/* ==========================================================================
   SMILE AND SKIN CO. — CORE DESIGN SYSTEM & MAIN STYLESHEET
   Brand Palette: Deep Burgundy, Warm Nude / Beige, Charcoal, Soft Ivory
   ========================================================================== */

:root {
  /* Brand Primary Colors (Deep Burgundy / Wine) */
  --color-primary-900: #380B1B;
  --color-primary-800: #4B0F23;
  --color-primary-700: #5E132B;
  --color-primary: #6B1732;
  --color-primary-600: #7E1C3C;
  --color-primary-500: #932247;
  --color-primary-light: #FBF2F4;
  --color-primary-muted: rgba(107, 23, 50, 0.08);

  /* Brand Secondary Colors (Warm Nude / Champagne Beige) */
  --color-secondary-900: #684A3B;
  --color-secondary-800: #8A6451;
  --color-secondary-700: #B28770;
  --color-secondary: #C8A28D;
  --color-secondary-300: #DEC7B9;
  --color-secondary-200: #EBDCD4;
  --color-secondary-100: #F5EEE9;
  --color-secondary-50: #FAF5F1;

  /* Neutral Surface Colors */
  --color-bg-page: #FAF7F2;
  --color-bg-card: #FFFFFF;
  --color-bg-subtle: #F4EFEA;
  --color-bg-dark: #1E1618;
  --color-bg-dark-card: #281F22;

  /* Text Colors */
  --color-text-main: #1F1A1B;
  --color-text-heading: #140E10;
  --color-text-muted: #61565A;
  --color-text-light: #877C81;
  --color-text-inverse: #FFFFFF;
  --color-text-inverse-muted: #D1C5C9;

  /* Borders & Dividers */
  --color-border-subtle: #E8E0D7;
  --color-border-medium: #D5C9BE;
  --color-border-dark: rgba(255, 255, 255, 0.12);

  /* Accents & Signals */
  --color-accent-gold: #C99700;
  --color-success: #1E7E34;
  --color-success-bg: #EAF5EC;
  --color-error: #B02A37;
  --color-error-bg: #FDF2F2;

  /* Typography System */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Spacing Scale (8pt System) */
  --space-2: 0.125rem; /* 2px */
  --space-4: 0.25rem;  /* 4px */
  --space-8: 0.5rem;   /* 8px */
  --space-12: 0.75rem; /* 12px */
  --space-16: 1rem;    /* 16px */
  --space-20: 1.25rem; /* 20px */
  --space-24: 1.5rem;  /* 24px */
  --space-32: 2rem;    /* 32px */
  --space-40: 2.5rem;  /* 40px */
  --space-48: 3rem;    /* 48px */
  --space-64: 4rem;    /* 64px */
  --space-80: 5rem;    /* 80px */
  --space-96: 6rem;    /* 96px */
  --space-120: 7.5rem; /* 120px */

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(31, 26, 27, 0.04);
  --shadow-sm: 0 2px 8px rgba(31, 26, 27, 0.06);
  --shadow-md: 0 6px 20px rgba(31, 26, 27, 0.08);
  --shadow-lg: 0 12px 36px rgba(31, 26, 27, 0.1);
  --shadow-xl: 0 20px 48px rgba(31, 26, 27, 0.14);
  --shadow-burgundy: 0 8px 24px rgba(107, 23, 50, 0.22);

  /* Layout Widths */
  --container-max: 1240px;
  --container-narrow: 860px;
  --container-wide: 1360px;

  /* Transitions */
  --transition-fast: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 280ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 450ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   CSS RESET & STRICT OVERFLOW PREVENTION BASE
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  width: 100%;
  max-width: 100%;
  min-height: 100%;
  overscroll-behavior: none;
  overscroll-behavior-y: none;
  overscroll-behavior-x: none;
  overflow-x: clip;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-page);
  color: var(--color-text-main);
  line-height: 1.65;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
  max-width: 100%;
  min-height: 100%;
  overscroll-behavior: none;
  overscroll-behavior-y: none;
  overscroll-behavior-x: none;
  touch-action: pan-y;
  overflow-x: clip;
  position: relative;
  margin: 0;
  padding: 0;
}

@supports not (overflow-x: clip) {
  html, body {
    overflow-x: hidden;
  }
}

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

img {
  -webkit-user-drag: none;
  user-select: none;
}

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

a:hover {
  color: var(--color-primary-800);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

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

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.015em;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

h1 {
  font-size: clamp(2rem, 4vw + 0.8rem, 3.75rem);
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(1.75rem, 2.6vw + 0.4rem, 2.75rem);
}

h3 {
  font-size: clamp(1.3rem, 1.6vw + 0.3rem, 1.85rem);
  line-height: 1.3;
}

h4 {
  font-size: 1.2rem;
  line-height: 1.35;
}

p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-16);
  font-size: 1.025rem;
  overflow-wrap: break-word;
}

p.lead {
  font-size: clamp(1.05rem, 1.1vw + 0.75rem, 1.25rem);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-12);
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--color-secondary-700);
  border-radius: var(--radius-pill);
}

.eyebrow.eyebrow-light {
  color: var(--color-secondary-200);
}

.eyebrow.eyebrow-light::before {
  background: var(--color-secondary);
}

/* ==========================================================================
   CONTAINERS & LAYOUT
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-20);
  padding-right: var(--space-20);
}

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

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

.section {
  padding-top: clamp(3rem, 6vw, 6rem);
  padding-bottom: clamp(3rem, 6vw, 6rem);
  position: relative;
  width: 100%;
  overflow: hidden;
}

.section-tight {
  padding-top: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(2rem, 4vw, 3.5rem);
}

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

.section-white {
  background-color: #FFFFFF;
}

.section-beige {
  background-color: var(--color-secondary-50);
}

.section-burgundy {
  background-color: var(--color-primary-800);
  color: var(--color-text-inverse);
}

.section-burgundy h2, 
.section-burgundy h3, 
.section-burgundy h4 {
  color: var(--color-text-inverse);
}

.section-burgundy p {
  color: var(--color-text-inverse-muted);
}

.section-header {
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-header.text-center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-header.text-center .eyebrow {
  justify-content: center;
}

.section-header.text-center .eyebrow::after {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--color-secondary-700);
  border-radius: var(--radius-pill);
}

/* Flex & Grid Utilities */
.grid {
  display: grid;
  gap: var(--space-24);
  width: 100%;
}

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

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

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

.grid-split {
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 4vw, 4.5rem);
}

.grid-doctor-featured {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: clamp(2rem, 4vw, 4rem);
}

@media (max-width: 992px) {
  .grid-2, .grid-3, .grid-4, .grid-split, .grid-doctor-featured {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 600px) and (max-width: 992px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .container,
  .section-container,
  .content-wrapper {
    width: 100%;
    max-width: 100%;
    padding-left: 16px;
    padding-right: 16px;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
  }

  .grid,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-split,
  .grid-doctor-featured {
    width: 100%;
    max-width: 100%;
    grid-template-columns: 1fr;
    gap: var(--space-20);
    box-sizing: border-box;
  }

  .grid > *,
  .grid-2 > *,
  .grid-3 > *,
  .grid-4 > *,
  .grid-split > *,
  .grid-doctor-featured > * {
    min-width: 0;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
  }
}