/* ==========================================================================
   Mike Vasquez Real Estate — Design System
   Barrett Real Estate | Sun City, AZ corridor | 55+ seller specialist
   --------------------------------------------------------------------------
   Design intent: calm, credible, unhurried. Built for a 55+ audience, so
   legibility and contrast are functional requirements. All body text
   combinations meet or exceed WCAG 2.1 AA (4.5:1). Tap targets >= 48x48px.
   ========================================================================== */

:root {
  /* Brand */
  --color-primary:        #0B5563;
  --color-primary-hover:  #08414C;
  --color-primary-tint:   #E4EEF0;
  --color-secondary:      #B7862F;
  --color-secondary-hover:#8E671F;
  --color-accent:         #A8432A;
  --color-accent-hover:   #8A3521;

  /* Neutrals (warm-gray family, 5 steps) */
  --neutral-50:           #F8F7F4;
  --neutral-100:          #EAE7E0;
  --neutral-300:          #C3BFB5;
  --neutral-600:          #55524B;
  --neutral-900:          #1C2B33;

  /* Semantic surfaces */
  --color-bg:             var(--neutral-50);
  --color-surface:        #FFFFFF;
  --color-text:           var(--neutral-900);
  --color-text-muted:     var(--neutral-600);
  --color-border:         var(--neutral-100);

  /* Status */
  --color-success:        #1E7A46;
  --color-success-tint:   #E4F3EA;
  --color-error:          #B3261E;
  --color-error-tint:     #FBE8E7;

  /* Text on brand fills */
  --on-primary:           #FFFFFF;
  --on-accent:            #FFFFFF;
  --on-secondary:         #1C2B33;

  /* Type scale (base 18px, line-height 1.6) */
  --font-heading: "Lora", Georgia, "Times New Roman", serif;
  --font-body:    "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --text-xs:   0.875rem;
  --text-sm:   1rem;
  --text-base: 1.125rem;
  --text-lg:   1.25rem;
  --text-xl:   1.5rem;
  --text-2xl:  1.875rem;
  --text-3xl:  2.375rem;
  --text-4xl:  3rem;
  --leading-body:    1.6;
  --leading-heading: 1.2;
  --leading-tight:   1.1;
  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  /* Spacing (4px grid) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.5rem;
  --space-6:  2rem;
  --space-7:  3rem;
  --space-8:  4rem;
  --space-9:  6rem;

  /* Radii */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   14px;
  --radius-full: 999px;

  /* Shadows (soft, tinted to ground) */
  --shadow-sm: 0 1px 2px rgba(28, 43, 51, 0.08);
  --shadow-md: 0 4px 12px rgba(28, 43, 51, 0.10);
  --shadow-lg: 0 12px 28px rgba(28, 43, 51, 0.14);

  /* Layout */
  --container-max: 1200px;
  --content-max:   72ch;
  --tap-min:       48px;
  --transition: 150ms ease;
}

/* BASE */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: var(--weight-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: var(--leading-heading);
  color: var(--color-text);
  margin: 0 0 var(--space-4);
  font-weight: var(--weight-semibold);
}
h1 { font-size: var(--text-4xl); line-height: var(--leading-tight); letter-spacing: -0.01em; }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
p, ul, ol { margin: 0 0 var(--space-5); max-width: var(--content-max); }
p { font-size: var(--text-base); }
.lead { font-size: var(--text-lg); color: var(--color-text); }
small, .text-sm { font-size: var(--text-sm); }
.text-muted { color: var(--color-text-muted); }
a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--color-primary-hover); }
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
img { max-width: 100%; height: auto; display: block; }
.container { width: 100%; max-width: var(--container-max); margin-inline: auto; padding-inline: var(--space-5); }
.section { padding-block: var(--space-8); }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--tap-min); min-width: var(--tap-min);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body); font-size: var(--text-base); font-weight: var(--weight-semibold);
  line-height: 1.2; text-decoration: none;
  border: 2px solid transparent; border-radius: var(--radius-md); cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn:focus-visible { outline: 3px solid var(--color-text); outline-offset: 3px; }
.btn-primary { background: var(--color-primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--on-primary); }
.btn-accent { background: var(--color-accent); color: var(--on-accent); }
.btn-accent:hover { background: var(--color-accent-hover); color: var(--on-accent); }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-tint); color: var(--color-primary-hover); }
.btn-block { width: 100%; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--neutral-100); color: var(--neutral-300); border-color: var(--neutral-100); cursor: not-allowed; }

/* FORMS */
.form-group { margin-bottom: var(--space-5); }
.form-label { display: block; font-size: var(--text-base); font-weight: var(--weight-semibold); color: var(--color-text); margin-bottom: var(--space-2); }
.form-label .required { color: var(--color-error); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
  display: block; width: 100%; min-height: var(--tap-min);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body); font-size: var(--text-base); line-height: 1.5;
  color: var(--color-text); background: var(--color-surface);
  border: 2px solid var(--neutral-300); border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-textarea { min-height: 8rem; resize: vertical; }
.form-input::placeholder, .form-textarea::placeholder { color: var(--neutral-600); opacity: 1; }
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(11, 85, 99, 0.25); }
.form-input[aria-invalid="true"], .form-textarea[aria-invalid="true"] { border-color: var(--color-error); }
.form-help { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); }
.form-error { font-size: var(--text-sm); color: var(--color-error); margin-top: var(--space-2); font-weight: var(--weight-medium); }
.form-check { display: flex; align-items: flex-start; gap: var(--space-3); min-height: var(--tap-min); }
.form-check input[type="checkbox"], .form-check input[type="radio"] { width: 24px; height: 24px; margin-top: 2px; accent-color: var(--color-primary); flex: 0 0 auto; }

/* CARDS */
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; transition: box-shadow var(--transition), transform var(--transition); }
.card:hover { box-shadow: var(--shadow-md); }
.card-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.card-body { padding: var(--space-5); }
.card-title { font-size: var(--text-xl); margin-bottom: var(--space-2); }
.card-meta { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-3); }
.card-link { display: block; text-decoration: none; color: inherit; }
.card-link:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }

/* UTILITIES */
.bg-primary-tint { background: var(--color-primary-tint); }
.bg-surface { background: var(--color-surface); }
.text-center { text-align: center; }
.stack > * + * { margin-top: var(--space-4); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: var(--space-4); top: -100px; background: var(--color-primary); color: var(--on-primary); padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); z-index: 1000; transition: top var(--transition); }
.skip-link:focus { top: var(--space-4); }

/* RESPONSIVE TYPE */
@media (max-width: 640px) {
  :root { --text-4xl: 2.25rem; --text-3xl: 1.75rem; --text-2xl: 1.5rem; }
  .section { padding-block: var(--space-7); }
}