/* ============================================================
   BASE.CSS — PrecisionEyeSurgery.ca
   Design: Clean medical trust. Deep navy authority + warm gold
   accent. Crisp white space. Premium clinical.
   ============================================================ */

/* ── Custom Palette ── */
:root, [data-theme="light"] {
  /* Surfaces */
  --color-bg:              #f8f9fb;
  --color-surface:         #ffffff;
  --color-surface-2:       #f1f4f8;
  --color-surface-offset:  #e8edf4;
  --color-surface-offset-2:#dde4ef;
  --color-surface-dynamic: #cdd6e8;
  --color-divider:         #d0d8e8;
  --color-border:          #c4cedd;

  /* Text */
  --color-text:            #0f1a2e;
  --color-text-muted:      #4a5a72;
  --color-text-faint:      #8fa0b8;
  --color-text-inverse:    #f8f9fb;

  /* Primary — Deep Navy */
  --color-primary:         #0d3b6e;
  --color-primary-hover:   #0a2d55;
  --color-primary-active:  #071e3a;
  --color-primary-highlight: #d0ddf0;

  /* Accent — Warm Gold (CTAs, highlights) */
  --color-accent:          #c8912a;
  --color-accent-hover:    #a97420;
  --color-accent-active:   #8a5a18;
  --color-accent-highlight:#f7edda;

  /* Functional */
  --color-success:         #2a7a4a;
  --color-success-highlight: #d4eedd;
  --color-error:           #9b2335;
  --color-error-highlight: #fde8ec;
  --color-warning:         #b35e1a;
  --color-warning-highlight: #fdebd5;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(13, 59, 110, 0.08);
  --shadow-md: 0 4px 16px rgba(13, 59, 110, 0.10);
  --shadow-lg: 0 12px 40px rgba(13, 59, 110, 0.13);

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

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

  /* 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);

  /* 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;

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

[data-theme="dark"] {
  --color-bg:              #0a0f1a;
  --color-surface:         #0f1624;
  --color-surface-2:       #141d2e;
  --color-surface-offset:  #19243a;
  --color-surface-offset-2:#1e2a44;
  --color-surface-dynamic: #253352;
  --color-divider:         #1e2b42;
  --color-border:          #2a3a56;
  --color-text:            #e0e8f4;
  --color-text-muted:      #7a94b8;
  --color-text-faint:      #3d5272;
  --color-text-inverse:    #0a0f1a;
  --color-primary:         #5b8fd4;
  --color-primary-hover:   #4a78c0;
  --color-primary-active:  #3960a8;
  --color-primary-highlight: #1a2a48;
  --color-accent:          #e8aa50;
  --color-accent-hover:    #d49440;
  --color-accent-active:   #b87c30;
  --color-accent-highlight: #2e2210;
  --color-success:         #4caf78;
  --color-success-highlight: #132a20;
  --color-error:           #e05068;
  --color-error-highlight: #2a0f14;
  --color-warning:         #e09050;
  --color-warning-highlight: #2a1a08;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:              #0a0f1a;
    --color-surface:         #0f1624;
    --color-surface-2:       #141d2e;
    --color-surface-offset:  #19243a;
    --color-surface-offset-2:#1e2a44;
    --color-surface-dynamic: #253352;
    --color-divider:         #1e2b42;
    --color-border:          #2a3a56;
    --color-text:            #e0e8f4;
    --color-text-muted:      #7a94b8;
    --color-text-faint:      #3d5272;
    --color-text-inverse:    #0a0f1a;
    --color-primary:         #5b8fd4;
    --color-primary-hover:   #4a78c0;
    --color-primary-active:  #3960a8;
    --color-primary-highlight: #1a2a48;
    --color-accent:          #e8aa50;
    --color-accent-hover:    #d49440;
    --color-accent-active:   #b87c30;
    --color-accent-highlight: #2e2210;
  }
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -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: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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: 1.2; font-family: var(--font-display); }
p, li, figcaption { text-wrap: pretty; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

::selection { background: color-mix(in oklab, var(--color-primary) 20%, transparent); }

: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;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

a, button, [role="button"], input, textarea, select {
  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;
}

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

section { padding-block: clamp(var(--space-12), 7vw, var(--space-32)); }

/* ── Button System ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}
/* Hero ghost button refinement */
.btn-secondary--hero {
  padding: 18px 32px;
  font-weight: 600;
}
.btn-white {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn-white:hover {
  background: var(--color-surface-offset);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ── Card ── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

/* ── Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── Section Label ── */
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

/* ── Divider ── */
hr {
  border: none;
  border-top: 1px solid rgba(200, 145, 42, 0.2);
  margin-block: var(--space-8);
}

/* ── Section Micro-Label ── */
.section-micro-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  opacity: 0.85;
  margin-bottom: var(--space-2);
}