:root {
  --color-bg: #0D1F35;
  --color-bg-light: #112743;
  --color-bg-lighter: #f4f7fb;
  --color-text: #f5f7fb;
  --color-text-dark: #0D1F35;
  --color-accent: #39b5ff;
  --color-accent-soft: #5ad1ff;
  --radius: 6px;
  --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.35);
  --max-width: 1120px;
}

/* Global */

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

html, body {
  margin: 0;
  padding: 0;
}

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

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

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

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h2 {
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h3 {
  font-size: 1.1rem;
  text-transform: none;
}

/* Layout helpers */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  min-height: 100vh;
  padding: 6rem 0 4rem;
  display: flex;
  align-items: center;
}

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

.section-dark {
  background-color: #0B1827;
  color: var(--color-text);
}

.section-contact {
  background-color: #050c16;
  color: var(--color-text);
}

.section-cta {
  margin-top: 1.75rem;
}

.section-cta.align-end {
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
}

/* Header */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: #0B2035; /* matches logo bg */
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.25rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand-logo {
  height: 36px;
}

/* Desktop nav */

.main-nav {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.main-nav a {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
  padding: 0.35rem 0.5rem;
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 30px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background-color: #ffffff;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

/* X state when menu is open */
body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav a {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
  padding: 0.35rem 0.5rem;
}

.main-nav a.btn {
  text-transform: none;
}

/* Hero */

.hero-section {
  background-color: var(--color-bg);
  padding-top: 6.5rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.hero-text {
  max-width: 580px;
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  opacity: 0.8;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  margin-top: 1rem;
  font-size: 0.98rem;
  max-width: 520px;
}

.hero-cta {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-image-wrap {
  max-width: 360px;
  margin: 0 auto;
}

.hero-image {
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.7rem 1.3rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #02101f;
  box-shadow: 0 10px 22px rgba(13, 137, 214, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(13, 137, 214, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* Lists */

.bullet-list {
  padding-left: 1.25rem;
  margin: 1rem 0 0;
}

.bullet-list li {
  margin-bottom: 0.4rem;
}

/* Grids */

.grid-2,
.grid-3 {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.75rem;
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-2.stack-top {
  align-items: flex-start;
}

/* Contact */

.section-contact .contact-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.contact-list {
  list-style: none;
  padding-left: 0;
  margin: 1.25rem 0 0;
}

.contact-list li {
  margin-bottom: 0.5rem;
}

.contact-panel {
  background-color: rgba(9, 20, 36, 0.95);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.contact-form {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.contact-form label {
  font-size: 0.9rem;
  display: grid;
  gap: 0.25rem;
}

.contact-form input,
.contact-form textarea {
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(1, 5, 12, 0.9);
  color: var(--color-text);
  padding: 0.6rem 0.7rem;
  font: inherit;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.contact-form button[disabled] {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Footer */

.site-footer {
  background-color: #020711;
  color: rgba(255, 255, 255, 0.75);
  padding: 1rem 0;
}

.footer-inner {
  text-align: center;
  font-size: 0.82rem;
}

/* --------- Media Queries --------- */

@media (min-width: 768px) {
  h1 {
    font-size: 2.4rem;
  }

  h2 {
    font-size: 1.8rem;
  }

  .hero-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .hero-image-wrap {
    max-width: 320px;
  }

  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .section-contact .contact-inner {
    grid-template-columns: 1.1fr 1fr;
  }
}

@media (max-width: 640px) {
 /* Toggle button base (hidden on desktop) */
.nav-toggle {
  display: none;
  width: 36px;
  height: 30px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background-color: #ffffff;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

/* X state when menu is open */
body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------- Mobile (<= 640px) -------- */
@media (max-width: 640px) {
  .nav-toggle {
    display: flex; /* show hamburger on mobile */
  }

  .main-nav {
    display: none; /* hidden by default on mobile */
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background-color: #0B2035;
    padding: 0.75rem 1.25rem 1rem;
    flex-direction: column;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .main-nav a {
    padding: 0.4rem 0;
    font-size: 0.85rem;
  }

  /* Show menu when toggled */
  body.nav-open .main-nav {
    display: flex;
  }

  .hero-section {
    padding-top: 5.5rem;
  }

  .section {
    padding-top: 5rem;
  }
}