:root {
  --bg: #0f1115;
  --bg-soft: #151922;
  --text: #ecf1ff;
  --muted: #b2bed8;
  --line: #2a3346;
  --card: #121722;
  --accent: #7aa2ff;
  --accent-2: #96ffd3;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

html[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-soft: #ffffff;
  --text: #141826;
  --muted: #5d667a;
  --line: #d8dfec;
  --card: #ffffff;
  --accent: #305fdd;
  --accent-2: #0b8f68;
  --shadow: 0 12px 26px rgba(25, 35, 55, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 20% -20%, rgba(122,162,255,0.18), transparent 35%), var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3 {
  font-family: "Merriweather", Georgia, Cambria, "Times New Roman", serif;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

p { margin: 0 0 1rem; color: var(--muted); }

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

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.section { padding: 5.5rem 0; }
.section-head { margin-bottom: 1.75rem; }
.section-head p { max-width: 65ch; }

.skip-link {
  position: absolute;
  left: -999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 9999;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 14%, transparent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  padding: 0.45rem 0.65rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
}

.site-nav a:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.nav-cta {
  border: 1px solid var(--line);
}

.theme-toggle, .menu-btn {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 0.55rem;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
}

.menu-btn {
  display: none;
}

/* Hero */
.hero {
  padding-top: 7rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.7rem);
  max-width: 16ch;
  margin-bottom: 1rem;
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 1.07rem;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.68rem 1rem;
  border-radius: 0.62rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, background-color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(130deg, var(--accent), color-mix(in srgb, var(--accent) 65%, #ffffff 35%));
  color: white;
}
.btn-ghost {
  border-color: var(--line);
  background: var(--bg-soft);
}

/* Cards */
.grid {
  display: grid;
  gap: 1rem;
}
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 92%, #ffffff 8%), var(--card));
  border: 1px solid var(--line);
  border-radius: 0.95rem;
  padding: 1.1rem;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
}

.card-kicker {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  margin-bottom: 0.5rem;
}
.card-link {
  display: inline-block;
  margin-top: 0.55rem;
  color: var(--accent);
}

/* About */
.about-wrap {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 1.2rem;
  align-items: start;
}

.social-list {
  margin: 0;
  padding-left: 1rem;
}
.social-list li {
  margin: 0.4rem 0;
}

/* Form */
.contact-form {
  max-width: 720px;
  display: grid;
  gap: 0.9rem;
}
.contact-form label {
  display: grid;
  gap: 0.4rem;
  font-weight: 500;
}
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 0.62rem;
  padding: 0.75rem 0.85rem;
  font: inherit;
}
input:focus, textarea:focus, button:focus, a:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 65%, #fff 35%);
  outline-offset: 2px;
}
.form-note {
  font-size: 0.92rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.1rem 0 2.4rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

/* Responsive */
@media (max-width: 900px) {
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .about-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .menu-btn { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 70px;
    right: 4vw;
    flex-direction: column;
    align-items: flex-start;
    width: min(270px, 88vw);
    padding: 0.85rem;
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    background: var(--bg-soft);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: 0.2s ease;
  }
  .site-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .cards-3, .cards-2 { grid-template-columns: 1fr; }
  .hero-actions { flex-wrap: wrap; }
}