:root {
  --bg: #f8fafc;
  --text: #0f172a;
  --card: #ffffff;
  --muted: #475569;
  --accent-1: #6366f1;
  --accent-2: #0ea5e9;
  --radius: 14px;
  --max-width: 1100px;
  font-family: 'Inter', system-ui, sans-serif;
  color-scheme: light;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
  color: var(--text);
  line-height: 1.45;
  padding: 32px 20px;
  display: flex;
  justify-content: center;
}

.wrap {
  width: 100%;
  max-width: var(--max-width);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  display: grid;
  place-items: center;
  font-weight: 800;
  color: white;
}

.site-title {
  font-weight: 700;
  font-size: 1.05rem;
}

nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 600;
  transition: 0.2s ease;
}

nav a:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text);
}

.cta {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  padding: 8px 14px;
  border-radius: 12px;
  color: white;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.theme-btn {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: var(--card);
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 28px;
  align-items: center;
  margin-top: 18px;
}

.eyebrow {
  display: inline-block;
  background: rgba(0, 0, 0, 0.05);
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 700;
  color: var(--muted);
  font-size: 0.82rem;
}

h1 {
  margin: 14px 0 10px;
  font-size: 2.1rem;
  line-height: 1.05;
}

p.lead {
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 18px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.card {
  background: var(--card);
  padding: 18px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

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

/* 💬 Kontakt */
.contact {
  margin-top: 60px;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 16px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  font-weight: 600;
  color: var(--muted);
}

.contact-form input,
.contact-form textarea {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: var(--card);
  color: var(--text);
  font-family: inherit;
}

.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-form .full {
  grid-column: 1 / -1;
}

/* 🔆 Tmavý režim */
:root.dark {
  --bg: #0f1724;
  --text: #e6eef8;
  --card: rgba(255, 255, 255, 0.05);
  --muted: rgba(255, 255, 255, 0.7);
  color-scheme: dark;
}

:root.dark body {
  background: linear-gradient(180deg, #071025 0%, #081426 100%);
}

:root.dark input,
:root.dark textarea {
  border-color: rgba(255, 255, 255, 0.15);
}