/* ============================================================
   tokens.css — Design System Tokens (Shared across all pages)
   healthinsight.news project
   ============================================================ */

/* ── Color Palette ───────────────────────────────────────── */
:root {
  /* Primary — Crimson */
  --color-primary:                #9e0000;
  --color-primary-container:      #cc0000;
  --color-primary-fixed:          #ffdad4;
  --color-primary-fixed-dim:      #ffb4a8;
  --color-on-primary:             #ffffff;
  --color-on-primary-fixed:       #410000;
  --color-on-primary-fixed-variant:#930000;
  --color-inverse-primary:        #ffb4a8;

  /* Secondary — Teal */
  --color-secondary:              #006a6a;
  --color-secondary-container:    #90efef;
  --color-secondary-fixed:        #93f2f2;
  --color-secondary-fixed-dim:    #76d6d5;
  --color-on-secondary:           #ffffff;
  --color-on-secondary-container: #006e6e;
  --color-on-secondary-fixed:     #002020;
  --color-on-secondary-fixed-variant:#004f4f;

  /* Tertiary — Gold */
  --color-tertiary:               #735c00;
  --color-tertiary-container:     #cba72f;
  --color-tertiary-fixed:         #ffe088;
  --color-tertiary-fixed-dim:     #e9c349;
  --color-on-tertiary:            #ffffff;
  --color-on-tertiary-container:  #4e3d00;
  --color-on-tertiary-fixed:      #241a00;
  --color-on-tertiary-fixed-variant:#574500;

  /* Error */
  --color-error:                  #ba1a1a;
  --color-error-container:        #ffdad6;
  --color-on-error:               #ffffff;
  --color-on-error-container:     #93000a;

  /* Surface */
  --color-surface:                #faf8ff;
  --color-surface-dim:            #d2d9f4;
  --color-surface-bright:         #faf8ff;
  --color-surface-tint:           #c00000;
  --color-surface-variant:        #dae2fd;
  --color-surface-container:      #eaedff;
  --color-surface-container-low:  #f2f3ff;
  --color-surface-container-high: #e2e7ff;
  --color-surface-container-highest:#dae2fd;
  --color-surface-container-lowest:#ffffff;
  --color-on-surface:             #131b2e;
  --color-on-surface-variant:     #5e3f3a;
  --color-inverse-surface:        #283044;
  --color-inverse-on-surface:     #eef0ff;

  /* Background */
  --color-background:             #faf8ff;
  --color-on-background:          #131b2e;

  /* Outline */
  --color-outline:                #926e69;
  --color-outline-variant:        #e8bdb6;

  /* ── Typography ─────────────────────────────────────────── */
  --font-serif:    'Cormorant Garamond', Georgia, serif;
  --font-body:     'DM Sans', system-ui, sans-serif;
  --font-mono:     'JetBrains Mono', 'Courier New', monospace;
  --font-headline: 'Newsreader', Georgia, serif;
  --font-label:    'Inter', system-ui, sans-serif;
  --font-public:   'Public Sans', system-ui, sans-serif;

  /* ── Border Radius ──────────────────────────────────────── */
  --radius-sm:   0.125rem;
  --radius:      0.25rem;
  --radius-lg:   0.5rem;
  --radius-full: 0.75rem;

  /* ── Spacing / Layout ───────────────────────────────────── */
  --max-w-3xl:   48rem;    /* ~768px */
  --max-w-4xl:   56rem;    /* ~896px */
  --max-w-6xl:   72rem;    /* ~1152px */
  --max-w-7xl:   80rem;    /* ~1280px */

  /* ── Transitions ────────────────────────────────────────── */
  --transition-base: 200ms ease;
  --transition-slow: 700ms ease;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: 5rem;
}

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

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

/* ── Material Symbols ────────────────────────────────────── */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  user-select: none;
  vertical-align: middle;
}

/* ── Typography Helpers ─────────────────────────────────── */
.font-serif   { font-family: var(--font-serif); }
.font-mono    { font-family: var(--font-mono); }
.font-body    { font-family: var(--font-body); }
.font-headline { font-family: var(--font-headline); }
.font-label   { font-family: var(--font-label); }


/* ── Accessibility ──────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* ══════════════════════════════════════════════════════════
   SHARED HEADER (TOP NAV)
   ══════════════════════════════════════════════════════════ */
.top-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background-color: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
}

.top-nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  max-width: var(--max-w-7xl, 1280px);
  margin: 0 auto;
  flex-wrap: wrap;
}

.top-nav__logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: -0.05em;
  font-weight: 700;
  color: #0f172a;
}

/* Hamburger Toggle */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  margin-left: auto;
  margin-right: 1rem;
}

.nav-toggle-label .material-symbols-outlined {
  font-size: 1.75rem;
  color: #0f172a;
}

.top-nav__links {
  display: none;
  width: 100%;
  flex-direction: column;
  gap: 0;
  padding: 1rem 0;
  margin-top: 0.5rem;
  border-top: 1px solid rgba(226,232,240,0.5);
  font-size: 1.125rem;
}

.nav-toggle:checked ~ .top-nav__links {
  display: flex;
}

@media (min-width: 768px) {
  .nav-toggle-label {
    display: none;
  }
  .top-nav__inner {
    flex-wrap: nowrap;
  }
  .top-nav__links {
    display: flex;
    width: auto;
    flex-direction: row;
    align-items: center;
    border-top: none;
    margin-top: 0;
    padding: 0;
    gap: 2rem;
    font-size: 1rem;
    justify-content: flex-start;
    order: 2;
    margin-right: auto;
    margin-left: 2rem;
  }
}

.top-nav__link {
  color: #4b5563;
  font-weight: 500;
  transition: color var(--transition-base), opacity var(--transition-base);
  width: 100%;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(226,232,240,0.3);
}

.top-nav__link:hover {
  color: #0f172a;
  opacity: 0.8;
}

@media (min-width: 768px) {
  .top-nav__link {
    width: auto;
    padding: 0;
    border-bottom: none;
  }
}

.top-nav__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.top-nav__subscribe {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(155deg, #9e0000 0%, #cc0000 100%);
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: opacity var(--transition-base);
  display: none;
}

@media (min-width: 768px) {
  .top-nav__actions {
    order: 3;
  }
  .top-nav__subscribe {
    display: inline-block;
  }
}

.top-nav__subscribe:hover { opacity: 0.8; }

.top-nav__account {
  color: #4b5563;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ══════════════════════════════════════════════════════════
   SHARED FOOTER
   ══════════════════════════════════════════════════════════ */
.site-footer {
  background-color: #f1f5f9;
  width: 100%;
  padding: 3rem 1.5rem;
  border-top: 1px solid #e5e7eb;
}

.site-footer__inner {
  max-width: var(--max-w-7xl);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .site-footer__inner { grid-template-columns: repeat(2, 1fr); }
}

.site-footer__brand-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
  display: block;
  margin-bottom: 1rem;
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: #6b7280;
  line-height: 1.625;
  text-transform: uppercase;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: flex-start;
}

@media (min-width: 768px) {
  .site-footer__links { justify-content: flex-end; }
}

.site-footer__link {
  font-family: sans-serif;
  font-size: 0.875rem;
  color: #6b7280;
  transition: color var(--transition-base);
}

.site-footer__link:hover { color: #1f2937; }

/* ══════════════════════════════════════════════════════════
   SHARED LOGO COMPONENT
   Used in all pages: bridge, vsl, case, research
   ══════════════════════════════════════════════════════════ */
.logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: transform 250ms ease;
}

.logo-link:hover .logo-icon {
  transform: rotate(12deg);
}

.logo-icon .material-symbols-outlined {
  font-size: 2.25rem;
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  color: var(--color-primary);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  display: flex;
  align-items: baseline;
  line-height: 1;
}

.logo-name-health {
  font-family: var(--font-label);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #0f172a;
}

.logo-name-insight {
  font-family: var(--font-label);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-primary);
}

.logo-tagline {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 500;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  line-height: 1;
  margin-top: 3px;
}