/* ==========================================================================
   STM Development LLC — Design System
   Tone: Warm | Rhythm: Standard | Photography: Balanced
   Palette grounded in the stucco/desert jobsite photography.
   ========================================================================== */

:root {
  /* Colors */
  --color-primary: #044dc2;      /* denim blue — brand, header, links */
  --color-primary-dark: #033a94;
  --color-accent: #a85a32;       /* terracotta/rust, pulled from stucco photos */
  --color-accent-dark: #8c4826;
  --color-cream: #f5f4f0;        /* warm neutral background */
  --color-cream-deep: #ebe8e0;
  --color-ink: #2b2420;          /* warm near-black for text */
  --color-ink-soft: #5a5248;
  --color-border: #dcd6c9;
  --color-white: #ffffff;

  /* Type */
  --font-head: "DM Serif Display", Georgia, serif;
  --font-body: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Type scale */
  --step-1: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
  --step-2: clamp(1.05rem, 1rem + 0.3vw, 1.15rem);
  --step-3: clamp(1.3rem, 1.2rem + 0.5vw, 1.6rem);
  --step-4: clamp(1.7rem, 1.5rem + 1vw, 2.2rem);
  --step-5: clamp(2.2rem, 1.9rem + 1.8vw, 3.2rem);
  --step-6: clamp(2.6rem, 2.1rem + 2.6vw, 4rem);

  /* Layout */
  --container: 1180px;
  --container-narrow: 760px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --radius: 3px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-cream);
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  color: var(--color-ink);
}
h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-5); }
h3 { font-size: var(--step-4); }
h4 { font-size: var(--step-3); }
p { margin: 0 0 var(--space-2); max-width: 65ch; }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Layout primitives ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.section {
  padding: var(--space-6) 0;
}
.section-tight {
  padding: var(--space-5) 0;
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: center;
}
.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-cards { grid-template-columns: 1fr; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--step-2);
  padding: 0.9rem 1.8rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  text-decoration: none;
}
.btn-outline {
  background: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}
.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
}
.btn-outline-dark {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline-dark:hover {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  gap: var(--space-3);
}
.site-logo img {
  height: 48px;
  width: auto;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.main-nav > ul {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  position: relative;
}
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  color: var(--color-ink);
  font-weight: 700;
  font-size: var(--step-1);
  padding: 0.5rem 0;
  display: inline-block;
}
.main-nav > ul > li > a:hover { color: var(--color-primary); text-decoration: none; }

.dropdown-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-width: 280px;
  max-height: 420px;
  overflow-y: auto;
  padding: var(--space-2);
  box-shadow: 0 12px 24px rgba(43,36,32,0.12);
}
.main-nav > ul > li:hover .dropdown-panel,
.main-nav > ul > li:focus-within .dropdown-panel {
  display: block;
}
.dropdown-panel a {
  display: block;
  padding: 0.4rem 0.5rem;
  color: var(--color-ink);
  font-size: var(--step-1);
  border-radius: var(--radius);
}
.dropdown-panel a:hover {
  background: var(--color-cream);
  color: var(--color-primary);
  text-decoration: none;
}
.dropdown-panel .col-heading {
  font-weight: 700;
  color: var(--color-ink-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.5rem 0.5rem 0.2rem;
}

.header-cta { display: flex; align-items: center; gap: var(--space-3); }
.header-phone {
  font-weight: 700;
  color: var(--color-ink);
  font-size: var(--step-2);
  white-space: nowrap;
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
}
.mobile-menu-btn svg { width: 28px; height: 28px; }

@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .header-phone { display: none; }
}

/* Mobile nav — appended outside header to avoid backdrop-filter containing-block bugs */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 86%;
  max-width: 360px;
  height: 100%;
  background: var(--color-white);
  z-index: 100;
  overflow-y: auto;
  transition: right 0.25s ease;
  box-shadow: -8px 0 24px rgba(0,0,0,0.15);
}
.mobile-nav.open { right: 0; }
.mobile-nav-inner { padding: var(--space-3); }
.mobile-nav-close {
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  float: right;
  color: var(--color-ink);
}
.mobile-nav ul { list-style: none; margin-top: var(--space-4); }
.mobile-nav li { border-bottom: 1px solid var(--color-border); }
.mobile-nav li a {
  display: block;
  padding: 0.8rem 0.2rem;
  color: var(--color-ink);
  font-weight: 700;
}
.mobile-nav details summary {
  padding: 0.8rem 0.2rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}
.mobile-nav details[open] summary { color: var(--color-primary); }
.mobile-nav details ul { margin: 0 0 0.5rem 0.8rem; }
.mobile-nav details ul li { border-bottom: none; }
.mobile-nav details ul li a { font-weight: 400; padding: 0.5rem 0.2rem; }
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(43,36,32,0.4);
  z-index: 90;
}
.mobile-nav-overlay.open { display: block; }

/* ---------- Hero ---------- */
.hero {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-6) 0 var(--space-5);
  position: relative;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: center;
}
.hero-eyebrow-free {
  color: var(--color-cream);
  opacity: 0.85;
  font-weight: 700;
  font-size: var(--step-1);
  margin-bottom: var(--space-1);
}
.hero h1 {
  color: var(--color-white);
  font-size: var(--step-6);
  margin-bottom: var(--space-3);
}
.hero p.supporting {
  color: var(--color-cream);
  font-size: var(--step-3);
  max-width: 40ch;
}
.hero-photo {
  border-radius: var(--radius);
  overflow: hidden;
}
.hero-photo img { width: 100%; height: 100%; object-fit: cover; }
.hero-actions { margin-top: var(--space-3); display: flex; gap: var(--space-2); flex-wrap: wrap; }
@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
}

/* Mesa divider — the one signature decorative move, used once */
.mesa-divider {
  width: 100%;
  height: 28px;
  display: block;
}

/* ---------- Trust strip ---------- */
.trust-strip {
  background: var(--color-cream-deep);
  border-bottom: 1px solid var(--color-border);
}
.trust-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.trust-item { text-align: center; }
.trust-item .trust-value {
  font-family: var(--font-head);
  font-size: var(--step-4);
  color: var(--color-primary);
  display: block;
}
.trust-item .trust-label {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
@media (max-width: 700px) {
  .trust-strip .container { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Services grid ---------- */
.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  height: 100%;
}
.service-card h4 { font-size: var(--step-3); margin-bottom: 0.5rem; }
.service-card h4 a { color: var(--color-ink); }
.service-card h4 a:hover { color: var(--color-primary); text-decoration: none; }
.service-card p { margin: 0; color: var(--color-ink-soft); font-size: var(--step-1); }
.category-label {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.8rem;
  margin-bottom: var(--space-1);
}

/* ---------- Case study preview ---------- */
.case-study-preview {
  background: var(--color-white);
}
.case-study-photo { border-radius: var(--radius); overflow: hidden; }
.case-study-photo img { width: 100%; }

/* ---------- Testimonials ---------- */
.testimonial-card {
  background: var(--color-white);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-3);
  border-radius: var(--radius);
  height: 100%;
}
.testimonial-card p.quote {
  font-family: var(--font-head);
  font-size: var(--step-3);
  color: var(--color-ink);
  margin-bottom: var(--space-2);
}
.testimonial-card .reviewer {
  font-weight: 700;
  color: var(--color-ink-soft);
  font-size: var(--step-1);
}
.placeholder-box {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  text-align: center;
  color: var(--color-ink-soft);
  background: var(--color-cream-deep);
}

/* ---------- Process ---------- */
.process-step { display: flex; gap: var(--space-2); align-items: flex-start; }
.process-num {
  font-family: var(--font-head);
  font-size: var(--step-4);
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
  min-width: 2.2ch;
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) 0;
}
.faq-item summary {
  font-weight: 700;
  cursor: pointer;
  font-size: var(--step-2);
  padding-right: var(--space-3);
}
.faq-item[open] summary { color: var(--color-primary); }
.faq-item p { margin-top: var(--space-2); color: var(--color-ink-soft); }
.faq-category-heading {
  font-family: var(--font-head);
  color: var(--color-primary);
  margin-top: var(--space-4);
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-accent);
  color: var(--color-white);
  text-align: center;
}
.cta-band h2 { color: var(--color-white); }
.cta-band p { color: var(--color-cream); margin: 0 auto var(--space-3); }

/* ---------- Contact form placeholder ---------- */
.form-placeholder {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-cream-deep);
  color: var(--color-ink-soft);
  text-align: center;
  font-weight: 700;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-cream);
  padding: var(--space-6) 0 var(--space-3);
}
.site-footer a { color: var(--color-cream); }
.site-footer h5 {
  font-family: var(--font-body);
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 0.4rem; font-size: var(--step-1); }
.footer-logo img { height: 40px; margin-bottom: var(--space-2); filter: brightness(0) invert(1); }
.footer-nap p { font-size: var(--step-1); margin-bottom: 0.3rem; }
.footer-map iframe {
  width: 100%;
  height: 220px;
  border: 0;
  border-radius: var(--radius);
}
.footer-bottom {
  border-top: 1px solid rgba(245,244,240,0.15);
  padding-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-cream-deep);
}
.footer-bottom a { color: var(--color-cream-deep); }
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 500px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-0 { margin-top: 0; }
.section-intro { max-width: 640px; margin: 0 auto var(--space-4); text-align: center; }
.section-intro h2 { margin-bottom: var(--space-1); }
.section-intro p { margin: 0 auto; color: var(--color-ink-soft); }