/* ============================================
   Precision Wallpaper Installation
   CSS Custom Properties & Global Styles
   Palette: Warm Graphite + Soft Sage Green
   ============================================ */

:root {
  /* Primary — warm graphite */
  --color-primary: #3B3B3B;
  --color-primary-light: #5A5A5A;
  --color-primary-dark: #2A2A2A;

  /* Accent — soft sage green */
  --color-accent: #7A9E7E;
  --color-accent-light: #A3C4A7;
  --color-accent-dark: #5B7E5F;

  /* Backgrounds */
  --color-bg: #FAFAF7;
  --color-bg-alt: #F2F0EB;
  --color-bg-dark: #2E2E2E;

  /* Text */
  --color-text: #2C2C2C;
  --color-text-light: #6B6B6B;
  --color-text-inverse: #FAFAF7;

  /* Borders & Misc */
  --color-border: #E0DDD6;
  --color-border-dark: #C5C1B8;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --section-padding: 6rem 0;
  --container-max: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* ============================================
   Reset & Base
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input {
  font-family: inherit;
  font-size: inherit;
}

ul {
  list-style: none;
}

/* ============================================
   Utility Classes
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.6;
}

/* Scroll-triggered fade-in */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Header
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-logo img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.header-logo span {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.header-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  position: relative;
  padding: 0.25rem 0;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.header-nav a:hover {
  color: var(--color-primary);
}

.header-nav a:hover::after {
  width: 100%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.header-cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
  color: #fff;
}

.header-cta svg {
  width: 16px;
  height: 16px;
}

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 1100;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile overlay nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(250, 250, 247, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1050;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--color-accent);
}

.mobile-nav .mobile-cta {
  margin-top: 1rem;
  padding: 0.9rem 2rem;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(43, 43, 43, 0.82) 0%,
    rgba(43, 43, 43, 0.55) 50%,
    rgba(43, 43, 43, 0.72) 100%
  );
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 3rem;
  align-items: center;
  padding: 4rem 0;
}

.hero-content {
  color: var(--color-text-inverse);
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-content p {
  font-size: 1.15rem;
  line-height: 1.7;
  opacity: 0.9;
  max-width: 520px;
  margin-bottom: 1.5rem;
}

/* Lead Form Card */
.lead-form-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
}

.lead-form-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 0.5rem;
}

.lead-form-card .form-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.form-group input {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(122, 158, 126, 0.15);
}

.form-group input::placeholder {
  color: var(--color-border-dark);
}

.btn-submit {
  width: 100%;
  padding: 0.9rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  margin-top: 0.5rem;
}

.btn-submit:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(122, 158, 126, 0.3);
}

.btn-submit:active {
  transform: translateY(0);
}

.form-success {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
}

.form-success.show {
  display: block;
}

.form-success svg {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.form-success h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.form-success p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================
   Services Section
   ============================================ */

.services {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.services-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.services-header .section-subtitle {
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.service-card:hover .service-card-img img {
  transform: scale(1.05);
}

.service-card-body {
  padding: 1.5rem;
}

.service-card-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.service-card-body p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================
   Before & After Videos Section
   ============================================ */

.video-section {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.video-section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.video-section-header .section-subtitle {
  margin: 0 auto;
}

.videos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.video-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 9 / 14;
  min-height: 420px;
  background: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.video-card::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(42, 42, 42, 0.08), rgba(42, 42, 42, 0.22)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 34%);
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.video-card video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* ============================================
   How It Works Section
   ============================================ */

.how-it-works {
  padding: var(--section-padding);
  background: var(--color-bg-alt);
}

.how-it-works-header {
  text-align: center;
  margin-bottom: 4rem;
}

.how-it-works-header .section-subtitle {
  margin: 0 auto;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-bottom: 4rem;
  position: relative;
}

.step {
  text-align: center;
  padding: 2rem 1.5rem;
  position: relative;
}

/* Connecting line between steps */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: calc(2rem + 36px);
  right: 0;
  width: calc(100% - 72px);
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-light), var(--color-accent));
  transform: translateX(50%);
  z-index: 0;
}

.step-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: 50%;
  position: relative;
  z-index: 1;
}

.step-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-accent-dark);
}

.step-number {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.how-cta {
  text-align: center;
  padding: 2.5rem;
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.how-cta p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.how-cta .phone-link {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-accent-dark);
  transition: color var(--transition-fast);
}

.how-cta .phone-link:hover {
  color: var(--color-accent);
}

/* ============================================
   Final CTA Section
   ============================================ */

.final-cta {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.final-cta-inner {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 3rem;
  align-items: center;
}

.final-cta-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.final-cta-content p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.final-cta-content .phone-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  transition: color var(--transition-fast);
}

.final-cta-content .phone-link:hover {
  color: var(--color-accent);
}

.final-cta-content .phone-link svg {
  width: 24px;
  height: 24px;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: 3.5rem 0 2rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-info h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-info p {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.8;
}

.footer-info a {
  color: var(--color-accent-light);
  transition: color var(--transition-fast);
}

.footer-info a:hover {
  color: #fff;
}

.footer-links h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.9rem;
  opacity: 0.8;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ============================================
   Floating CTA Button
   ============================================ */

.floating-cta {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 50px;
  box-shadow: var(--shadow-lg);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
  border: none;
}

.floating-cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.floating-cta svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-base);
}

.modal-overlay.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-border);
  color: var(--color-primary);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   Responsive — Tablet (768px)
   ============================================ */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content p {
    margin: 0 auto 1.5rem;
  }

  .lead-form-card {
    max-width: 420px;
    margin: 0 auto;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .videos-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .video-card {
    min-height: 340px;
  }

  .final-cta-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .final-cta-inner .lead-form-card {
    max-width: 420px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 4rem 0;
    --header-height: 64px;
  }

  .header-nav,
  .header-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 2rem);
    padding-bottom: 3rem;
  }

  .hero-inner {
    padding: 2rem 0;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .videos-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .video-card {
    width: min(100%, 420px);
    min-height: 0;
    margin: 0 auto;
  }

  .service-card {
    display: grid;
    grid-template-columns: 120px 1fr;
  }

  .service-card-img {
    height: 100%;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .step:not(:last-child)::after {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .floating-cta span {
    display: none;
  }

  .floating-cta {
    padding: 1rem;
    border-radius: 50%;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.75rem;
  }

  .lead-form-card {
    padding: 1.5rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .modal-content {
    padding: 1.75rem;
  }
}