:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-text: #1e293b;
  --color-text-light: #475569;
  --color-text-inverse: #f1f5f9;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-secondary: #0f172a;
  --color-accent: #38bdf8;
  --color-border: #e2e8f0;
  --radius: 0.75rem;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --max-width: 1200px;
  --header-height: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.section {
  padding-block: 5rem;
}

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

.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section-header {
  max-width: 640px;
  margin-bottom: 3rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 800;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.25rem;
}

p {
  color: var(--color-text-light);
}

.section-dark p,
.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: var(--color-text-inverse);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  color: white;
  border-radius: 0.4rem;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.primary-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
}

.nav-cta {
  background: var(--color-primary);
  color: white !important;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s ease;
}

/* Hero */
.hero {
  position: relative;
  padding-block: 7rem 6rem;
  overflow: hidden;
  background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero-lead {
  font-size: 1.25rem;
  margin-block: 1.5rem 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.hero-cta {
  margin-top: 0.5rem;
}

.hero-accent {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

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

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

.btn-secondary {
  background: white;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
}

/* Services */
.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.service-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.service-card h3 {
  margin-bottom: 0.75rem;
}

/* Portfolio */
.portfolio-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.portfolio-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease;
}

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

.portfolio-thumb {
  height: 180px;
  background: var(--bg, var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-logo {
  color: white;
  font-weight: 800;
  font-size: 1.5rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.portfolio-body {
  padding: 1.5rem;
}

.portfolio-body h3 {
  margin-bottom: 0.25rem;
}

.portfolio-tag {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.portfolio-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: white !important;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--radius);
  transition: background 0.15s ease, transform 0.15s ease;
  text-decoration: none;
}

.portfolio-link:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

.portfolio-link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.portfolio-link:hover::after {
  transform: translateX(3px);
}

/* How It Works */
.steps {
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 1.5rem;
}

.step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.step-number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 0.5rem;
}

/* Testimonials */
.testimonials-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.testimonial {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--color-primary);
}

.testimonial p {
  font-size: 1.05rem;
  font-style: italic;
  margin-bottom: 1.25rem;
}

.testimonial footer {
  color: var(--color-text-light);
}

.testimonial cite strong {
  color: var(--color-text);
  font-style: normal;
}

/* FAQ */
.faq-container {
  max-width: 800px;
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-item {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--color-primary);
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding: 0 1.5rem 1.25rem;
}

/* Contact */
.contact {
  text-align: center;
}

.contact-content {
  max-width: 720px;
  margin-inline: auto;
}

.contact-lead {
  font-size: 1.125rem;
  margin-block: 1rem 2rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-dark .btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.3);
}

.section-dark .btn-secondary:hover {
  background: rgba(255,255,255,0.1);
}

.contact-address {
  font-style: normal;
  color: rgba(255,255,255,0.7);
}

/* Footer */
.site-footer {
  background: #020617;
  color: rgba(255,255,255,0.7);
  padding-block: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.footer-email a {
  color: white;
  font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    transform: translateY(-150%);
    transition: transform 0.25s ease;
    visibility: hidden;
  }

  .primary-nav.is-open {
    transform: translateY(0);
    visibility: visible;
  }

  .primary-nav ul {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }

  .primary-nav a {
    display: block;
    padding: 0.5rem 0;
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    padding-block: 4rem 3rem;
  }

  .section {
    padding-block: 3rem;
  }

  .step {
    flex-direction: column;
    gap: 0.75rem;
  }
}