/* ============================================================
   KOI Beauty — Design System
   Palette: Sage & Cream (Option C)
   Fonts: Cormorant Garamond (headings) + Inter (body)

   This file defines all reusable tokens. Change values here
   and they update across the entire site automatically.
   ============================================================ */

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

/* --- Design Tokens (Custom Properties) --- */
:root {
  /* Colors */
  --color-bg:          #F5F1EB;
  --color-bg-alt:      #EEEAD3;
  --color-white:       #FFFFFF;
  --color-text:        #1A1A1A;
  --color-text-muted:  #6B6B6B;
  --color-text-light:  #9A9A9A;
  --color-accent:      #A8B5A0;
  --color-accent-dark: #8FA087;
  --color-accent-light:#C8D4C2;
  --color-border:      #E0DCD5;
  --color-overlay:     rgba(26, 26, 26, 0.55);

  /* Typography */
  --font-heading: 'Cormorant Garamond', 'Georgia', serif;
  --font-body:    'Inter', 'Helvetica Neue', Arial, sans-serif;

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

  /* 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: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width:       1200px;
  --max-width-narrow: 800px;
  --border-radius:   4px;
  --border-radius-lg: 8px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-dark);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
}

h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-3xl));
}

h4 {
  font-size: var(--text-xl);
  font-weight: 500;
}

p {
  margin-bottom: var(--space-md);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-light {
  color: var(--color-text-light);
}

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

.uppercase {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: var(--text-xs);
  font-weight: 500;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: var(--space-5xl) 0;
}

.section--alt {
  background-color: var(--color-white);
}

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

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-2xl);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-text);
}

.btn--outline:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--dark {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn--dark:hover {
  background-color: #333;
  color: var(--color-bg);
}

.btn--sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-lg) var(--space-3xl);
  font-size: var(--text-base);
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.card__image {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.card__body {
  padding: var(--space-xl);
}

/* --- Divider --- */
.divider {
  width: 60px;
  height: 1.5px;
  background-color: var(--color-accent);
  border: none;
  margin: var(--space-lg) 0;
}

.divider--center {
  margin-left: auto;
  margin-right: auto;
}