/* ==========================================================================
   ANAVA CLINICS — Design System
   styles.css — Variables, Reset, Base Styles, Typography, Utilities
   ========================================================================== */

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

/* --------------------------------------------------------------------------
   CSS Variables — ANAVA Design System
   -------------------------------------------------------------------------- */

:root {
  /* Brand Colours */
  --deep-pine:       #1F3B34;
  --brass:           #B98A3E;
  --clay:            #C56B4F;
  --bone:            #F4F1EA;
  --graphite:        #2D2D2D;

  /* Derived Colours */
  --deep-pine-light: #2a4f46;
  --deep-pine-dark:  #152920;
  --bone-dark:       #E8E4DC;
  --brass-light:     #c9a05c;
  --brass-dim:       rgba(185, 138, 62, 0.15);
  --clay-light:      #d4826a;
  --graphite-muted:  #6b6b6b;
  --white:           #ffffff;

  /* Semantic Tokens */
  --color-bg:           var(--bone);
  --color-surface:      var(--white);
  --color-text:         var(--graphite);
  --color-text-muted:   var(--graphite-muted);
  --color-heading:      var(--deep-pine);
  --color-accent:       var(--brass);
  --color-accent-warm:  var(--clay);
  --color-border:       rgba(31, 59, 52, 0.10);
  --color-border-light: rgba(31, 59, 52, 0.05);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body:    'Nunito Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Type Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-md:   1.125rem;
  --text-lg:   1.25rem;
  --text-xl:   1.5rem;
  --text-2xl:  2rem;
  --text-3xl:  2.5rem;
  --text-4xl:  3.25rem;
  --text-5xl:  4rem;
  --text-6xl:  5rem;
  --text-hero: clamp(3rem, 7vw, 6rem);

  /* Line Heights */
  --leading-tight:   1.1;
  --leading-snug:    1.3;
  --leading-normal:  1.6;
  --leading-relaxed: 1.85;

  /* Letter Spacing */
  --tracking-tight:   -0.025em;
  --tracking-normal:  0;
  --tracking-wide:    0.03em;
  --tracking-wider:   0.07em;
  --tracking-widest:  0.14em;

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

  /* Radius */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(21, 41, 32, 0.06);
  --shadow-md: 0 4px 20px rgba(21, 41, 32, 0.09);
  --shadow-lg: 0 8px 40px rgba(21, 41, 32, 0.12);
  --shadow-xl: 0 16px 56px rgba(21, 41, 32, 0.14);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.45s ease;

  /* Layout */
  --container-max:    1280px;
  --container-narrow: 840px;
  --container-wide:   1440px;
  --nav-height:       80px;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
}

img, video, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { border: none; background: none; font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-heading);
  letter-spacing: var(--tracking-tight);
}

p { line-height: var(--leading-relaxed); }

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.container--narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.container--wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.section       { padding: var(--space-24) 0; overflow-x: hidden; }
.section--lg   { padding: var(--space-32) 0; overflow-x: hidden; }
.section--sm   { padding: var(--space-16) 0; overflow-x: hidden; }

/* --------------------------------------------------------------------------
   Typography Scale
   -------------------------------------------------------------------------- */

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: var(--space-6);
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--brass);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Colour Utilities
   -------------------------------------------------------------------------- */

.text-pine     { color: var(--deep-pine); }
.text-brass    { color: var(--brass); }
.text-clay     { color: var(--clay); }
.text-bone     { color: var(--bone); }
.text-muted    { color: var(--color-text-muted); }
.text-white    { color: var(--white); }

.bg-pine       { background-color: var(--deep-pine); }
.bg-pine-dark  { background-color: var(--deep-pine-dark); }
.bg-bone       { background-color: var(--bone); }
.bg-surface    { background-color: var(--color-surface); }

/* --------------------------------------------------------------------------
   Animation System
   -------------------------------------------------------------------------- */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(185, 138, 62, 0.2); }
  50%       { box-shadow: 0 0 0 8px rgba(185, 138, 62, 0); }
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   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: 0;
}

:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--deep-pine);
  color: var(--bone);
  padding: var(--space-3) var(--space-6);
  z-index: 9999;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus { top: 0; }

/* --------------------------------------------------------------------------
   Dividers & Decorative Elements
   -------------------------------------------------------------------------- */

.divider {
  width: 48px; height: 1px;
  background-color: var(--brass);
  margin: var(--space-6) 0;
}

.divider--center { margin: var(--space-6) auto; }
.divider--lg { width: 64px; height: 1.5px; }

/* --------------------------------------------------------------------------
   Grid Primitives
   -------------------------------------------------------------------------- */

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-6); }