/* =============================
   Variablen (Farben, Abstände, Schrift)
   ============================= */
:root {
  --color-primary: #3B82F6;
  --color-primary-dark: #2563EB;
  --color-bg-light: #F9FAFB;
  --color-bg-white: #FFFFFF;
  --color-bg-muted: #E5E7EB;
  --color-text-base: #111827;
  --color-text-light: #6B7280;
  --color-border: #D1D5DB;
  --color-btn-bg: var(--color-primary);
  --color-btn-hover-bg: var(--color-primary-dark);
  --color-btn-text: #FFFFFF;
  --transition-fast: 0.3s ease;
  --radius-lg: 1rem;
  --spacing: 1.5rem;
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
}

/* =============================
   Portfolio Section
   ============================= */
.portfolio-section {
  background-color: var(--color-bg-light);
  padding: 6rem 0;
}
.portfolio-section .section-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-text-base);
  text-align: center;
  margin-bottom: 0.5rem;
  position: relative;
}
.portfolio-section .section-title::after {
  content: '';
  width: 4rem;
  height: 0.25rem;
  background: var(--color-primary);
  display: block;
  margin: 0.75rem auto 0;
  border-radius: var(--radius-lg);
}
.portfolio-section .section-intro {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-text-light);
  text-align: center;
  margin: 0 auto 3.5rem;
  max-width: 700px;
  line-height: 1.6;
}

/* =============================
   Grid Layout
   ============================= */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 0 1rem;
}

/* =============================
   Portfolio Item
   ============================= */
.portfolio-item {
  background-color: var(--color-bg-white);
  border: none;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

/* =============================
   Image & Overlay
   ============================= */
.portfolio-image-container {
  position: relative;
  height: 0;
  padding-top: 56.25%;
}
.portfolio-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.portfolio-item:hover .portfolio-image {
  transform: scale(1.12) rotate(1.5deg);
}
.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.75);
  color: var(--color-btn-text);
  opacity: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing);
  transition: opacity var(--transition-fast);
}
.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

/* =============================
   Overlay Content
   ============================= */
.portfolio-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}
.portfolio-category {
  font-size: 0.875rem;
  margin-bottom: 1rem;
  background-color: var(--color-bg-muted);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-lg);
  color: var(--color-text-base);
}
.portfolio-link {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-btn-bg);
  color: var(--color-btn-text);
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.portfolio-link .btn-icon {
  margin-right: 0.5rem;
}
.portfolio-link:hover {
  background-color: var(--color-btn-hover-bg);
  transform: translateY(-2px);
}

/* =============================
   Description
   ============================= */
.portfolio-description {
  padding: var(--spacing);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
}

/* =============================
   No-Projects Fallback
   ============================= */
.no-projects {
  text-align: center;
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-text-light);
  padding: 4rem 1rem;
}

/* =============================
   CTA-Banner
   ============================= */
/* =============================
   CTA-Banner
   ============================= */
.cta-banner {
  /* sanfter Farbverlauf im Hintergrund */
  background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
  color: #FFFFFF;
  padding: 4rem 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* dezente Überlagerungs-Animation */
.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(255,255,255,0.15), transparent 70%);
  animation: rotateBg 20s linear infinite;
}
@keyframes rotateBg {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.cta-banner .container {
  position: relative; /* überlagertes Pseudo-Element wird darunter liegen */
  z-index: 1;
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
}
.cta-banner h2 i {
  margin-right: 0.5rem;
  font-size: 2.25rem;
  animation: bounceIcon 2s infinite;
}
@keyframes bounceIcon {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

.cta-banner p {
  font-family: var(--font-body);
  font-size: 1.125rem;
  margin-bottom: 1.75rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.cta-banner .cta-button {
  display: inline-flex;
  align-items: center;
  background-color: #FFFFFF;
  color: #2563EB;
  font-family: var(--font-heading);
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-lg);
  font-size: 1.125rem;
  text-decoration: none;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.cta-banner .cta-button i {
  margin-right: 0.5rem;
  font-size: 1.25rem;
  transition: transform 0.3s ease;
}
.cta-banner .cta-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}
.cta-banner .cta-button:hover i {
  transform: rotate(20deg) translateX(2px);
}

/* responsive */
@media (max-width: 767px) {
  .cta-banner {
    padding: 3rem 1rem;
  }
  .cta-banner h2 {
    font-size: 2rem;
  }
  .cta-banner p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }
  .cta-banner .cta-button {
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
  }
}


/* =============================
   Responsive Tweaks
   ============================= */
@media (max-width: 767px) {
  .portfolio-section { padding: 4rem 0; }
  .section-title { font-size: 2.5rem; }
  .section-intro { font-size: 1rem; margin-bottom: 2.5rem; }
  .cta-banner { padding: 3rem 1rem; }
  .cta-banner h2 { font-size: 2rem; }
  .cta-banner p { font-size: 1rem; }
}