/* ============================================
   Water Softener Installation — Wayne PA
   Premium editorial / product-design system
   Mobile-first, smartphone-primary
   ============================================ */

:root {
  /* Color language — water, mineral, clean metal */
  --color-deep: #0B3C4A;
  --color-primary: #0E5A6B;
  --color-accent: #1A9B9B;
  --color-accent-soft: #E6F5F5;
  --color-bg: #F6F8F9;
  --color-surface: #FFFFFF;
  --color-text: #142126;
  --color-text-muted: #4A5C63;
  --color-border: #D8E2E6;
  --color-border-soft: #E8F0F2;
  --color-focus: #1A9B9B;
  --color-cta: #0E5A6B;
  --color-cta-hover: #0B3C4A;

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 5rem;
  --space-12: 6rem;

  /* Layout */
  --max-width: 1120px;
  --max-narrow: 720px;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --header-h: 64px;
  --sticky-cta-h: 64px;

  /* Motion */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration: 0.2s;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}
a:hover { color: var(--color-accent); }
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}
button, .btn {
  font-family: inherit;
  cursor: pointer;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-deep);
  margin: 0 0 var(--space-4);
}
h1 { font-size: clamp(1.85rem, 5vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.4rem); }
p { margin: 0 0 var(--space-4); }
.lead {
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}
.meta {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}
.container--narrow {
  max-width: var(--max-narrow);
}
.section {
  padding: var(--space-8) 0;
}
@media (min-width: 768px) {
  .section { padding: var(--space-10) 0; }
}
.section--tight { padding: var(--space-6) 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 248, 249, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-soft);
  height: var(--header-h);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}
.logo {
  font-weight: 650;
  font-size: 0.95rem;
  color: var(--color-deep);
  text-decoration: none;
  letter-spacing: -0.01em;
  line-height: 1.25;
  max-width: 11rem;
}
.logo:hover { color: var(--color-primary); }
.logo span {
  display: block;
  font-weight: 500;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* Desktop nav */
.nav-desktop {
  display: none;
  align-items: center;
  gap: var(--space-1);
}
.nav-desktop a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}
.nav-desktop a:hover,
.nav-desktop a[aria-current="page"] {
  background: var(--color-accent-soft);
  color: var(--color-primary);
}
.header-cta {
  display: none;
}
@media (min-width: 900px) {
  .nav-desktop { display: flex; }
  .header-cta { display: inline-flex; }
  .menu-toggle { display: none !important; }
  .logo { max-width: none; font-size: 1rem; }
  .logo span { display: inline; margin-left: 0.35em; font-size: 0.85rem; }
}

/* Mobile menu button */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--color-deep);
  border-radius: var(--radius-sm);
  padding: 0;
}
.menu-toggle svg { width: 24px; height: 24px; }

/* Mobile nav drawer */
.nav-mobile {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--color-surface);
  z-index: 99;
  padding: var(--space-5) var(--space-4);
  transform: translateX(100%);
  transition: transform 0.25s var(--ease);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.nav-mobile.is-open {
  transform: translateX(0);
}
.nav-mobile a {
  display: block;
  padding: var(--space-4);
  font-size: 1.125rem;
  font-weight: 550;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius);
  min-height: 48px;
}
.nav-mobile a:hover,
.nav-mobile a[aria-current="page"] {
  background: var(--color-accent-soft);
  color: var(--color-primary);
}
.nav-mobile .nav-phone {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-deep);
  color: #fff !important;
  text-align: center;
  border-radius: var(--radius);
  font-weight: 600;
}
body.menu-open { overflow: hidden; }

/* Buttons / CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  text-decoration: none;
  transition: background var(--duration) var(--ease), transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.btn--primary {
  background: var(--color-cta);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-cta-hover);
  color: #fff;
}
.btn--secondary {
  background: var(--color-surface);
  color: var(--color-deep);
  border: 1.5px solid var(--color-border);
}
.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-accent-soft);
}
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid transparent;
}
.btn--ghost:hover {
  background: var(--color-accent-soft);
}
.btn--lg {
  min-height: 52px;
  padding: 0.85rem 1.6rem;
  font-size: 1.05rem;
}
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Hero — smartphone primary */
.hero {
  position: relative;
  padding: var(--space-7) 0 var(--space-8);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-deep);
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-content .meta {
  margin-bottom: var(--space-3);
  color: var(--color-accent);
}
.hero-content h1 {
  margin-bottom: var(--space-4);
}
.hero-content .lead {
  margin-bottom: var(--space-5);
  max-width: 36ch;
}
@media (min-width: 768px) {
  .hero { padding: var(--space-9) 0 var(--space-10); }
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-8);
  }
  .hero-visual { aspect-ratio: 5 / 4; }
}

/* Content blocks */
.block {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--color-border-soft);
}
.block--accent {
  background: var(--color-accent-soft);
  border-color: transparent;
}
.block--deep {
  background: var(--color-deep);
  color: #E8F0F2;
  border: none;
}
.block--deep h2,
.block--deep h3 { color: #fff; }
.block--deep .lead,
.block--deep p { color: rgba(255,255,255,0.85); }

/* Feature / info cards — restrained */
.info-grid {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .info-grid--2 { grid-template-columns: 1fr 1fr; }
  .info-grid--3 { grid-template-columns: repeat(3, 1fr); }
}
.info-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border-soft);
}
.info-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-2);
}
.info-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Process steps */
.process-list {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-5);
}
.process-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
}
.process-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  font-weight: 650;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.process-item h3 {
  margin-bottom: var(--space-2);
  font-size: 1.1rem;
}
.process-item p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.975rem;
}

/* FAQ accordion */
.faq-list {
  display: grid;
  gap: var(--space-3);
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  min-height: 56px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 550;
  color: var(--color-deep);
  cursor: pointer;
}
.faq-q:hover { background: var(--color-bg); }
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform 0.2s var(--ease);
}
.faq-item[open] .faq-icon,
.faq-item.is-open .faq-icon {
  transform: rotate(45deg);
}
.faq-a {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-muted);
  font-size: 0.975rem;
  display: none;
}
.faq-item.is-open .faq-a,
.faq-item[open] .faq-a {
  display: block;
}

/* Contact area */
.contact-panel {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 768px) {
  .contact-panel {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}
.contact-detail {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.contact-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.contact-row .label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  font-weight: 500;
}
.contact-row a,
.contact-row .value {
  font-size: 1.15rem;
  font-weight: 550;
  color: var(--color-deep);
  text-decoration: none;
}
.contact-row a:hover { color: var(--color-accent); }
.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  aspect-ratio: 4 / 3;
  background: var(--color-border-soft);
}
.map-wrap iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* CTA bands */
.cta-band {
  padding: var(--space-7) 0;
  text-align: center;
}
.cta-band h2 { margin-bottom: var(--space-3); }
.cta-band .lead {
  margin-bottom: var(--space-5);
  max-width: 40ch;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.site-footer {
  background: var(--color-deep);
  color: rgba(255,255,255,0.8);
  padding: var(--space-8) 0 var(--space-6);
  margin-top: var(--space-4);
}
.footer-grid {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}
@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}
.footer-brand {
  font-weight: 650;
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: var(--space-2);
}
.footer-brand span {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
  margin-top: 0.15em;
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-nav a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.25rem 0;
}
.footer-nav a:hover { color: #fff; }
.footer-bottom {
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
}

/* Sticky mobile call bar */
.sticky-call {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--color-deep);
  padding: var(--space-3) var(--space-4);
  padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
  display: flex;
  justify-content: center;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.12);
}
.sticky-call a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  max-width: 400px;
  min-height: 48px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
}
.sticky-call a:hover { background: #158f8f; color: #fff; }
@media (min-width: 900px) {
  .sticky-call { display: none; }
}
/* Space for sticky bar on mobile */
body.has-sticky {
  padding-bottom: calc(var(--sticky-cta-h) + env(safe-area-inset-bottom, 0px));
}

/* Utility */
.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;
}
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Image treatments */
.img-rounded {
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Split editorial section */
.split {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
@media (min-width: 768px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .split--reverse .split-visual { order: 2; }
  .split--reverse .split-content { order: 1; }
}

/* Page title block */
.page-hero {
  padding: var(--space-7) 0 var(--space-6);
}
.page-hero .meta { margin-bottom: var(--space-2); color: var(--color-accent); }
.page-hero h1 { margin-bottom: var(--space-3); }
.page-hero .lead { max-width: 48ch; }

/* Internal link strip */
.link-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.link-strip a {
  font-weight: 550;
  font-size: 0.95rem;
}

/* Prose for longer content */
.prose p { max-width: 65ch; }
.prose ul {
  padding-left: 1.25rem;
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}
.prose li { margin-bottom: var(--space-2); }

/* Symptom / cause visual */
.symptom-grid {
  display: grid;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .symptom-grid { grid-template-columns: 1fr 1fr; }
}
.symptom {
  padding: var(--space-4);
  border-left: 3px solid var(--color-accent);
  background: var(--color-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.symptom strong {
  display: block;
  color: var(--color-deep);
  margin-bottom: var(--space-1);
  font-size: 0.95rem;
}
.symptom span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}