:root {
  --color-bg: #0f151f;
  --color-bg-muted: #141c28;
  --color-bg-elevated: #1a2331;
  --color-text: #edf1f7;
  --color-text-muted: #97a2b3;
  --color-border: #263041;
  --color-navy: #ffffff;
  --color-accent: #4d84ff;
  --color-accent-dark: #2f6fed;
  --color-accent-2: #f0a940;
  --color-accent-2-dark: #d9861f;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --max-width: 1100px;
  --radius: 10px;
  --transition: 180ms ease;
  --reveal-distance: 24px;
  --reveal-duration: 600ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: var(--color-navy);
}

p {
  margin: 0 0 1em;
}

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

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

.accent {
  color: var(--color-accent);
}

/* Underline hover animation for text links */

.nav__menu a:not(.nav__cta),
.card__link,
.contact-fallback a {
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 2px;
  transition: background-size 220ms ease, color var(--transition);
}

.nav__menu a:not(.nav__cta):hover,
.card__link:hover,
.contact-fallback a:hover {
  background-size: 100% 2px;
}

/* Header / Nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 21, 31, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav__brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-navy);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__menu a {
  color: var(--color-text);
  font-weight: 500;
  transition: color var(--transition);
}

.nav__menu a:hover {
  color: var(--color-accent);
}

.nav__cta {
  background: var(--color-accent);
  color: #fff !important;
  padding: 9px 18px;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background: var(--color-accent-2);
  transform: translateY(-1px);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Hero */

.hero {
  padding: 120px 0 90px;
  background:
    radial-gradient(1100px circle at 18% -10%, rgba(77, 132, 255, 0.16), transparent 55%),
    radial-gradient(800px circle at 100% 0%, rgba(240, 169, 64, 0.08), transparent 50%),
    var(--color-bg);
}

.hero__content {
  max-width: 720px;
  animation: heroIn 700ms ease-out both;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.eyebrow--alt {
  color: var(--color-accent-2);
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero__subtext {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 560px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-2);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 24px rgba(240, 169, 64, 0.25);
}

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

.btn--ghost:hover {
  border-color: var(--color-navy);
  transform: translateY(-2px) scale(1.02);
}

/* Sections */

.section {
  padding: 90px 0;
}

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

.section__header {
  max-width: 640px;
}

.section__title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.section__subtitle {
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 560px;
}

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
  border-color: var(--color-accent);
}

.card h3 {
  font-size: 1.15rem;
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.card--placeholder {
  opacity: 0.85;
}

.card__badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.card__badge--concept {
  background: rgba(77, 132, 255, 0.14);
  border-color: rgba(77, 132, 255, 0.3);
  color: var(--color-accent);
}

.card__price {
  font-weight: 700;
  color: var(--color-accent-2);
  margin-bottom: 0;
  margin-top: 12px;
  font-size: 0.9rem;
}

.card__link-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.card__link {
  display: inline-block;
  font-weight: 600;
  font-size: 0.9rem;
}

.card__link--muted {
  color: var(--color-text-muted);
  font-weight: 500;
}

/* About */

.about {
  max-width: 720px;
}

/* Contact form */

.contact-form {
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.form-row label {
  font-weight: 500;
  font-size: 0.9rem;
}

.form-row input,
.form-row textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  resize: vertical;
  transition: border-color var(--transition);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.hidden-field {
  position: absolute;
  left: -9999px;
}

.form-note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  min-height: 1.2em;
}

.form-note--success {
  color: #3ddc84;
}

.form-note--error {
  color: #ff6b6b;
}

.contact-fallback {
  margin-top: 28px;
  color: var(--color-text-muted);
}

/* Footer */

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

.footer__content {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
}

/* Scroll-reveal animations */

.reveal {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition: opacity var(--reveal-duration) ease, transform var(--reveal-duration) ease;
}

.reveal-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .hero__content {
    transition: none !important;
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Mobile nav */

@media (max-width: 720px) {
  .nav__brand {
    font-size: 1.05rem;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

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

  .nav__menu li {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav__menu li:last-child {
    border-bottom: none;
    padding-top: 16px;
  }

  .nav__cta {
    display: inline-block;
  }

  .nav__toggle.is-open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav__toggle.is-open span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.is-open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero {
    padding: 90px 0 60px;
  }

  .section {
    padding: 60px 0;
  }
}