/* ============================================
   WUMPLE - Makronährstoffe Verstehen
   Modular Institutional Design System
   ============================================ */

/* ============================================
   ROOT VARIABLES & COLOR SYSTEM
   ============================================ */

:root {
  /* Primary & Neutral Colors */
  --color-forest-green: #2d5a3d;
  --color-dark-gray: #3a3a3a;
  --color-off-white: #f8f7f4;
  --color-white: #ffffff;
  
  /* Accent Colors */
  --color-warm-ivory: #e8dcc8;
  --color-ochre: #b8956a;
  --color-terracotta: #9d6b5c;
  
  /* Functional Colors */
  --color-text: #3a3a3a;
  --color-text-light: #666666;
  --color-border: #d4cfc8;
  --color-shadow: rgba(45, 90, 61, 0.1);
  
  /* Spacing System (8px base) */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 64px;
  
  /* Typography */
  --font-serif: 'Crimson Text', 'Playfair Display', serif;
  --font-sans: 'Source Sans Pro', 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Courier New', monospace;
  
  /* Line heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.4;
  --line-height-relaxed: 1.6;
  --line-height-loose: 1.8;
  
  /* Border radius */
  --radius: 4px;
  
  /* Max width */
  --max-width: 1280px;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-off-white);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1 {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-forest-green);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-dark-gray);
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

h3 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: var(--line-height-normal);
  color: var(--color-dark-gray);
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

h4 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark-gray);
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

p {
  font-size: 1.125rem;
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-forest-green);
  text-decoration: none;
  transition: color 0.3s ease, border-bottom 0.3s ease;
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-ochre);
  border-bottom: 1px solid var(--color-ochre);
}

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
}

strong {
  font-weight: 600;
  color: var(--color-forest-green);
}

em {
  font-style: italic;
  color: var(--color-text-light);
}

blockquote {
  border-left: 4px solid var(--color-ochre);
  padding: var(--spacing-md);
  padding-left: var(--spacing-lg);
  background-color: var(--color-warm-ivory);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-dark-gray);
}

/* ============================================
   LAYOUT STRUCTURE
   ============================================ */

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

.container-full {
  width: 100%;
}

/* 12-Column Grid System */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xxl);
}

.grid-col-4 {
  grid-column: span 4;
}

.grid-col-6 {
  grid-column: span 6;
}

.grid-col-8 {
  grid-column: span 8;
}

.grid-col-12 {
  grid-column: span 12;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-forest-green);
  text-decoration: none;
  letter-spacing: 1px;
}

.logo:hover {
  color: var(--color-ochre);
  border-bottom: none;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
}

nav a {
  font-size: 1rem;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
  transition: all 0.3s ease;
}

nav a:hover,
nav a.active {
  color: var(--color-forest-green);
  border-bottom: 2px solid var(--color-forest-green);
}

body {
  padding-top: 80px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  width: 100%;
  min-height: 600px;
  background-color: var(--color-warm-ivory);
  padding: var(--spacing-xxl) 0;
  margin-bottom: var(--spacing-xxl);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hero-text h1 {
  margin-bottom: var(--spacing-md);
  font-size: 3.5rem;
}

.hero-text p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

.hero-image {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, var(--color-forest-green), var(--color-ochre));
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================
   SECTION STYLES
   ============================================ */

section {
  width: 100%;
  padding: var(--spacing-xxl) 0;
  margin-bottom: var(--spacing-xl);
}

section.alt-bg {
  background-color: var(--color-warm-ivory);
}

section.accent-bg-ochre {
  background-color: rgba(184, 149, 106, 0.08);
}

section.accent-bg-terracotta {
  background-color: rgba(157, 107, 92, 0.08);
}

section.full-width {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

/* ============================================
   CARD STYLES
   ============================================ */

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.card:hover {
  box-shadow: 0 8px 24px rgba(45, 90, 61, 0.15);
  transform: translateY(-2px);
  border-color: var(--color-ochre);
}

.card-image {
  width: 100%;
  height: 240px;
  background: linear-gradient(135deg, var(--color-forest-green), var(--color-ochre));
  border-radius: var(--radius);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-dark-gray);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

.card-link {
  display: inline-block;
  font-weight: 600;
  color: var(--color-forest-green);
  transition: color 0.3s ease;
}

.card-link:hover {
  color: var(--color-ochre);
}

/* ============================================
   BUTTON STYLES
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-forest-green);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-ochre);
  box-shadow: 0 4px 12px rgba(184, 149, 106, 0.3);
}

.btn-secondary {
  background-color: var(--color-warm-ivory);
  color: var(--color-forest-green);
  border: 1px solid var(--color-ochre);
}

.btn-secondary:hover {
  background-color: var(--color-ochre);
  color: var(--color-white);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-forest-green);
  border: 2px solid var(--color-forest-green);
}

.btn-outline:hover {
  background-color: var(--color-forest-green);
  color: var(--color-white);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--color-forest-green);
  color: var(--color-warm-ivory);
  padding: var(--spacing-xxl) 0;
  margin-top: var(--spacing-xxl);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  margin-top: 0;
  font-size: 1.25rem;
}

.footer-section p,
.footer-section a {
  color: var(--color-warm-ivory);
  font-size: 0.95rem;
  line-height: var(--line-height-relaxed);
}

.footer-section a:hover {
  color: var(--color-ochre);
}

.footer-bottom {
  border-top: 1px solid rgba(232, 220, 200, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--color-warm-ivory);
  font-size: 0.875rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-lg) 0;
}

/* ============================================
   DISCLAIMER BLOCK
   ============================================ */

.disclaimer-block {
  background-color: var(--color-warm-ivory);
  border-left: 4px solid var(--color-ochre);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  border-radius: var(--radius);
}

.disclaimer-block h3 {
  margin-top: 0;
  color: var(--color-forest-green);
}

.disclaimer-block p {
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.disclaimer-block p:last-child {
  margin-bottom: 0;
}

/* ============================================
   FORM STYLES
   ============================================ */

form {
  max-width: 600px;
  margin: var(--spacing-lg) 0;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-weight: 600;
  color: var(--color-dark-gray);
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
}

input[type="text"],
input[type="email"],
input[type="phone"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm);
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="phone"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-forest-green);
  box-shadow: 0 0 0 3px rgba(45, 90, 61, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
  .grid-col-4 {
    grid-column: span 6;
  }
  
  .grid-col-6 {
    grid-column: span 12;
  }
  
  .grid-col-8 {
    grid-column: span 12;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.875rem;
  }
  
  nav ul {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 40px;
  }
  
  .header-content {
    flex-direction: column;
    height: auto;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  nav ul {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  body {
    padding-top: 120px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  p {
    font-size: 1rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .grid {
    gap: var(--spacing-md);
  }
  
  .grid-col-4,
  .grid-col-6,
  .grid-col-8,
  .grid-col-12 {
    grid-column: span 12;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .hero {
    min-height: auto;
    padding: var(--spacing-lg) 0;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-lg { padding-top: var(--spacing-lg); }
.pb-lg { padding-bottom: var(--spacing-lg); }

.hidden { display: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}