/* ============================================================
   main.css — Design tokens, global reset, typography
   jeriatrics.com
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Montserrat:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --color-bg-primary:    #0d1b2a;
  --color-bg-secondary:  #111f30;
  --color-bg-tertiary:   #162236;
  --color-accent:        #9b1d20;
  --color-accent-light:  #c0393d;
  --color-gold:          #c9a84c;
  --color-text-primary:  #f8f9fa;
  --color-text-secondary:#a8b8cc;
  --color-text-muted:    #6b7f96;
  --color-border:        #1e3048;
  --color-white:         #ffffff;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-ui:      'Montserrat', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;

  /* Type scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  /* Layout */
  --max-width:        1200px;
  --section-pad-v:    80px;
  --section-pad-v-sm: 48px;
  --border-radius:    8px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Apple-smooth easing curves */
  --ease-smooth:    cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out-expo:  cubic-bezier(0.19, 1, 0.22, 1);
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Warm / light section palette */
  --color-bg-warm:        #f5f0e8;
  --color-bg-warm-2:      #ece7dc;
  --color-bg-deep:        #060e18;
  --color-text-warm:      #1a1410;
  --color-text-warm-2:    #5a4e44;
  --color-text-warm-muted:#9a8a7e;
}

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ── Skip Link (accessibility) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  z-index: 10000;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* ── Focus styles ── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ── Container ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

@media (min-width: 1440px) {
  .container {
    padding: 0 2.5rem;
  }
}

/* ── Section wrapper ── */
.section {
  padding: var(--section-pad-v-sm) 0;
}

@media (min-width: 1024px) {
  .section {
    padding: var(--section-pad-v) 0;
  }
}

/* ── Section header ── */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--text-4xl);
  }
}

.section-divider {
  width: 60px;
  height: 2px;
  background-color: var(--color-gold);
  margin: 0 auto;
  border: none;
}

.section-subtitle {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Typography utilities ── */
.font-display { font-family: var(--font-display); }
.font-ui      { font-family: var(--font-ui); }
.font-body    { font-family: var(--font-body); }

.text-primary   { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted     { color: var(--color-text-muted); }
.text-accent    { color: var(--color-accent); }
.text-gold      { color: var(--color-gold); }
.text-white     { color: var(--color-white); }

.text-xs   { font-size: var(--text-xs); }
.text-sm   { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg   { font-size: var(--text-lg); }
.text-xl   { font-size: var(--text-xl); }
.text-2xl  { font-size: var(--text-2xl); }
.text-3xl  { font-size: var(--text-3xl); }

.font-light    { font-weight: 300; }
.font-regular  { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

.italic { font-style: italic; }

.uppercase      { text-transform: uppercase; }
.tracking-wide  { letter-spacing: 0.05em; }
.tracking-wider { letter-spacing: 0.1em; }

.text-center { text-align: center; }
.text-left   { text-align: left; }

/* ── Layout utilities ── */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-sm  { gap: 0.5rem; }
.gap-md  { gap: 1rem; }
.gap-lg  { gap: 1.5rem; }
.gap-xl  { gap: 2rem; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ── Visibility ── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Section variants ── */
.section-warm {
  background-color: var(--color-bg-warm);
}

.section-deep {
  background-color: var(--color-bg-deep);
}

/* ── Section eyebrow label ── */
.section-eyebrow {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.75rem;
}

.section-eyebrow--dark {
  color: var(--color-accent);
}

/* Title and divider variants for warm/light sections */
.section-title--dark {
  color: var(--color-text-warm);
}

.section-divider--accent {
  background-color: var(--color-accent);
}

/* Section link variant for light sections */
.section-link--dark {
  color: var(--color-accent);
}

.section-link--dark:hover {
  color: var(--color-text-warm);
  gap: 0.6rem;
}

/* ── Fade-in animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-smooth), transform 0.7s var(--ease-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Stagger animation ── */
.stagger-item {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s var(--ease-smooth), transform 0.6s var(--ease-smooth);
  transition-delay: var(--stagger-delay, 0ms);
}

.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Page hero banner (inner pages) ── */
.page-hero {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(155, 29, 32, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  z-index: 1;
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
}

.page-hero-subtitle {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}