/* ============================================================
   THE JOY IN LIVING — Design System
   Calm Luxury Aesthetic | Mental Health & Wellness
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Brand Colors — Calm Luxury Palette */
  --sage: #8B9E8B;
  --sage-light: #B5C5B5;
  --sage-lighter: #D4DED4;
  --sage-dark: #5A6F5A;
  --sage-deep: #3D4F3D;

  --cream: #FAF7F2;
  --cream-dark: #F0EBE3;
  --warm-white: #FEFCF9;
  --sand: #E8DDD3;
  --sand-dark: #D4C8BB;

  --terra: #C4956A;
  --terra-light: #D4AE8A;
  --terra-dark: #A87A52;

  --charcoal: #2C2C2C;
  --slate: #5A5A5A;
  --stone: #8A8A8A;
  --mist: #B0B0B0;

  --blush: #E8D5D0;
  --blush-light: #F2E8E5;
  --ocean: #7BA0B5;
  --ocean-light: #A3C0D0;
  --lavender: #B8A9C9;
  --lavender-light: #D4CBE0;

  --white: #FFFFFF;
  --black: #1A1A1A;
  --overlay: rgba(26, 26, 26, 0.45);
  --overlay-light: rgba(26, 26, 26, 0.08);

  /* Semantic Colors */
  --color-primary: var(--sage);
  --color-primary-hover: var(--sage-dark);
  --color-accent: var(--terra);
  --color-accent-hover: var(--terra-dark);
  --color-bg: var(--cream);
  --color-bg-alt: var(--warm-white);
  --color-surface: var(--white);
  --color-text: var(--charcoal);
  --color-text-secondary: var(--slate);
  --color-text-muted: var(--stone);
  --color-border: var(--sand);
  --color-border-light: var(--cream-dark);
  --color-success: #6B9E6B;
  --color-warning: #D4A34A;
  --color-danger: #C26565;

  /* Typography */
  --font-heading: 'DM Serif Display', 'Georgia', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Cormorant Garamond', 'Georgia', serif;

  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.125rem;    /* 18px */
  --text-lg: 1.25rem;     /* 20px */
  --text-xl: 1.5rem;      /* 24px */
  --text-2xl: 1.875rem;   /* 30px */
  --text-3xl: 2.25rem;    /* 36px */
  --text-4xl: 3rem;       /* 48px */
  --text-5xl: 3.75rem;    /* 60px */
  --text-6xl: 4.5rem;     /* 72px */

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;
  --tracking-widest: 0.14em;

  /* Spacing (8px grid) */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-28: 7rem;     /* 112px */
  --space-32: 8rem;     /* 128px */

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --max-width-wide: 1400px;
  --content-padding: var(--space-6);
  --section-padding: var(--space-20);
  --section-padding-lg: var(--space-28);

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-soft: 0 4px 24px rgba(139,158,139,0.12);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.05);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.10);

  /* Transitions */
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;

  /* Z-Index Scale */
  --z-base: 1;
  --z-sticky: 100;
  --z-nav: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-chatbot: 500;
  --z-toast: 600;
}

/* --- Responsive Overrides --- */
@media (max-width: 768px) {
  :root {
    --section-padding: var(--space-12);
    --section-padding-lg: var(--space-16);
    --content-padding: var(--space-4);
    --text-5xl: 2.75rem;
    --text-4xl: 2.25rem;
    --text-3xl: 1.875rem;
    --text-2xl: 1.5rem;
  }
}

@media (max-width: 480px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --content-padding: var(--space-4);
  }
}

/* ============================================================
   CSS RESET — Modern Minimal
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--leading-tight);
  color: var(--color-text);
  overflow-wrap: break-word;
}

p {
  overflow-wrap: break-word;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

.heading-1 {
  font-size: var(--text-5xl);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

.heading-2 {
  font-size: var(--text-4xl);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

.heading-3 {
  font-size: var(--text-3xl);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
}

.heading-4 {
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: var(--leading-snug);
}

.heading-5 {
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: var(--leading-snug);
}

.heading-6 {
  font-size: var(--text-lg);
  font-weight: 500;
  font-family: var(--font-body);
  line-height: var(--leading-snug);
}

.body-lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.body-md {
  font-size: var(--text-md);
  line-height: var(--leading-normal);
}

.body-sm {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.body-xs {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

.accent-text {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-primary);
}

.label-lg {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-primary);
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
}

.section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.section-lg {
  padding-top: var(--section-padding-lg);
  padding-bottom: var(--section-padding-lg);
}

.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }

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

.mx-auto { margin-left: auto; margin-right: auto; }

/* ============================================================
   SECTION HEADERS
   ============================================================ */

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-header .label {
  display: block;
  margin-bottom: var(--space-4);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.section-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--sage), var(--terra));
  margin: var(--space-6) auto;
  border: none;
}

/* ============================================================
   BACKGROUND VARIANTS
   ============================================================ */

.bg-cream { background-color: var(--cream); }
.bg-white { background-color: var(--white); }
.bg-warm { background-color: var(--warm-white); }
.bg-sage { background-color: var(--sage); color: var(--white); }
.bg-sage-light { background-color: var(--sage-lighter); }
.bg-blush { background-color: var(--blush-light); }
.bg-sand { background-color: var(--sand); }

/* ============================================================
   SCROLL ANIMATIONS (applied via IntersectionObserver)
   ============================================================ */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slower) var(--ease-soft),
              transform var(--duration-slower) var(--ease-soft);
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity var(--duration-slower) var(--ease-soft),
              transform var(--duration-slower) var(--ease-soft);
}

.fade-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity var(--duration-slower) var(--ease-soft),
              transform var(--duration-slower) var(--ease-soft);
}

.fade-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity var(--duration-slower) var(--ease-soft),
              transform var(--duration-slower) var(--ease-soft);
}

.scale-in.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  transition-delay: calc(var(--stagger-index, 0) * 80ms);
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */

.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;
}

:focus-visible {
  outline: 2px solid var(--sage);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .fade-in, .fade-in-left, .fade-in-right, .scale-in {
    opacity: 1;
    transform: none;
  }
}