/* =============================================================
 * base.css — Reset, typography primitives, layout utilities
 * Shared by all health.jeyai.ai page templates.
 * Depends on: tokens.css (must be loaded first)
 * ============================================================= */

/* ---------- Font-face (local, Russia-CDN-safe) ---------- */
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Variable.ttf') format('truetype-variations'),
       url('../fonts/Inter-Variable.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Italic-Variable.ttf') format('truetype-variations'),
       url('../fonts/Inter-Italic-Variable.ttf') format('truetype');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  src: url('../fonts/Manrope-Variable.ttf') format('truetype-variations'),
       url('../fonts/Manrope-Variable.ttf') format('truetype');
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--warm-text);
  background: var(--warm-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv02', 'cv11', 'ss01';
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
  padding: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
}

p {
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* Skip-to-content link (WCAG 2.4.1) */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: 9999;
  padding: var(--sp-2) var(--sp-4);
  background: var(--jy-accent);
  color: var(--jy-text-on-accent);
  font-weight: 700;
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: top 0.15s;
}
.skip-link:focus {
  top: var(--sp-4);
  outline: 3px solid var(--jy-accent);
  outline-offset: 2px;
}

/* ---------- Layout containers ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}
.container-article {
  max-width: var(--container-article);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

@media (max-width: 768px) {
  .container,
  .container-narrow,
  .container-article {
    padding: 0 var(--sp-4);
  }
}
@media (max-width: 360px) {
  .container,
  .container-narrow,
  .container-article {
    padding: 0 var(--sp-3);
  }
}

/* ---------- Section primitives ---------- */
.section { padding: var(--sp-24) 0; }
.section-md { padding: var(--sp-16) 0; }
.section-sm { padding: var(--sp-12) 0; }

@media (max-width: 768px) {
  .section { padding: var(--sp-16) 0; }
  .section-md { padding: var(--sp-12) 0; }
  .section-sm { padding: var(--sp-10) 0; }
}

/* Surface modifier classes */
.surface-dark {
  background: var(--jy-bg-primary);
  color: var(--jy-text-primary);
}
.surface-dark-card {
  background: var(--jy-bg-secondary);
  color: var(--jy-text-primary);
}
.surface-warm {
  background: var(--warm-bg);
  color: var(--warm-text);
}
.surface-white {
  background: var(--warm-card);
  color: var(--warm-text);
}

/* ---------- Site header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--jy-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-6);
  max-width: var(--container);
  margin: 0 auto;
}
@media (max-width: 768px) {
  .site-header__inner {
    padding: var(--sp-3) var(--sp-4);
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--jy-text-primary);
  text-decoration: none;
}
.brand__logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--jy-bg-card);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border: 1px solid var(--jy-border);
}
.brand__logo img { width: 24px; height: 24px; }
.brand__name { white-space: nowrap; }
.brand__sub {
  font-size: 11px;
  font-weight: 500;
  color: var(--jy-accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-top: 1px;
  display: block;
}

/* Header nav (desktop only) */
.site-nav {
  display: none;
  gap: var(--sp-6);
  align-items: center;
}
@media (min-width: 1024px) {
  .site-nav { display: flex; }
}
.site-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--jy-text-secondary);
  padding: var(--sp-2) 0;
  transition: color 0.15s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--jy-text-primary);
  outline: 2px solid var(--jy-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- Buttons (shared) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  line-height: 1;
  border-radius: var(--r-full);
  padding: 13px 24px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
  border: none;
}
.btn:focus-visible {
  outline: 3px solid var(--jy-accent);
  outline-offset: 3px;
}
.btn:active { transform: scale(0.98); }

/* Primary: golden on dark */
.btn-primary {
  background: var(--jy-accent);
  color: var(--jy-text-on-accent);
}
.btn-primary:hover { background: var(--jy-accent-hover); }

/* Secondary: ghost */
.btn-secondary {
  background: transparent;
  color: var(--jy-text-primary);
  border: 1.5px solid var(--jy-border-hover);
}
.btn-secondary:hover {
  border-color: var(--jy-accent);
  color: var(--jy-accent);
}

/* Outline warm (on light surfaces) */
.btn-outline-warm {
  background: transparent;
  color: var(--warm-text);
  border: 1.5px solid var(--warm-border);
}
.btn-outline-warm:hover {
  border-color: var(--jy-accent);
  color: var(--jy-accent-hover);
}

/* CTA Telegram (large) */
.btn-tg {
  background: var(--jy-accent);
  color: var(--jy-text-on-accent);
  font-size: var(--text-lg);
  padding: 15px 32px;
  border-radius: var(--r-full);
  font-weight: 700;
}
.btn-tg:hover { background: var(--jy-accent-hover); box-shadow: 0 4px 20px rgba(247,181,0,.35); }
@media (max-width: 480px) {
  .btn-tg { width: 100%; font-size: var(--text-base); padding: 14px 24px; }
}

/* ---------- Site footer ---------- */
.site-footer {
  background: var(--jy-bg-primary);
  color: var(--jy-text-secondary);
  padding: var(--sp-12) 0 var(--sp-8);
  border-top: 1px solid var(--jy-border);
}
.site-footer__inner {
  display: grid;
  gap: var(--sp-8);
}
.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--jy-text-primary);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.site-footer__brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}
.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4) var(--sp-8);
}
.site-footer__links a {
  font-size: var(--text-sm);
  color: var(--jy-text-tertiary);
  transition: color 0.15s;
}
.site-footer__links a:hover { color: var(--jy-text-primary); }
.site-footer__links a:focus-visible {
  outline: 2px solid var(--jy-accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.site-footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--jy-text-tertiary);
  line-height: 1.65;
  max-width: 720px;
}
.site-footer__copy {
  font-size: var(--text-xs);
  color: var(--jy-text-tertiary);
  border-top: 1px solid var(--jy-border);
  padding-top: var(--sp-6);
  margin-top: var(--sp-4);
}

/* ---------- Medical disclaimer banner (warm surface) ---------- */
.disclaimer-banner {
  background: var(--warm-card);
  border: 1.5px solid var(--warm-border);
  border-radius: var(--r-lg);
  padding: var(--sp-5) var(--sp-6);
  font-size: var(--text-sm);
  color: var(--warm-text-2);
  line-height: 1.65;
}
.disclaimer-banner strong {
  color: var(--warm-text);
}
@media (max-width: 480px) {
  .disclaimer-banner { padding: var(--sp-4); }
}

/* ---------- Red flag alert box ---------- */
.alert-red {
  background: var(--color-red-bg);
  border: 2px solid var(--color-red-border);
  border-left: 4px solid var(--color-red);
  border-radius: var(--r-md);
  padding: var(--sp-5) var(--sp-6);
  color: var(--color-red-text);
}
.alert-red__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}
.alert-red ul {
  list-style: disc;
  padding-left: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.alert-red li { font-size: var(--text-sm); line-height: 1.55; }

/* ---------- Ref-range chip (monospace numeric) ---------- */
.ref-range {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--r-full);
  white-space: nowrap;
}
.ref-range--normal {
  background: var(--color-green-bg);
  color: var(--color-green);
  border: 1px solid var(--color-green-border);
}

/* ---------- Care-timing band chips ---------- */
.band {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  line-height: 1.55;
}
.band__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  margin-top: 2px;
  padding: 3px 8px;
  border-radius: var(--r-full);
  flex-shrink: 0;
}
.band--green {
  background: var(--color-green-bg);
  border: 1px solid var(--color-green-border);
}
.band--green .band__label {
  background: var(--color-green);
  color: #fff;
}
.band--amber {
  background: var(--color-amber-bg);
  border: 1px solid var(--color-amber-border);
}
.band--amber .band__label {
  background: var(--color-amber);
  color: #fff;
}
.band--amber-dark {
  background: var(--color-amber-dark-bg);
  border: 1px solid var(--color-amber-dark-border);
}
.band--amber-dark .band__label {
  background: var(--color-amber-dark);
  color: #fff;
}
.band--red {
  background: var(--color-red-bg);
  border: 2px solid var(--color-red-border);
}
.band--red .band__label {
  background: var(--color-red);
  color: #fff;
}

/* ---------- Section heading (content pages) ---------- */
.section-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-3xl);
  color: var(--warm-text);
  margin-bottom: var(--sp-6);
  letter-spacing: -0.02em;
}
.section-heading--dark {
  color: var(--jy-text-primary);
}

/* ---------- Prose (article body) ---------- */
.prose {
  color: var(--warm-text-2);
  font-size: var(--text-base);
  line-height: 1.75;
}
.prose p + p { margin-top: var(--sp-4); }
.prose ul {
  list-style: disc;
  padding-left: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.prose ol {
  list-style: decimal;
  padding-left: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.prose strong { color: var(--warm-text); font-weight: 600; }
.prose a {
  color: var(--jy-accent-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:focus-visible {
  outline: 2px solid var(--jy-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- Focus ring utility (high-vis for WCAG 2.4.7) ---------- */
:focus-visible {
  outline: 2px solid var(--jy-accent);
  outline-offset: 2px;
}
/* Remove default outline for mouse users (not keyboard) */
:focus:not(:focus-visible) { outline: none; }

/* ---------- Visually hidden (screen-reader only) ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ---------- Responsive utilities ---------- */
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}
@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}