/* ============================================================
   ALTA VISTA CONCRETE — Preview Build
   Single-page anchor-scroll teaser site.
   Replace placeholders ([Service Area], phone, etc.) on v1 build.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --navy-950: #06182B;
  --navy-900: #0A1F35;
  --navy-800: #0F2942;
  --navy-700: #1A3A5C;
  --navy-600: #25527E;
  --blue-500: #2563EB;
  --blue-400: #3B82F6;
  --blue-100: #DBEAFE;
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --white: #FFFFFF;

  --max-w: 1200px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(10, 31, 53, 0.06);
  --shadow:    0 4px 16px rgba(10, 31, 53, 0.08);
  --shadow-md: 0 8px 30px rgba(10, 31, 53, 0.10);
  --shadow-lg: 0 20px 50px rgba(10, 31, 53, 0.15);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::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: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; transition: color 0.2s var(--ease); }
ul { padding: 0; margin: 0; list-style: none; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: 96px 0; }
@media (max-width: 768px) {
  section { padding: 64px 0; }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  color: var(--gray-900);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
h1 { font-size: clamp(40px, 5.5vw, 68px); font-weight: 900; }
h2 { font-size: clamp(28px, 3.5vw, 44px); }
h3 { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
p  { margin: 0 0 1em; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 16px;
}
.eyebrow-light { color: var(--blue-400); }
.section-head { max-width: 680px; margin-bottom: 64px; }
.section-lede { font-size: 18px; color: var(--gray-600); margin: 0; }
.accent { color: var(--blue-500); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
}
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-primary {
  background: var(--navy-900);
  color: var(--white);
  border-color: var(--navy-900);
}
.btn-primary:hover {
  background: var(--navy-800);
  border-color: var(--navy-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: var(--white);
  color: var(--navy-900);
  border-color: var(--gray-200);
}
.btn-secondary:hover { border-color: var(--navy-900); }
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.3);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.6);
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.nav.is-scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 32px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy-900);
}
.logo-mark { width: 36px; height: 36px; color: var(--navy-900); }
.logo-mark svg { width: 100%; height: 100%; }
.logo-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}
.logo-text strong {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--navy-900);
}
.logo-text em {
  font-style: normal;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.32em;
  color: var(--gray-500);
  margin-top: 3px;
}
.logo-light strong { color: var(--white); }
.logo-light em { color: rgba(255, 255, 255, 0.6); }

.nav-links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
}
.nav-links a:hover { color: var(--navy-900); }

.nav-cta { font-size: 14px; padding: 10px 18px; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy-900);
  border-radius: 2px;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--gray-200);
  background: var(--white);
}
.nav-mobile a {
  padding: 12px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-700);
}
.nav-mobile .btn { margin-top: 12px; }

@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile.is-open { display: flex; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 70%, var(--navy-800) 100%);
  color: var(--white);
  padding: 120px 0 100px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; z-index: -1; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at top, rgba(0,0,0,0.7), transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top, rgba(0,0,0,0.7), transparent 70%);
}
.hero-glow {
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.25) 0%, transparent 60%);
  filter: blur(20px);
}
.hero-inner { position: relative; max-width: 880px; }
.hero-title {
  color: var(--white);
  margin: 0 0 24px;
}
.hero-title .accent { color: var(--blue-400); }
.hero-sub {
  font-size: clamp(17px, 2vw, 21px);
  color: rgba(255, 255, 255, 0.75);
  max-width: 620px;
  margin: 0 0 40px;
  line-height: 1.55;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}
.hero-ctas .btn-primary {
  background: var(--blue-500);
  border-color: var(--blue-500);
}
.hero-ctas .btn-primary:hover {
  background: var(--blue-400);
  border-color: var(--blue-400);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-meta-item { display: flex; flex-direction: column; }
.hero-meta-item strong {
  font-size: 32px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1;
}
.hero-meta-item span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* ============================================================
   TRUST BAR
   ============================================================ */
.trust-bar {
  padding: 28px 0;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.trust-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: center;
  gap: 24px;
}
.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-700);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.trust-item svg { color: var(--blue-500); }

/* ============================================================
   SERVICES
   ============================================================ */
.services { background: var(--white); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.service-card {
  padding: 32px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: all 0.25s var(--ease);
}
.service-card:hover {
  border-color: var(--navy-700);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: var(--navy-900);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 { color: var(--navy-900); margin-bottom: 10px; }
.service-card p { color: var(--gray-600); margin-bottom: 16px; font-size: 15px; }
.service-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
}
.service-list li {
  font-size: 14px;
  color: var(--gray-700);
  padding-left: 18px;
  position: relative;
}
.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-500);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: var(--gray-50); }
.about-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}
.about-text h2 { color: var(--navy-900); }
.about-text p { color: var(--gray-600); font-size: 17px; max-width: 540px; margin-bottom: 32px; }
.values-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}
.values-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.values-list .check {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue-100);
  color: var(--blue-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
.values-list .check svg { width: 14px; height: 14px; }
.values-list strong { display: block; color: var(--navy-900); font-size: 16px; }
.values-list p { font-size: 14px; color: var(--gray-600); margin: 2px 0 0; }

.about-visual {
  position: relative;
  height: 460px;
}
.about-card {
  position: absolute;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  min-width: 220px;
}
.about-card-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 8px;
}
.about-card-stat {
  font-size: 36px;
  font-weight: 800;
  color: var(--navy-900);
  letter-spacing: -0.02em;
  line-height: 1;
}
.about-card-sub {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 8px;
}
.about-card-1 { top: 0; left: 0; transform: rotate(-2deg); }
.about-card-2 {
  top: 130px;
  right: 0;
  transform: rotate(2deg);
  background: var(--navy-900);
}
.about-card-2 .about-card-label { color: var(--blue-400); }
.about-card-2 .about-card-stat { color: var(--white); }
.about-card-2 .about-card-sub { color: rgba(255, 255, 255, 0.6); }
.about-card-3 { bottom: 0; left: 40px; transform: rotate(-1deg); }

@media (max-width: 900px) {
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { height: 380px; max-width: 480px; margin: 0 auto; }
}

/* ============================================================
   STATS
   ============================================================ */
.stats {
  background: var(--navy-900);
  color: var(--white);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.stats::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.stats-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  text-align: center;
}
.stat strong {
  display: block;
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--white);
  line-height: 1;
  margin-bottom: 8px;
}
.stat span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.04em;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact { background: var(--white); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-text h2 { color: var(--navy-900); }
.contact-lede {
  font-size: 17px;
  color: var(--gray-600);
  margin-bottom: 32px;
  max-width: 460px;
}
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.contact-icon {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--gray-100);
  color: var(--navy-900);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.contact-icon svg { width: 18px; height: 18px; }
.contact-list strong {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 4px;
}
.contact-list a, .contact-list span {
  display: block;
  color: var(--navy-900);
  font-weight: 600;
  font-size: 16px;
}
.contact-list a:hover { color: var(--blue-500); }

.contact-form {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-form h3 { color: var(--navy-900); margin-bottom: 6px; }
.form-sub {
  font-size: 14px;
  color: var(--gray-600);
  margin-bottom: 24px;
}
.contact-form label {
  display: block;
  margin-bottom: 16px;
}
.contact-form label > span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-size: 15px;
  color: var(--gray-900);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.contact-form textarea { resize: vertical; min-height: 100px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-note {
  font-size: 12px;
  color: var(--gray-500);
  margin: 12px 0 0;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 2fr;
  gap: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-tag {
  margin: 20px 0 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  max-width: 340px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col strong {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 6px;
}
.footer-col a, .footer-col span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  padding: 24px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
  gap: 12px;
}
.preview-tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(37, 99, 235, 0.15);
  color: var(--blue-400);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .footer-cols { grid-template-columns: 1fr; }
}