/* ==========================================================================
   4INFINITY — one-page site styles
   ========================================================================== */

:root {
  --color-teal: #3d8d96;
  --color-teal-light: #5bb3ba;

  --color-bg: #0a121e;
  --color-bg-alt: #0e1a2a;
  --color-surface: #142338;
  --color-surface-border: rgba(255, 255, 255, 0.09);

  --color-text: #eef3f6;
  --color-text-muted: #a3b4c2;
  --color-text-faint: #76899a;

  --gradient-brand-soft: linear-gradient(135deg, rgba(61, 141, 150, 0.22) 0%, rgba(91, 179, 186, 0.12) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-teal) 0%, var(--color-teal-light) 100%);

  --font-heading: "Sora", system-ui, -apple-system, sans-serif;
  --font-body: "Sora", system-ui, -apple-system, sans-serif;

  --container-width: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;

  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-light);
  margin-bottom: 16px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

/* Background ambience */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 15% 10%, rgba(61, 141, 150, 0.14) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(61, 141, 150, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(61, 141, 150, 0.08) 0%, transparent 45%);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background var(--transition), padding var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(6, 13, 23, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 12px 0;
  border-bottom-color: var(--color-surface-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.brand img {
  height: 34px;
  width: auto;
}

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

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.main-nav a:hover {
  color: var(--color-text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: 999px;
  padding: 3px;
}

.lang-toggle button {
  border: none;
  background: transparent;
  color: var(--color-text-faint);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 6px 12px;
  border-radius: 999px;
  transition: all var(--transition);
}

.lang-toggle button.is-active {
  background: var(--gradient-accent);
  color: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(61, 141, 150, 0.5);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(61, 141, 150, 0.65);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-surface-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-teal);
  background: rgba(61, 141, 150, 0.08);
}

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

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

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

.hero {
  position: relative;
  padding: 200px 0 140px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.4rem, 4.6vw, 4rem);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero h1 .gradient-text {
  color: var(--color-teal-light);
}

.hero-lead {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: 40px;
}

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

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 4%;
  z-index: 0;
  background: var(--gradient-brand-soft);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.85;
}

.hero-photo {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 1px solid var(--color-surface-border);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
  border-radius: 42% 58% 65% 35% / 45% 40% 60% 55%;
  animation: blobmorph 14s ease-in-out infinite;
}

@keyframes blobmorph {
  0%, 100% { border-radius: 42% 58% 65% 35% / 45% 40% 60% 55%; }
  50% { border-radius: 58% 42% 38% 62% / 55% 60% 40% 45%; }
}

/* ==========================================================================
   Section shared
   ========================================================================== */

section {
  padding: 120px 0;
  position: relative;
}

.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-head.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 17px;
}

/* ==========================================================================
   About / Services
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 72px;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  font-size: 16.5px;
  margin-bottom: 20px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 141, 150, 0.4);
  background: linear-gradient(160deg, rgba(61, 141, 150, 0.08), var(--color-surface));
}

.service-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand-soft);
  border: 1px solid var(--color-surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-teal-light);
}

.service-icon svg {
  width: 22px;
  height: 22px;
}

.service-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 14.5px;
}

/* ==========================================================================
   Stats
   ========================================================================== */

.stats-section {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-surface-border);
  border-bottom: 1px solid var(--color-surface-border);
}

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

.stat-block .stat-num {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--color-teal-light);
}

.stat-block .stat-label {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--color-text-muted);
}

/* ==========================================================================
   References
   ========================================================================== */

.references-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.reference-card {
  aspect-ratio: 3 / 2;
  background: var(--color-surface);
  border: 1px dashed var(--color-surface-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-faint);
  font-size: 13px;
  text-align: center;
  padding: 12px;
  transition: border-color var(--transition), color var(--transition);
}

.reference-card:hover {
  border-color: var(--color-teal);
  color: var(--color-text-muted);
}

.references-note {
  margin-top: 24px;
  font-size: 13.5px;
  color: var(--color-text-faint);
  text-align: center;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}

.contact-info-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  color: var(--color-text-muted);
}

.contact-info-list .icon-badge {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-teal-light);
}

.contact-info-list .icon-badge svg {
  width: 18px;
  height: 18px;
}

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

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

.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-surface-border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 14.5px;
  transition: border-color var(--transition), background var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  background: rgba(61, 141, 150, 0.06);
}

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

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-submit {
  display: flex;
  align-items: center;
  gap: 16px;
}

.form-status {
  font-size: 14px;
}

.form-status.is-success {
  color: var(--color-teal-light);
}

.form-status.is-error {
  color: #e08585;
}

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

.site-footer {
  border-top: 1px solid var(--color-surface-border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
}

.footer-brand img {
  height: 26px;
}

.footer-meta {
  font-size: 13.5px;
  color: var(--color-text-faint);
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: color var(--transition), border-color var(--transition);
}

.footer-socials a:hover {
  color: var(--color-teal-light);
  border-color: var(--color-teal);
}

.footer-socials svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Reveal animation
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 340px;
    margin: 0 auto;
  }

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

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

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

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

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    top: 68px;
    left: 16px;
    right: 16px;
    background: rgba(9, 18, 31, 0.97);
    border: 1px solid var(--color-surface-border);
    border-radius: var(--radius-md);
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }

  .main-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 16px;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .header-actions .btn-primary {
    display: none;
  }

  .hero {
    padding: 150px 0 90px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 28px;
  }

  section {
    padding: 80px 0;
  }
}

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

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

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