/* ==========================================================
   NursePath Wellness — base.css
   Design tokens + reset + base styles
   ========================================================== */

:root {
  /* ---------- Type Scale (fluid) ---------- */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7.5rem);

  /* ---------- Spacing (4px) ---------- */
  --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:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* ---------- Content widths ---------- */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;
  --content-xwide:   1360px;

  /* ---------- Transitions ---------- */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow:        500ms cubic-bezier(0.16, 1, 0.3, 1);

  /* ---------- Fonts ---------- */
  --font-display: 'Zodiak', 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body:    'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ==========================================================
   COLOR — Sage Palette (LIGHT)
   ========================================================== */
:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg:              #FAF9F6;
  --color-surface:         #FFFFFF;
  --color-surface-2:       #F5F3EE;
  --color-surface-offset:  #EFEDE6;
  --color-surface-sage:    #E8EFE9;
  --color-surface-gold:    #F5EDE0;

  /* Borders */
  --color-border:          #DDD9D3;
  --color-divider:         #E6E2DB;

  /* Text */
  --color-text:            #2D3B31;
  --color-text-muted:      #6B7C6F;
  --color-text-faint:      #A3ADA6;
  --color-text-inverse:    #FAF9F6;

  /* Primary (Sage) */
  --color-primary:         #5F7B6A;
  --color-primary-hover:   #4A6354;
  --color-primary-active:  #3B4F44;
  --color-primary-highlight: #E8EFE9;

  /* Accent (Warm Gold) */
  --color-accent:          #C4A47C;
  --color-accent-hover:    #A88961;
  --color-accent-light:    #F5EDE0;

  /* Semantic */
  --color-error:   #A12C7B;
  --color-warning: #964219;
  --color-success: #437A22;

  /* Shadows — tone-matched to warm cream */
  --shadow-xs: 0 1px 2px rgba(45, 59, 49, 0.04);
  --shadow-sm: 0 2px 6px rgba(45, 59, 49, 0.06);
  --shadow-md: 0 8px 24px rgba(45, 59, 49, 0.08);
  --shadow-lg: 0 20px 48px rgba(45, 59, 49, 0.12);
  --shadow-xl: 0 32px 64px rgba(45, 59, 49, 0.16);

  /* Overlay for header blur */
  --color-header-bg: rgba(250, 249, 246, 0.82);
}

/* ==========================================================
   COLOR — Sage Palette (DARK)
   ========================================================== */
[data-theme='dark'] {
  --color-bg:              #1A1E1B;
  --color-surface:         #222724;
  --color-surface-2:       #2A2F2C;
  --color-surface-offset:  #2E3431;
  --color-surface-sage:    #2C3832;
  --color-surface-gold:    #3A342A;

  --color-border:          #363B37;
  --color-divider:         #2D3230;

  --color-text:            #D4DCD6;
  --color-text-muted:      #8A9690;
  --color-text-faint:      #5D6864;
  --color-text-inverse:    #1A1E1B;

  --color-primary:         #7FA38A;
  --color-primary-hover:   #95B8A0;
  --color-primary-active:  #A8C7B2;
  --color-primary-highlight: #2C3832;

  --color-accent:          #D6B98E;
  --color-accent-hover:    #E4CCA7;
  --color-accent-light:    #3A342A;

  --color-error:   #D163A7;
  --color-warning: #C87444;
  --color-success: #7BA94D;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 32px 64px rgba(0, 0, 0, 0.6);

  --color-header-bg: rgba(26, 30, 27, 0.82);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #1A1E1B;
    --color-surface:         #222724;
    --color-surface-2:       #2A2F2C;
    --color-surface-offset:  #2E3431;
    --color-surface-sage:    #2C3832;
    --color-surface-gold:    #3A342A;
    --color-border:          #363B37;
    --color-divider:         #2D3230;
    --color-text:            #D4DCD6;
    --color-text-muted:      #8A9690;
    --color-text-faint:      #5D6864;
    --color-text-inverse:    #1A1E1B;
    --color-primary:         #7FA38A;
    --color-primary-hover:   #95B8A0;
    --color-primary-active:  #A8C7B2;
    --color-primary-highlight: #2C3832;
    --color-accent:          #D6B98E;
    --color-accent-hover:    #E4CCA7;
    --color-accent-light:    #3A342A;
    --color-header-bg: rgba(26, 30, 27, 0.82);
  }
}

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: calc(var(--space-16) + var(--space-4));
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

ul[role='list'],
ol[role='list'] {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.15;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
}

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

::selection {
  background: color-mix(in oklab, var(--color-primary) 25%, transparent);
  color: var(--color-text);
}

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

@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;
  }
}

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

table {
  border-collapse: collapse;
  width: 100%;
}

a,
button,
[role='button'],
[role='link'],
input,
textarea,
select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

.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;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  z-index: 100;
  transition: top 200ms ease;
}

.skip-link:focus {
  top: var(--space-4);
  color: var(--color-text-inverse);
  text-decoration: none;
}