/* ==========================================================================
   Burlington Roof Company — styles.css
   Minimalist, mobile-first. Tokens per DESIGN.md.
   ========================================================================== */

:root {
  /* Surfaces */
  --color-bg:            #ffffff;
  --color-surface:       #f6f8f7;
  --color-surface-2:     #eef2f0;

  /* Text */
  --color-text:          #16211c;
  --color-text-muted:    #556059;
  --color-text-inverse:  #ffffff;

  /* Brand — Vermont evergreen */
  --color-primary:       #1f6a4a;
  --color-primary-hover: #185939;
  --color-primary-dark:  #123f2b;

  /* Accent — warm amber, CTA only */
  --color-accent:        #e8873b;
  --color-accent-hover:  #cf7328;
  --color-accent-ink:    #2a1a09;

  /* Support */
  --color-border:        #dce3df;
  --color-border-strong: #b9c4bd;
  --color-success:       #1f7a4d;
  --color-danger:        #b3261e;
  --color-focus:         #1f6a4a;
  --color-link:          var(--color-primary);
  --color-link-hover:    var(--color-primary-hover);

  /* Fonts */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif,
               "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Type scale */
  --fs-h1:   2.5rem;
  --fs-h2:   2rem;
  --fs-h3:   1.5rem;
  --fs-h4:   1.25rem;
  --fs-h5:   1.0625rem;
  --fs-h6:   0.9375rem;
  --fs-body: 1.0625rem;
  --fs-lead: 1.25rem;
  --fs-small:0.875rem;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;

  --lh-tight:   1.15;
  --lh-heading: 1.25;
  --lh-body:    1.6;

  /* Spacing */
  --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;

  /* Layout */
  --container-max: 1120px;
  --container-pad: var(--space-5);
  --measure:       65ch;
  --section-y:     var(--space-8);
  --section-y-lg:  var(--space-9);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(18,63,43,0.06);
  --shadow-md: 0 4px 16px rgba(18,63,43,0.08);
  --shadow-focus: 0 0 0 3px rgba(31,106,74,0.35);
}

@media (min-width: 768px) {
  :root {
    --fs-h1: 3.5rem;
    --fs-h2: 2.5rem;
    --container-pad: var(--space-6);
    --section-y: var(--section-y-lg);
  }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 { margin: 0 0 var(--space-4); color: var(--color-text); }
h1 { font-size: var(--fs-h1); font-weight: var(--fw-bold); line-height: var(--lh-tight); letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); font-weight: var(--fw-bold); line-height: var(--lh-heading); letter-spacing: -0.01em; }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-semibold); line-height: var(--lh-heading); }
h4 { font-size: var(--fs-h4); font-weight: var(--fw-semibold); line-height: var(--lh-heading); }

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

a { color: var(--color-link); text-decoration: none; }
a:hover { color: var(--color-link-hover); text-decoration: underline; }

img, svg { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

.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: -60px;
  background: var(--color-primary); color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-md);
  z-index: 100; transition: top .15s ease;
}
.skip-link:focus { top: var(--space-3); color: var(--color-text-inverse); text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.icon { width: 24px; height: 24px; flex: none; }

/* Section rhythm */
section { padding-block: var(--section-y); }
.section--surface { background: var(--color-surface); }

.eyebrow {
  display: block;
  font-size: var(--fs-h6);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-head { max-width: var(--measure); margin-bottom: var(--space-7); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head p { color: var(--color-text-muted); font-size: var(--fs-lead); margin-bottom: 0; }

.lead { font-size: var(--fs-lead); color: var(--color-text-muted); max-width: var(--measure); }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: inherit; font-size: var(--fs-body); font-weight: var(--fw-semibold);
  padding: var(--space-3) var(--space-5); min-height: 48px;
  border-radius: var(--radius-md); border: 1px solid transparent;
  cursor: pointer; text-decoration: none; line-height: 1;
  transition: background-color .15s ease, border-color .15s ease, transform .05s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn[disabled], .btn.is-loading { opacity: .6; cursor: not-allowed; }

.btn--primary { background: var(--color-accent); color: var(--color-accent-ink); }
.btn--primary:hover { background: var(--color-accent-hover); color: var(--color-accent-ink); }

.btn--secondary {
  background: transparent; color: var(--color-primary);
  border: 1.5px solid var(--color-border-strong);
}
.btn--secondary:hover { background: var(--color-surface-2); border-color: var(--color-primary); color: var(--color-primary); }

.btn--block { width: 100%; }
.btn--compact { min-height: 44px; padding: var(--space-2) var(--space-4); }
.btn .icon { width: 20px; height: 20px; }

.btn .spinner { display: none; width: 18px; height: 18px; animation: spin .7s linear infinite; }
.btn.is-loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------------------------------------------------
   Header / Nav
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: var(--space-4);
}
@media (min-width: 768px) { .site-header .container { height: 72px; } }

.brand { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: var(--fw-bold); color: var(--color-text); font-size: var(--fs-h5); }
.brand:hover { color: var(--color-text); text-decoration: none; }
.brand .icon { color: var(--color-primary); width: 26px; height: 26px; }
.brand strong { font-weight: var(--fw-bold); }

.nav { display: none; align-items: center; gap: var(--space-5); }
.nav a { color: var(--color-text-muted); font-weight: var(--fw-medium); }
.nav a:hover { color: var(--color-text); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.header-cta { display: none; }

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; padding: 0;
  background: transparent; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  color: var(--color-text); cursor: pointer;
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.mobile-menu {
  display: none;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.mobile-menu.is-open { display: block; }
.mobile-menu ul { display: flex; flex-direction: column; padding-block: var(--space-4); gap: var(--space-1); }
.mobile-menu a {
  display: block; padding: var(--space-3) 0; color: var(--color-text); font-weight: var(--fw-medium);
}
.mobile-menu .btn { margin-top: var(--space-3); }

@media (min-width: 900px) {
  .nav { display: flex; }
  .header-cta { display: inline-flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; padding-top: var(--space-8); padding-bottom: var(--space-8); }
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: var(--space-8); } }

.hero h1 { margin-bottom: var(--space-4); }
.hero .lead { margin-bottom: var(--space-6); }

.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-5); }
@media (max-width: 479px) { .hero-cta .btn { width: 100%; } }

.trust-strip {
  display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5);
  font-size: var(--fs-small); color: var(--color-text-muted);
}
.trust-strip li { display: inline-flex; align-items: center; gap: var(--space-2); }
.trust-strip .icon { width: 18px; height: 18px; color: var(--color-success); }

/* Hero mountain ridge */
.hero-ridge {
  position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 120px;
  color: var(--color-surface-2); z-index: 0; pointer-events: none;
}
.hero-ridge svg { width: 100%; height: 100%; }

/* --------------------------------------------------------------------------
   Estimate form card
   -------------------------------------------------------------------------- */
.estimate-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-md);
}
.estimate-card h2 { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.estimate-card .form-intro { color: var(--color-text-muted); font-size: var(--fs-small); margin-bottom: var(--space-5); }

.form-row { display: grid; gap: var(--space-4); }
@media (min-width: 560px) { .form-row.two { grid-template-columns: 1fr 1fr; } }

.field { margin-bottom: var(--space-4); }
.field label { display: block; font-size: var(--fs-small); font-weight: var(--fw-medium); margin-bottom: var(--space-2); }
.field .req { color: var(--color-danger); }

.field input, .field textarea, .field select {
  width: 100%; min-height: 48px; padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border-strong); border-radius: var(--radius-md);
  background: var(--color-bg); font-family: inherit; font-size: var(--fs-body); color: var(--color-text);
}
.field textarea { min-height: 96px; resize: vertical; line-height: var(--lh-body); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--color-primary); box-shadow: var(--shadow-focus);
}
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--color-danger); }
.field-error { display: block; color: var(--color-danger); font-size: var(--fs-small); margin-top: var(--space-2); min-height: 0; }

/* honeypot */
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-reassure { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: var(--space-4); text-align: center; }

.form-success { text-align: center; padding: var(--space-5) 0; }
.form-success .icon { width: 48px; height: 48px; color: var(--color-success); margin: 0 auto var(--space-4); }
.form-success h3 { margin-bottom: var(--space-2); }
.form-success p { color: var(--color-text-muted); margin: 0; }
.is-hidden { display: none !important; }

/* --------------------------------------------------------------------------
   3-Step Process
   -------------------------------------------------------------------------- */
.steps-grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.step-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  transition: box-shadow .15s ease, transform .15s ease;
}
.step-card:hover { box-shadow: var(--shadow-sm); }
.step-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-pill);
  background: var(--color-primary); color: var(--color-text-inverse);
  font-weight: var(--fw-bold); font-size: var(--fs-h5); margin-bottom: var(--space-4);
}
.step-card .step-icon { color: var(--color-primary); width: 32px; height: 32px; margin-bottom: var(--space-3); }
.step-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-2); }
.step-card p { color: var(--color-text-muted); margin: 0; }

/* --------------------------------------------------------------------------
   Value / Pricing band (dark green)
   -------------------------------------------------------------------------- */
.value-band { background: var(--color-primary-dark); color: var(--color-text-inverse); }
.value-band h2, .value-band h3 { color: var(--color-text-inverse); }
.value-grid { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 768px) { .value-grid { grid-template-columns: 1.1fr 0.9fr; gap: var(--space-8); } }
.value-band .lead { color: #d6e6dd; }
.value-band .btn--secondary { color: var(--color-text-inverse); border-color: rgba(255,255,255,0.4); }
.value-band .btn--secondary:hover { background: rgba(255,255,255,0.08); border-color: var(--color-text-inverse); color: var(--color-text-inverse); }

.why-list { display: grid; gap: var(--space-4); }
.why-list li { display: flex; align-items: flex-start; gap: var(--space-3); }
.why-list .icon { color: var(--color-accent); width: 22px; height: 22px; margin-top: 2px; }
.why-list strong { color: var(--color-text-inverse); font-weight: var(--fw-semibold); display: block; }
.why-list span { color: #cddccf; font-size: var(--fs-small); }

.price-beat {
  display: flex; align-items: center; gap: var(--space-3);
  margin: var(--space-5) 0 var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(143,208,171,0.35);
  border-radius: var(--radius-md);
}
.price-beat .icon { color: var(--color-accent); width: 28px; height: 28px; flex: none; }
.price-beat p { margin: 0; font-size: var(--fs-h5); color: var(--color-text-inverse); }
.price-beat strong { color: var(--color-text-inverse); font-weight: var(--fw-bold); }
.price-fine { font-size: var(--fs-small); color: #cddccf; }

/* --------------------------------------------------------------------------
   Feature cards
   -------------------------------------------------------------------------- */
.features-grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.feature-card {
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-5); background: var(--color-bg);
}
.feature-card .icon { color: var(--color-primary); width: 30px; height: 30px; margin-bottom: var(--space-3); }
.feature-card h4 { margin-bottom: var(--space-2); }
.feature-card p { color: var(--color-text-muted); margin: 0; font-size: var(--fs-body); }

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */
.testimonials-grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.testimonial {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
}
.stars { display: inline-flex; gap: 2px; color: var(--color-accent); margin-bottom: var(--space-3); }
.stars .icon { width: 18px; height: 18px; }
.testimonial blockquote { margin: 0 0 var(--space-4); font-size: var(--fs-h5); color: var(--color-text); line-height: var(--lh-body); }
.testimonial cite { font-style: normal; font-size: var(--fs-small); color: var(--color-text-muted); font-weight: var(--fw-medium); }

/* --------------------------------------------------------------------------
   Services / SEO content
   -------------------------------------------------------------------------- */
.services-grid { display: grid; gap: var(--space-7); }
@media (min-width: 768px) { .services-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); } }
.services-list { display: grid; gap: var(--space-3); }
.services-list li { display: flex; align-items: flex-start; gap: var(--space-3); color: var(--color-text-muted); }
.services-list .icon { color: var(--color-success); width: 20px; height: 20px; margin-top: 3px; }
.services-list strong { color: var(--color-text); font-weight: var(--fw-semibold); }
.prose p { color: var(--color-text-muted); max-width: var(--measure); }
.prose h3 { margin-top: var(--space-5); }

/* --------------------------------------------------------------------------
   Lead form section
   -------------------------------------------------------------------------- */
.lead-section .lead-grid { display: grid; gap: var(--space-7); align-items: start; }
@media (min-width: 768px) { .lead-section .lead-grid { grid-template-columns: 0.9fr 1.1fr; gap: var(--space-8); } }
.lead-section .estimate-card { box-shadow: var(--shadow-md); }

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq { max-width: 760px; margin-inline: auto; }
.faq details { border-bottom: 1px solid var(--color-border); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) var(--space-3); cursor: pointer; list-style: none;
  font-weight: var(--fw-semibold); color: var(--color-text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { background: var(--color-surface); }
.faq summary .icon { color: var(--color-primary); transition: transform .2s ease; flex: none; }
.faq details[open] summary .icon { transform: rotate(180deg); }
.faq .faq-body { padding: 0 var(--space-3) var(--space-5); color: var(--color-text-muted); }
.faq .faq-body p { margin: 0; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer { background: var(--color-primary-dark); color: var(--color-text-inverse); padding-block: var(--space-8); }
.footer-grid { display: grid; gap: var(--space-6); }
@media (min-width: 640px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.site-footer h4 { color: var(--color-text-inverse); font-size: var(--fs-h6); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--space-4); }
.site-footer p, .site-footer address { color: #cfe3d8; font-style: normal; margin: 0 0 var(--space-2); font-size: var(--fs-small); line-height: var(--lh-body); }
.site-footer a { color: #cfe3d8; }
.site-footer a:hover { color: var(--color-text-inverse); }
.site-footer .footer-brand { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: var(--fw-bold); color: var(--color-text-inverse); font-size: var(--fs-h5); margin-bottom: var(--space-3); }
.site-footer .footer-brand .icon { color: #cfe3d8; }
.footer-links { display: grid; gap: var(--space-2); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15); margin-top: var(--space-7); padding-top: var(--space-5);
  display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: space-between;
  font-size: var(--fs-small); color: #cfe3d8;
}

/* --------------------------------------------------------------------------
   Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}