/* Seritus one-page website */

:root {
  --dark: #001f1f;
  --dark-2: #052a28;
  --green: #00d873;
  --green-2: #0a9f58;
  --green-3: #063f31;
  --white: #ffffff;
  --off-white: #f4fbf7;
  --text: #d7e7e1;
  --muted: #8ca8a0;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--dark);
}

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(0, 31, 31, 0.9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 118px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.95rem;
  color: var(--text);
}

.site-nav a {
  opacity: 0.82;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.site-nav a:hover {
  opacity: 1;
  color: var(--green);
}

.section {
  padding: 96px 0;
}

.hero {
  min-height: calc(100vh - 84px);
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at 78% 24%, rgba(0, 216, 115, 0.18), transparent 32%),
    radial-gradient(circle at 15% 75%, rgba(10, 159, 88, 0.2), transparent 35%),
    linear-gradient(135deg, var(--dark), var(--dark-2));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 7vw, 6.3rem);
  line-height: 0.95;
  letter-spacing: -0.065em;
  color: var(--white);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--white);
}

h3 {
  margin-bottom: 12px;
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--white);
}

.hero-text {
  max-width: 630px;
  margin-bottom: 34px;
  font-size: 1.25rem;
  color: var(--text);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--dark);
  background: var(--green);
}

.button.secondary {
  color: var(--white);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
}

.hero-card {
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow);
}

.hero-card h2 {
  font-size: 2rem;
}

.hero-card ul {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-card li {
  padding: 13px 0 13px 30px;
  border-top: 1px solid var(--border);
  position: relative;
}

.hero-card li::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--green);
  position: absolute;
  left: 0;
  top: 22px;
  transform: rotate(45deg);
}

.light-section {
  color: #17332b;
  background: var(--off-white);
}

.light-section h2,
.light-section h3 {
  color: var(--dark);
}

.light-section .eyebrow {
  color: var(--green-2);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 42px;
}

.section-heading p:not(.eyebrow) {
  font-size: 1.1rem;
  color: #45645a;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  min-height: 280px;
  padding: 30px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 14px 35px rgba(0, 31, 31, 0.08);
}

.card-number {
  display: inline-flex;
  margin-bottom: 40px;
  color: var(--green-2);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.card p {
  color: #45645a;
}

.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.split-grid > div > p {
  color: var(--text);
}

.process-list {
  display: grid;
  gap: 16px;
}

.process-item {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.process-item strong {
  color: var(--white);
}

.process-item p {
  margin: 8px 0 0;
  color: var(--muted);
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.item-grid span {
  display: flex;
  align-items: center;
  min-height: 84px;
  padding: 20px;
  border-radius: 18px;
  color: var(--dark);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(0, 31, 31, 0.07);
  font-weight: 700;
}

.about-section {
  background:
    linear-gradient(135deg, rgba(0, 216, 115, 0.1), transparent 45%),
    var(--green-3);
}

.contact-section {
  padding-top: 0;
}

.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  padding: 52px;
  border-radius: var(--radius);
  background: var(--green);
  color: var(--dark);
}

.contact-card h2,
.contact-card .eyebrow {
  color: var(--dark);
}

.contact-card p {
  color: rgba(0, 31, 31, 0.78);
}

.contact-details {
  padding: 28px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.45);
}

.contact-details p {
  margin-bottom: 10px;
}

.contact-details a {
  font-weight: 700;
  border-bottom: 1px solid rgba(0, 31, 31, 0.35);
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  color: var(--green);
}

@media (max-width: 860px) {
  .site-nav {
    display: none;
  }

  .section {
    padding: 72px 0;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .split-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .cards,
  .item-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-card {
    padding: 28px;
  }

  .contact-card {
    padding: 34px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    min-height: 74px;
  }

  .brand img {
    width: 104px;
  }

  .section {
    padding: 58px 0;
  }

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

  .button {
    width: 100%;
  }

  .cards,
  .item-grid {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
  }

  .item-grid span {
    min-height: 68px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}