/* ===========================
   BASE RESET & DESIGN TOKENS
   =========================== */

:root {
  /* Type Scale */
  --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,    8rem);

  /* 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: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(10, 20, 35, 0.07);
  --shadow-md: 0 4px 16px rgba(10, 20, 35, 0.10);
  --shadow-lg: 0 12px 40px rgba(10, 20, 35, 0.14);

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

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

  /* Fonts */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
}

/* LIGHT MODE — Medical Navy + Gold palette */
:root, [data-theme="light"] {
  --color-bg:              #f4f6f9;
  --color-surface:         #ffffff;
  --color-surface-2:       #f9fafc;
  --color-surface-offset:  #edf0f5;
  --color-divider:         #dde2ea;
  --color-border:          #cdd4df;

  --color-text:            #0e1724;
  --color-text-muted:      #506280;
  --color-text-faint:      #94a3b8;
  --color-text-inverse:    #ffffff;

  /* Deep Navy primary */
  --color-primary:         #1b2d4f;
  --color-primary-hover:   #142239;
  --color-primary-active:  #0d1929;
  --color-primary-highlight: #dce4f0;

  /* Gold accent */
  --color-accent:          #b08d3c;
  --color-accent-hover:    #8f6f29;
  --color-accent-light:    #f5edda;
  --color-accent-border:   #d4ae6a;

  /* Medical teal for highlights */
  --color-teal:            #1e7a8c;
  --color-teal-hover:      #165f6e;
  --color-teal-light:      #e0f3f6;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg:              #0c1220;
  --color-surface:         #111c30;
  --color-surface-2:       #162238;
  --color-surface-offset:  #0f1929;
  --color-divider:         #1e2d45;
  --color-border:          #243552;

  --color-text:            #dce6f5;
  --color-text-muted:      #8ba3c7;
  --color-text-faint:      #4d6080;
  --color-text-inverse:    #0c1220;

  --color-primary:         #6b9be0;
  --color-primary-hover:   #4d82d4;
  --color-primary-active:  #3a6bb5;
  --color-primary-highlight: #1e2d45;

  --color-accent:          #d4ae6a;
  --color-accent-hover:    #c49950;
  --color-accent-light:    #1e2a14;
  --color-accent-border:   #8f6f29;

  --color-teal:            #4db8cc;
  --color-teal-hover:      #35a3ba;
  --color-teal-light:      #112030;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0c1220;
    --color-surface:         #111c30;
    --color-surface-2:       #162238;
    --color-surface-offset:  #0f1929;
    --color-divider:         #1e2d45;
    --color-border:          #243552;
    --color-text:            #dce6f5;
    --color-text-muted:      #8ba3c7;
    --color-text-faint:      #4d6080;
    --color-text-inverse:    #0c1220;
    --color-primary:         #6b9be0;
    --color-primary-hover:   #4d82d4;
    --color-primary-active:  #3a6bb5;
    --color-primary-highlight: #1e2d45;
    --color-accent:          #d4ae6a;
    --color-accent-hover:    #c49950;
    --color-accent-light:    #1e2a14;
    --color-accent-border:   #8f6f29;
    --color-teal:            #4db8cc;
    --color-teal-hover:      #35a3ba;
    --color-teal-light:      #112030;
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 0.3s ease, color 0.3s ease;
}

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 {
  font-family: var(--font-display);
  text-wrap: balance;
  line-height: 1.15;
}

p, li, figcaption { text-wrap: pretty; }

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  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; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"] {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              opacity 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;
}

/* Utility */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 5vw, var(--space-16));
}

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

.section-pad {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}