:root {
  --color-navy: #0B1E3D;
  --color-navy-dark: #060F20;
  --color-yellow: #F5E642;
  --color-black: #111111;
  --color-white: #FFFFFF;
  --color-muted: #5B6472;
  --color-muted-light: #C9CEDA;

  --font-base: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 8px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-black);
  background: var(--color-white);
  line-height: 1.55;
}

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

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

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--color-navy);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-yellow);
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.brand__mark {
  width: 30px;
  height: auto;
  display: block;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
}

.nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}

.nav.nav--open {
  display: flex;
}

.nav a {
  color: var(--color-white);
  text-decoration: none;
  padding: 12px 0;
  font-weight: 500;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.nav__cta {
  color: var(--color-navy-dark) !important;
  background: var(--color-yellow);
  border-radius: var(--radius);
  padding: 10px 16px !important;
  text-align: center;
  margin-top: 8px;
  border-top: none !important;
}

@media (min-width: 768px) {
  .site-header__inner {
    padding: 18px 24px;
  }
  .nav-toggle {
    display: none;
  }
  .nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 28px;
    width: auto;
  }
  .nav a {
    padding: 0;
    border-top: none;
  }
  .nav__cta {
    margin-top: 0;
  }
}

/* ---------- Hero ---------- */

.hero {
  background:
    linear-gradient(160deg, rgba(11, 30, 61, 0.90) 0%, rgba(6, 15, 32, 0.94) 100%),
    url("../img/hero-construction.jpg") center/cover no-repeat;
  color: var(--color-white);
  padding: 72px 0 88px;
}

.hero__inner {
  max-width: 760px;
}

.eyebrow {
  color: var(--color-yellow);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 700;
  margin: 0 0 16px;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.15;
  margin: 0 0 20px;
}

.hero__lead {
  font-size: 1.1rem;
  color: var(--color-muted-light);
  margin: 0 0 32px;
}

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

@media (min-width: 768px) {
  .hero {
    padding: 108px 0 128px;
  }
  .hero h1 {
    font-size: 3.2rem;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
}

.btn--primary {
  background: var(--color-yellow);
  color: var(--color-navy-dark);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

/* ---------- Sections ---------- */

.section {
  padding: 64px 0;
}

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

.section--dark {
  background: var(--color-navy);
  color: var(--color-white);
}

.section--dark .card {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
}

.section--dark .stat__label {
  color: var(--color-muted-light);
}

.section__title {
  font-size: 1.9rem;
  margin: 0 0 12px;
}

.section__lead {
  max-width: 680px;
  font-size: 1.05rem;
  opacity: 0.9;
  margin: 0 0 40px;
}

.section__note {
  max-width: 760px;
  margin-top: 32px;
  opacity: 0.85;
}

@media (min-width: 768px) {
  .section {
    padding: 96px 0;
  }
}

/* ---------- Grids / Cards ---------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid--4col,
.grid--2col,
.grid--stats {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--2col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .grid--4col {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: #F7F8FA;
  border: 1px solid #E7E9EE;
  border-radius: var(--radius);
  padding: 24px;
}

.card__title {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.card__body {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.section--dark .card__body {
  color: var(--color-muted-light);
}

.card--scenario .card__title {
  font-size: 1.2rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-yellow);
}

.stat__label {
  font-weight: 500;
}

.stat__source {
  font-size: 0.8rem;
  color: var(--color-muted);
  opacity: 0.8;
}

/* ---------- Split (image + text) ---------- */

.split {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  margin-top: 40px;
}

.split--top {
  margin-top: 0;
  margin-bottom: 40px;
}

.split > * {
  flex: 1;
  width: 100%;
  margin: 0;
}

.split__img {
  border-radius: var(--radius);
  width: 100%;
  height: 240px;
  object-fit: cover;
}

@media (min-width: 768px) {
  .split {
    flex-direction: row;
    gap: 48px;
    align-items: center;
  }
  .split--reverse {
    flex-direction: row-reverse;
  }
  .split__img {
    height: 300px;
  }
}

/* ---------- About ---------- */

.about {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}

.about__avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
}

@media (min-width: 768px) {
  .about {
    flex-direction: row;
    align-items: center;
  }
}

/* ---------- Contact ---------- */

.contact {
  max-width: 640px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 24px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-weight: 600;
  font-size: 0.9rem;
}

.form-field input,
.form-field textarea {
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-white);
  font-family: inherit;
  font-size: 1rem;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-muted-light);
}

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

.banner {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-weight: 600;
  margin: 0 0 8px;
}

.banner--success {
  background: rgba(76, 175, 80, 0.15);
  color: #9BE3A0;
  border: 1px solid rgba(76, 175, 80, 0.4);
}

.banner--error {
  background: rgba(244, 67, 54, 0.15);
  color: #F3A6A0;
  border: 1px solid rgba(244, 67, 54, 0.4);
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-black);
  color: var(--color-muted-light);
  padding: 24px 0;
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer a {
  color: var(--color-yellow);
  text-decoration: none;
}

@media (min-width: 640px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
  }
}