/* ==============================================
   GreenBranch — Main Stylesheet
   Color Scheme: Deep Dark + Crimson + Sky Blue
   ============================================== */

:root {
  --color-bg: #FDFBF9;
  --color-dark: #1B1B24;
  --color-accent: #DC2626;
  --color-accent-dark: #B91C1C;
  --color-accent2: #0EA5E9;
  --color-accent2-dark: #0284C7;
  --color-surface: #F3EFEA;
  --color-text: #24222C;
  --color-muted: #6D6A76;
  --color-light: #F8F6F2;
  --color-border: #E5E0DA;
  --color-footer: #14131C;
  --color-footer-text: #C5C3CC;
  --transition: 0.3s ease;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 16px rgba(27, 27, 36, 0.06);
  --shadow-lg: 0 8px 40px rgba(27, 27, 36, 0.10);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==============================================
   NAVIGATION — MUST use .main-nav class selector
   ============================================== */

.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-dark);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.main-nav.scrolled {
  background: rgba(27, 27, 36, 0.97);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.18);
}

.nav-brand {
  font-size: 1.35rem;
  font-weight: 700;
  color: #FFFFFF;
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand .brand-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: #CECED0;
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: #FFFFFF;
}

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

.nav-cta {
  background: var(--color-accent) !important;
  color: #FFFFFF !important;
  padding: 10px 22px !important;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: background var(--transition) !important;
}

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

.nav-cta::after {
  display: none !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ==============================================
   HERO SECTION
   ============================================== */

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(160deg, var(--color-dark) 0%, #252337 50%, #1E1C2E 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 400px at 20% 80%, rgba(220, 38, 38, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 600px 500px at 80% 20%, rgba(14, 165, 233, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(220, 38, 38, 0.12);
  border: 1px solid rgba(220, 38, 38, 0.25);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-content h1 .highlight {
  color: var(--color-accent2);
}

.hero-content p {
  font-size: 1.15rem;
  color: #AFAFB2;
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(220, 38, 38, 0.35);
}

.btn-outline {
  background: transparent;
  color: #FFFFFF;
  border: 2px solid rgba(255, 255, 255, 0.28);
}

.btn-outline:hover {
  border-color: #FFFFFF;
  transform: translateY(-2px);
}

/* ==============================================
   SECTIONS — MUST use class selectors
   ============================================== */

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 50px;
  color: var(--color-accent2);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* About Section */
.about-section {
  padding: 100px 24px;
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: center;
}

.about-text h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--color-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-features {
  list-style: none;
  margin-top: 28px;
}

.about-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.975rem;
  color: var(--color-text);
}

.about-features li .check-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent2);
  font-weight: 700;
  font-size: 0.8rem;
}

.about-visual {
  position: relative;
}

.about-card {
  background: var(--color-dark);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: rgba(14, 165, 233, 0.12);
  border-radius: 50%;
}

.about-card .stat-row {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}

.about-card .stat-item h3 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.1;
}

.about-card .stat-item p {
  font-size: 0.85rem;
  color: #98989D;
  margin-top: 4px;
}

.about-card .card-desc {
  font-size: 1.05rem;
  color: #BFBFC2;
  line-height: 1.75;
}

/* Services Section */
.services-section {
  padding: 100px 24px;
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.service-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--color-border);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.service-icon.red {
  background: rgba(220, 38, 38, 0.08);
  color: var(--color-accent);
}

.service-icon.blue {
  background: rgba(14, 165, 233, 0.08);
  color: var(--color-accent2);
}

.service-icon.dark {
  background: rgba(27, 27, 36, 0.06);
  color: var(--color-dark);
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.925rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* Process Section */
.process-section {
  padding: 100px 24px;
  background: var(--color-bg);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

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

.process-step .step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--color-dark);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  position: relative;
  z-index: 2;
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* Contact Section */
.contact-section {
  padding: 100px 24px;
  background: linear-gradient(160deg, var(--color-dark) 0%, #252337 100%);
  color: #FFFFFF;
}

.contact-section .section-header h2 {
  color: #FFFFFF;
}

.contact-section .section-header p {
  color: #98989D;
}

.contact-section .section-label {
  background: rgba(14, 165, 233, 0.14);
  border: 1px solid rgba(14, 165, 233, 0.22);
  color: var(--color-accent2);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 1rem;
  color: #A4A4A7;
  line-height: 1.75;
  margin-bottom: 32px;
}

.contact-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-details li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.975rem;
  color: #D6D6D8;
}

.contact-details .contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: rgba(255, 255, 255, 0.07);
}

.contact-form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #BFBFC2;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  color: #FFFFFF;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent2);
}

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

.form-submit {
  width: 100%;
  padding: 14px;
  background: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.form-submit:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* ==============================================
   FOOTER
   ============================================== */

.site-footer {
  background: var(--color-footer);
  padding: 60px 24px 32px;
  color: var(--color-footer-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto 40px;
}

.footer-brand h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-footer-text);
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--color-footer-text);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-accent2);
}

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
}

/* ==============================================
   ANIMATIONS
   ============================================== */

.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ==============================================
   RESPONSIVE
   ============================================== */

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-dark);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 28px;
    transform: translateX(100%);
    transition: transform 0.4s ease;
    z-index: 999;
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 1.15rem;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

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

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

  .process-steps {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .section-header h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 560px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

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

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

  .about-card .stat-row {
    flex-direction: column;
    gap: 18px;
  }
}