/* Google Fonts — replace with self-hosted @font-face in production */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@700&display=swap');

/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --color-primary:        #2563EB;
  --color-primary-dark:   #1D4ED8;
  --color-primary-light:  #DBEAFE;
  --color-bg:             #FFFFFF;
  --color-bg-subtle:      #F8FAFC;
  --color-bg-muted:       #F1F5F9;
  --color-border:         #E2E8F0;
  --color-text-primary:   #0F1F3D;
  --color-text-secondary: #1E3A5F;
  --color-text-body:      #4A5568;
  --color-text-muted:     #64748B;
  --color-dark-bg:        #0F1F3D;
  --color-dark-text:      #F8FAFC;
  --color-podcast:        #2563EB;
  --color-erklaervideo:   #0891B2;
  --color-elearning:      #059669;
  --color-social-ad:      #7C3AED;
  --color-gold:           #F59E0B;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --font-light:    300;
  --font-regular:  400;
  --font-medium:   500;
  --font-semibold: 600;
  --font-bold:     700;

  --leading-tight:   1.25;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --container-max: 1200px;
  --container-pad: var(--space-6);
  --section-py:    var(--space-24);
  --nav-height:    72px;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  --transition-fast:   150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow:   600ms ease;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-body);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, canvas { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  font-weight: var(--font-bold);
}

h4, h5, h6 {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  font-weight: var(--font-semibold);
}

/* ============================================================
   Layout
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  width: 100%;
}

.section { padding: var(--section-py) 0; }
.section--subtle { background-color: var(--color-bg-subtle); }
.section--dark { background-color: var(--color-dark-bg); color: var(--color-dark-text); }
.text-center { text-align: center; }
.text-center .section__subline { margin-left: auto; margin-right: auto; }

.section__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-block;
  margin-bottom: var(--space-3);
}

.section__headline {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-6);
  line-height: var(--leading-tight);
}

.section__subline {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: var(--space-12);
  line-height: var(--leading-relaxed);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  transition: all var(--transition-normal);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn--outline:hover {
  background-color: var(--color-primary-light);
}

.btn--outline-white {
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

.btn--lg { padding: 1rem 2rem; font-size: var(--text-lg); }

/* ============================================================
   Badge
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* ============================================================
   Responsive base
   ============================================================ */
@media (max-width: 768px) {
  :root { --section-py: var(--space-16); }
  .section__headline { font-size: var(--text-3xl); }
}