/* ============================================
   ARC Surface Solutions - Stylesheet
   Premium Mobile Laser Cleaning
   ============================================ */

:root {
  --black: #0A0A0A;
  --dark: #141414;
  --dark-alt: #1C1C1C;
  --white: #FFFFFF;
  --off-white: #F5F5F0;
  --green: #4A7C59;
  --green-dark: #3A6147;
  --text-light: #F5F5F5;
  --text-dark: #1A1A1A;
  --text-muted: #8A8A8A;
  --text-muted-dark: #6B6B6B;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --section-padding: 100px 0;
  --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
}

p {
  font-size: 1.05rem;
  color: var(--text-muted-dark);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding);
}

.section-dark {
  background: var(--black);
  color: var(--text-light);
}

.section-dark p {
  color: var(--text-muted);
}

.section-light {
  background: var(--white);
}

.section-off-white {
  background: var(--off-white);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 16px;
}

.section-dark .section-header .eyebrow {
  color: var(--green);
}

.lead {
  font-size: 1.2rem;
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 0;
  transition: var(--transition);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn-primary {
  background: var(--green);
  color: var(--black);
}

.btn-primary:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  padding: 16px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: var(--transition);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--black);
}

.btn-dark {
  background: var(--black);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--dark-alt);
  transform: translateY(-2px);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: var(--black);
  padding: 14px 0;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.nav-logo span {
  color: var(--green);
}

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
  transition: var(--transition);
  letter-spacing: 0.02em;
}

.nav-links a:hover {
  color: var(--green);
}

.nav-cta {
  background: var(--green);
  color: var(--black) !important;
  padding: 10px 24px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--green-dark);
  color: var(--black) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

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

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--black);
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-content {
  max-width: 700px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 24px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
}

.hero h1 .accent {
  color: var(--green);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.6;
  max-width: 580px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image-box {
  position: absolute;
  right: 0;
  top: 0;
  width: 45%;
  height: 100%;
  background: var(--dark-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.hero-image-box .placeholder-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
}

/* Problem Section */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.problem-card {
  text-align: left;
}

.problem-card .icon-box {
  width: 56px;
  height: 56px;
  background: var(--off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.problem-card h3 {
  margin-bottom: 12px;
  color: var(--text-dark);
}

/* Solution Section */
.solution-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.solution-image-box {
  aspect-ratio: 4 / 3;
  background: var(--dark-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.solution-image-box .placeholder-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.solution-text h2 {
  color: var(--white);
  margin-bottom: 24px;
}

.solution-features {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.solution-feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.solution-feature .check {
  color: var(--green);
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.solution-feature p {
  color: var(--text-muted);
  margin: 0;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--white);
  padding: 0;
  transition: var(--transition);
}

.service-card .service-image-box {
  aspect-ratio: 1 / 1;
  background: var(--off-white);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-card .service-image-box .placeholder-label {
  color: var(--text-muted-dark);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.service-card .service-content {
  padding: 24px;
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.95rem;
  margin: 0;
}

.service-card:hover {
  transform: translateY(-4px);
}

.service-card:hover .service-image-box {
  background: var(--dark-alt);
}

.service-card:hover .service-image-box .placeholder-label {
  color: var(--green);
}

/* Industries */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.industry-card {
  padding: 40px 32px;
  background: var(--dark-alt);
  transition: var(--transition);
}

.industry-card:hover {
  background: var(--green);
  color: var(--black);
}

.industry-card:hover h3,
.industry-card:hover p {
  color: var(--black);
}

.industry-card .industry-number {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--green);
  margin-bottom: 16px;
}

.industry-card:hover .industry-number {
  color: var(--black);
}

.industry-card h3 {
  color: var(--white);
  margin-bottom: 12px;
}

.industry-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* Why ARC */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.why-card {
  text-align: center;
}

.why-card .why-icon-box {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: var(--dark-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.why-card h3 {
  color: var(--white);
  margin-bottom: 12px;
}

.why-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* How It Works */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.step-card {
  text-align: center;
  position: relative;
}

.step-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--green);
  line-height: 1;
  margin-bottom: 20px;
}

.step-card h3 {
  margin-bottom: 12px;
}

.step-card p {
  font-size: 0.95rem;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  padding: 40px 28px;
  background: var(--white);
  text-align: center;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  background: var(--black);
  color: var(--white);
}

.pricing-card.featured h3,
.pricing-card.featured .price {
  color: var(--white);
}

.pricing-card.featured p {
  color: var(--text-muted);
}

.pricing-card .price-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 16px;
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.pricing-card .price-unit {
  font-size: 0.9rem;
  color: var(--text-muted-dark);
  margin-bottom: 24px;
}

.pricing-card.featured .price-unit {
  color: var(--text-muted);
}

.pricing-card p {
  font-size: 0.9rem;
}

/* Stats Bar */
.stats-bar {
  background: var(--green);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--black);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-item .stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black);
}

/* About */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-box {
  aspect-ratio: 4 / 5;
  background: var(--dark-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-image-box .placeholder-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.about-text h2 {
  color: var(--white);
  margin-bottom: 24px;
}

.about-text p {
  margin-bottom: 20px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  padding: 28px 0;
  cursor: pointer;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-dark);
}

.faq-question .faq-icon {
  font-size: 1.5rem;
  color: var(--green);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-top: 16px;
}

.faq-answer p {
  font-size: 1rem;
  line-height: 1.7;
}

/* Contact */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  color: var(--white);
  margin-bottom: 24px;
}

.contact-info p {
  margin-bottom: 32px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.contact-detail .contact-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  display: block;
  margin-bottom: 4px;
}

.contact-detail .contact-value {
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 500;
}

.contact-form {
  background: var(--dark-alt);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  background: var(--dark);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn {
  width: 100%;
}

/* Footer */
.footer {
  background: var(--black);
  padding: 60px 0 30px;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--green);
}

.footer-bottom {
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* GSAP Animation Initial States */
.reveal {
  opacity: 0;
  transform: translateY(40px);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
}

/* Responsive */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .hero-image-box {
    width: 40%;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 70px 0;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--black);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 1.2rem;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-image-box {
    display: none;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .solution-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .industries-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .section-header {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 20px;
  }

  .btn {
    padding: 14px 28px;
    font-size: 0.85rem;
  }

  .contact-form {
    padding: 28px 20px;
  }
}