/* Klepeťák – Modern AI-forward design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #f1f5f9;
  --color-border: #e2e8f0;
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-accent: #8b5cf6;
  --color-accent-warm: #f59e0b;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-dark: #0f172a;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --radius-sm: 0.5rem;
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
  --max-width: 1120px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Header ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 2rem;
}

.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo img {
  display: block;
  height: 2rem;
  width: auto;
}

.logo-text {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.nav a:hover {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.06);
}

/* ─── Dropdown Nav ─── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  border: none;
  background: none;
  cursor: pointer;
  transition: all var(--transition);
}

.nav-dropdown-trigger svg {
  transition: transform var(--transition);
}

.nav-dropdown-trigger:hover {
  color: var(--color-primary);
  background: rgba(99, 102, 241, 0.06);
}

.nav-dropdown:hover .nav-dropdown-trigger svg {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.25rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(4px);
  transition: all 0.15s ease;
  z-index: 200;
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: flex;
  flex-direction: column;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition);
}

.nav-dropdown-item:hover {
  background: var(--color-surface-alt);
}

.nav-dropdown-label {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.9rem;
}

.nav-dropdown-desc {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: 0.125rem;
}

/* ─── Main ─── */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 4rem;
  min-height: 60vh;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  color: #fff;
  padding: 5rem 3rem;
  border-radius: var(--radius-xl);
  margin: 2rem 0 3rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 50%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.hero-portrait {
  width: 100px;
  height: 100px;
  object-fit: contain;
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  padding: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.hero-mascot {
  width: 220px;
  height: auto;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.3));
}

.hero-text {
  flex: 1;
  min-width: 280px;
}

.hero-text h1 {
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.tagline {
  margin: 0;
  font-size: 1.15rem;
  opacity: 0.75;
  font-weight: 400;
  line-height: 1.6;
}

/* ─── Content ─── */
.content-wrap {
  margin-top: 0;
}

.markdown-body {
  margin-bottom: 3rem;
  max-width: 720px;
}

.markdown-body h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 2.5rem 0 0.75rem;
  line-height: 1.2;
  color: var(--color-text);
}

.markdown-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.5rem;
  color: var(--color-text);
  position: relative;
  padding-left: 1rem;
}

.markdown-body h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 3px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.markdown-body p {
  margin: 0.75rem 0;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.markdown-body ul {
  margin: 1rem 0;
  padding-left: 0;
  list-style: none;
}

.markdown-body ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

.markdown-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* ─── Klepítka Grid ─── */
.klepitka-grid {
  margin: 3rem 0;
}

.klepitka-grid h2 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.klepitka-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.klepitko-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--color-surface);
  padding: 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.klepitko-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.klepitko-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.klepitko-card:hover::before {
  opacity: 1;
}

.klepitko-portrait {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  background: var(--color-surface-alt);
}

.klepitko-card h3 {
  margin: 0 0 0.375rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.klepitko-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ─── CTA / Subscribe ─── */
.cta-section {
  background: linear-gradient(135deg, #0f172a, #1e1b4b);
  padding: 3rem;
  border-radius: var(--radius-xl);
  margin-top: 3rem;
  position: relative;
  overflow: hidden;
  color: #fff;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 50%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  margin-top: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  z-index: 1;
  margin-bottom: 1.5rem;
}

.subscribe-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.input-email {
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  min-width: 260px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  backdrop-filter: blur(4px);
  transition: all var(--transition);
}

.input-email::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.input-email:focus {
  outline: none;
  border-color: var(--color-primary-light);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.btn-submit {
  padding: 0.75rem 1.75rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 1px 2px rgba(99, 102, 241, 0.3);
}

.btn-submit:hover {
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.success {
  color: #34d399;
  font-weight: 600;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

/* ─── Sub-page ─── */
.page-content {
  margin-top: 2rem;
}

.page-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  padding: 2.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.page-portrait {
  width: 100px;
  height: 100px;
  object-fit: contain;
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  flex-shrink: 0;
}

.page-title-wrap {
  flex: 1;
  min-width: 200px;
}

.page-title-wrap h1 {
  margin: 0 0 0.375rem;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.page-title-wrap .lead {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

/* ─── Footer ─── */
.site-footer {
  background: var(--color-dark);
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-inner p {
  margin: 0;
  letter-spacing: 0.01em;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .header-inner {
    padding: 0.75rem 1.25rem;
  }

  .nav {
    gap: 0;
  }

  .nav a,
  .nav-dropdown-trigger {
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
  }

  .nav-dropdown-menu {
    min-width: 220px;
    left: auto;
    right: 0;
    transform: translateY(4px);
  }

  .nav-dropdown:hover .nav-dropdown-menu {
    transform: translateY(0);
  }

  .site-main {
    padding: 0 1.25rem 3rem;
  }

  .hero {
    padding: 3rem 1.75rem;
    margin: 1.5rem 0 2rem;
  }

  .hero-text h1 {
    font-size: 1.75rem;
  }

  .hero-inner {
    gap: 1.5rem;
  }

  .hero-portrait {
    width: 72px;
    height: 72px;
  }

  .hero-mascot {
    width: 150px;
  }

  .cta-section {
    padding: 2rem 1.5rem;
  }

  .page-header {
    padding: 1.75rem;
  }

  .klepitka-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.5rem;
  }

  .hero-mascot {
    width: 120px;
  }

  .nav a,
  .nav-dropdown-trigger {
    padding: 0.35rem 0.5rem;
    font-size: 0.8rem;
  }

  .input-email {
    min-width: 100%;
  }
}