/* ==========================================================================
   SAVANNAH - Design System Tokens & Global Styles
   Luxury Sunscreen E-Commerce Storefront
   Palette: Terracotta + Slate (user-specified, not AI-default)
   Shape: 2px radius everywhere (sharp luxury)
   ========================================================================== */

:root {
  /* ---- Color Tokens ---- */
  --surface: #FBF9F6;
  --surface-alt: #F4EFEA;
  --accent: #C85A32;
  --accent-hover: #B24E2B;
  --accent-light: rgba(200, 90, 50, 0.08);
  --text-primary: #1C1C1C;
  --text-secondary: #6B6B6B;
  --text-tertiary: #9A9A9A;
  --border: #E5E0DA;
  --overlay: rgba(28, 28, 28, 0.4);

  /* Mourning mode tokens */
  --mourning-surface: #F5F5F5;
  --mourning-text: #333333;

  /* ---- Typography ---- */
  --font-primary: 'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --weight-black: 900;

  /* ---- Spacing Scale ---- */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* ---- Shape ---- */
  --radius: 2px;

  /* ---- Easing ---- */
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 200ms;
  --dur-normal: 400ms;
  --dur-slow: 600ms;

  /* ---- Z-Index Scale ---- */
  --z-base: 1;
  --z-announcement: 10;
  --z-nav: 20;
  --z-cart-overlay: 30;
  --z-cart-drawer: 31;
  --z-popup-overlay: 40;
  --z-popup: 41;
  --z-flags: 50;

  /* ---- Layout ---- */
  --max-w: 1400px;
  --nav-h: 64px;
  --announcement-h: 40px;
}

/* Mourning mode: global grayscale filter */
html.mourning-mode {
  filter: grayscale(1);
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--weight-regular);
  color: var(--text-primary);
  background-color: var(--surface);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Typography Scale
   ========================================================================== */

.text-display {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: var(--weight-bold);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.text-h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--weight-bold);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.text-h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: var(--weight-bold);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.text-h3 {
  font-size: 1.25rem;
  font-weight: var(--weight-medium);
  line-height: 1.3;
}

.text-body {
  font-size: 1rem;
  font-weight: var(--weight-regular);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 65ch;
}

.text-small {
  font-size: 0.875rem;
  font-weight: var(--weight-regular);
  line-height: 1.5;
  color: var(--text-secondary);
}

.text-caption {
  font-size: 0.75rem;
  font-weight: var(--weight-medium);
  line-height: 1.4;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sp-6);
  padding-right: var(--sp-6);
}

@media (max-width: 767px) {
  .container {
    padding-left: var(--sp-4);
    padding-right: var(--sp-4);
  }
}

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

/* ==========================================================================
   Button Styles
   ========================================================================== */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-8);
  background-color: var(--accent);
  color: #FFFFFF;
  font-weight: var(--weight-medium);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: background-color var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-smooth);
  white-space: nowrap;
}

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

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-8);
  background-color: transparent;
  color: var(--text-primary);
  font-weight: var(--weight-medium);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-smooth);
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: var(--text-primary);
}

.btn-secondary:active {
  transform: translateY(1px) scale(0.98);
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}