:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6fa;
  --color-text: #1f2430;
  --color-muted: #5a6270;
  --color-primary: #3355ff;
  --color-primary-dark: #2440cc;
  --max-width: 1100px;
  --radius: 10px;
}

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

body {
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid #eaeaea;
  z-index: 10;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 5rem 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(51, 85, 255, 0.12), transparent),
    linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 2.75rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero .accent {
  color: var(--color-primary);
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-photo {
  justify-self: center;
}

.hero-photo img {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  border-radius: 24px;
  border: 4px solid var(--color-bg);
  box-shadow:
    0 0 0 2px rgba(51, 85, 255, 0.35),
    0 20px 45px rgba(31, 36, 48, 0.18);
}

.hero-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2.5rem;
}

.hero-badges li {
  background: var(--color-bg);
  border: 1px solid #dfe3f0;
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-muted);
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn:hover {
  background: var(--color-primary-dark);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Sections */
.section {
  padding: 5rem 0;
}

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

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.section-intro {
  max-width: 720px;
  color: var(--color-muted);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

/* Feature card (KI project) */
.feature-card {
  background: var(--color-bg);
  border: 1px solid #dfe3f0;
  border-left: 5px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 24px rgba(31, 36, 48, 0.06);
}

.feature-tag {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-points {
  margin: 1rem 0 1.25rem;
  padding-left: 1.25rem;
}

.feature-points li {
  margin-bottom: 0.4rem;
}

.btn-instagram {
  margin-top: 0.5rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  background: var(--color-bg-alt);
  border: 1px solid #dfe3f0;
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Skill cards */
.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--color-bg);
  border: 1px solid #dfe3f0;
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skill-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

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

/* Initiative grid */
.initiative-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.initiative-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.initiative-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.5;
  margin-bottom: 0.5rem;
}

.initiative-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

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

/* Ehrenamt split layout */
.split {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.stat-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid #dfe3f0;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.stat-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  color: var(--color-muted);
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .split {
    grid-template-columns: 1fr;
  }
}

/* Timeline (experience & education) */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.timeline-item {
  background: var(--color-bg);
  border: 1px solid #eaeaea;
  border-radius: var(--radius);
  padding: 1.5rem;
}

.section.alt .timeline-item {
  background: var(--color-bg);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.timeline-header h3 {
  font-size: 1.1rem;
}

.timeline-date {
  color: var(--color-muted);
  font-weight: 600;
  white-space: nowrap;
}

.timeline-item ul {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
}

.timeline-item li {
  margin-bottom: 0.35rem;
}

/* Qualifications */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.qual-card {
  background: var(--color-bg);
  border: 1px solid #eaeaea;
  border-radius: var(--radius);
  padding: 1.5rem;
}

.qual-card h3 {
  margin-bottom: 0.75rem;
}

.qual-card ul {
  padding-left: 1.25rem;
}

.qual-card li {
  margin-bottom: 0.35rem;
}

/* Contact info */
.contact-info {
  list-style: none;
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-weight: 600;
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 480px;
  margin-top: 1.5rem;
}

.contact-form label {
  font-weight: 600;
  margin-top: 0.75rem;
}

.contact-form input,
.contact-form textarea {
  padding: 0.65rem 0.85rem;
  border: 1px solid #d7d9e0;
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
}

.contact-form button {
  margin-top: 1.25rem;
  align-self: flex-start;
}

.form-status {
  margin-top: 1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  text-align: center;
  color: var(--color-muted);
  border-top: 1px solid #eaeaea;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.footer-social {
  font-weight: 600;
  color: var(--color-muted);
}

.footer-social:hover {
  color: var(--color-primary);
}

/* Hero on smaller screens */
@media (max-width: 820px) {
  .hero {
    padding: 4rem 0;
    text-align: center;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-photo {
    order: -1;
  }

  .hero-photo img {
    width: 180px;
    height: 180px;
    max-width: none;
    object-fit: cover;
    object-position: top;
    border-radius: 50%;
  }

  .hero-actions,
  .hero-badges {
    justify-content: center;
  }
}

/* Mobile nav */
@media (max-width: 720px) {
  .hero h1 {
    font-size: 2rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    display: none;
    border-bottom: 1px solid #eaeaea;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-top: 1px solid #eaeaea;
  }

  .nav-links a {
    display: block;
    padding: 1rem 1.5rem;
  }
}