color-paper-warm); color: var(--color-charcoal); border: 1px solid var(--color-border); }
.chip { display: inline-flex; align-items: center; gap: var(--space-1); padding: var(--space-2) var(--space-3); font-size: var(--text-caption); border-radius: 999px; background: var(--color-paper-warm); color: var(--color-charcoal); }
.chip:hover { background: var(--color-border); text-decoration: none; color: var(--color-charcoal); }

/* ========== Grids ========== */
.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: 1fr; }
@media (min-width: 36rem) { .grid--2 { grid-template-columns: repeat(2, 1fr); } }
.grid--3 { grid-template-columns: 1fr; }
@media (min-width: 36rem) { .grid--3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .grid--3 { grid-template-columns: repeat(3, 1fr); } }
.grid--4 { grid-template-columns: 1fr; }
@media (min-width: 30rem) { .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 48rem) { .grid--4 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 64rem) { .grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* ========== Hero ========== */
.hero { padding-top: var(--space-10); padding-bottom: var(--space-12); text-align: center; background: linear-gradient(180deg, var(--color-paper-warm) 0%, var(--color-paper) 100%); }
@media (min-width: 48rem) { .hero { padding-top: var(--space-16); padding-bottom: var(--space-20); } }
.hero__title { margin-bottom: var(--space-4); max-width: 28rem; margin-left: auto; margin-right: auto; }
.hero__desc { font-size: 1.125rem; line-height: var(--line-loose); color: var(--color-charcoal-muted); max-width: 36rem; margin: 0 auto var(--space-6); }
.hero__cta { margin-top: var(--space-6); }

/* ========== Section titles ========== */
.section-title { margin-bottom: var(--space-8); }
.section-title__label { font-size: var(--text-caption); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-terracotta); font-weight: 600; margin-bottom: var(--space-2); }
.section-title .h2 { margin-bottom: var(--space-2); }

/* ========== Accordion (FAQ) ========== */
.accordion { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.accordion__item { border-bottom: 1px solid var(--color-border); }
.accordion__item:last-child { border-bottom: none; }
.accordion__trigger { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-4); text-align: left; font-family: var(--font-heading); font-size: var(--text-h5); font-weight: 600; color: var(--color-ink); background: var(--color-white); border: none; cursor: pointer; transition: background var(--duration-fast); }
.accordion__trigger:hover { background: var(--color-paper); }
.accordion__trigger:focus-visible { outline: 2px solid var(--color-terracotta); outline-offset: -2px; }
.accordion__trigger[aria-expanded="true"] { background: var(--color-paper-warm); }
.accordion__trigger .icon-chevron { flex-shrink: 0; transition: transform var(--duration-normal); }
.accordion__trigger[aria-expanded="true"] .icon-chevron { transform: rotate(180deg); }
.accordion__panel { padding: 0 var(--space-4) var(--space-4); }
.accordion__panel[hidden] { display: none; }
.accordion__content { padding-top: 0; font-size: var(--text-body); line-height: var(--line-loose); color: var(--color-charcoal-muted); }

/* ========== Footer ========== */
.site-footer { background: var(--color-forest); color: var(--color-paper); padding-top: var(--space-12); padding-bottom: var(--space-8); }
.site-footer a { color: var(--color-paper); }
.site-footer a:hover { color: var(--color-paper-warm); text-decoration: none; }
.footer__grid { display: grid; gap: var(--space-8); margin-bottom: var(--space-8); }
@media (min-width: 36rem) { .footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 48rem) { .footer__grid { grid-template-columns: repeat(4, 1fr); } }
.footer__col h4 { font-size: var(--text-caption); text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-paper-warm); margin: 0 0 var(--space-3); }
.footer__col ul { list-style: none; padding: 0; margin: 0; }
.footer__col li { margin-bottom: var(--space-2); }
.footer__bottom { padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.15); font-size: var(--text-caption); color: rgba(255,255,255,0.8); }
.footer__bottom a { color: rgba(255,255,255,0.9); }

/* ========== Breadcrumbs ========== */
.breadcrumb { font-size: var(--text-caption); color: var(--color-slate); margin-bottom: var(--space-4); }
.breadcrumb a { color: var(--color-slate); }
.breadcrumb a:hover { color: var(--color-forest); }
.breadcrumb__sep { margin: 0 var(--space-2); opacity: 0.6; }
.breadcrumb [aria-current="page"] { color: var(--color-charcoal); font-weight: 500; }

/* ========== Forms ========== */
.form-group { margin-bottom: var(--space-4); }
.form-group label { display: block; font-weight: 500; margin-bottom: var(--space-2); font-size: var(--text-caption); }
.form-group input, .form-group textarea { width: 100%; padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); font-family: inherit; font-size: var(--text-body); }
.form-group textarea { min-height: 8rem; resize: vertical; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--color-forest); }
.form-required { color: var(--color-terracotta); }
.checkbox-group { display: flex; align-items: flex-start; gap: var(--space-2); }
.checkbox-group input { width: auto; margin-top: 0.2rem; }

/* ========== Cookie banner (demo) ========== */
.cookie-banner { position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000; background: var(--color-ink); color: var(--color-paper); padding: var(--space-4); box-shadow: 0 -4px 20px rgba(0,0,0,0.2); transform: translateY(100%); transition: transform var(--duration-normal) var(--ease-out); }
.cookie-banner.is-visible { transform: translateY(0); }
.cookie-banner__inner { max-width: var(--container-max); margin: 0 auto; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); }
.cookie-banner p { margin: 0; font-size: var(--text-caption); line-height: var(--line-loose); }
.cookie-banner__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.cookie-prefs { display: none; padding: var(--space-6); background: var(--color-charcoal); margin-top: var(--space-4); border-radius: var(--radius-md); }
.cookie-prefs.is-open { display: block; }
.cookie-prefs h4 { color: var(--color-paper); margin-bottom: var(--space-3); font-size: var(--text-h5); }
.cookie-prefs .form-group { margin-bottom: var(--space-3); }
.cookie-prefs label { color: var(--color-paper); }

/* ========== Back to top ========== */
.back-to-top { position: fixed; bottom: var(--space-6); right: var(--space-4); width: 2.75rem; height: 2.75rem; border-radius: 50%; background: var(--color-terracotta); color: var(--color-white); border: none; cursor: pointer; box-shadow: var(--shadow-card); opacity: 0; visibility: hidden; transform: translateY(0.5rem); transition: opacity var(--duration-normal), visibility var(--duration-normal), transform var(--duration-normal); z-index: 50; display: flex; align-items: center; justify-content: center; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-terracotta-hover); color: var(--color-white); }
.back-to-top:focus-visible { outline: 2px solid var(--color-charcoal); outline-offset: 2px; }

/* ========== Decorative SVG dividers ========== */
.divider { display: block; width: 100%; height: 3rem; margin: var(--space-8) 0; border: none; background: transparent; }
.divider svg { width: 100%; height: 100%; }

/* ========== Utility ========== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.visually-hidden-focusable:not(:focus):not(:focus-within) { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.mt-0 { margin-top: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-center { text-align: center; }
.flex { display: flex; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }