/* ============================================
   BASE RESET & GLOBAL
   ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color var(--transition-speed) var(--transition-ease),
              color var(--transition-speed) var(--transition-ease);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================
   CONTAINER
   ============================================ */

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

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 clamp(16px, 3.5vw, 48px);
  transition: background-color var(--transition-speed) var(--transition-ease),
              border-color var(--transition-speed) var(--transition-ease),
              box-shadow var(--transition-speed) var(--transition-ease);
}

.navbar.scrolled {
  background-color: var(--bg-glass);
  backdrop-filter: var(--navbar-blur);
  -webkit-backdrop-filter: var(--navbar-blur);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  width: 100%;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.navbar__logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-speed) var(--transition-ease);
  white-space: nowrap;
  letter-spacing: 0.01em;
  /* Wenn Logo-Bild vorhanden: img-Tag direkt reinsetzen, diese Styles greifen dann nicht */
}

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

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--transition-speed) var(--transition-ease);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-speed) var(--transition-ease);
}

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

.navbar__link:hover::after,
.navbar__link.active::after {
  width: 100%;
}

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

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed) var(--transition-ease);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-glow);
}

.theme-toggle__icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s, transform 0.3s var(--transition-ease);
}

[data-theme="dark"]  .theme-toggle__icon--dark  { opacity: 1; transform: rotate(0deg); }
[data-theme="dark"]  .theme-toggle__icon--light { opacity: 0; transform: rotate(90deg); }
[data-theme="light"] .theme-toggle__icon--light { opacity: 1; transform: rotate(0deg); }
[data-theme="light"] .theme-toggle__icon--dark  { opacity: 0; transform: rotate(-90deg); }

/* Burger */
.navbar__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-speed) var(--transition-ease);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-ease);
  border: none;
  text-decoration: none;
}

.btn--primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow-md);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow-md);
  filter: brightness(1.1);
}

.btn--ghost {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn--ghost:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px var(--container-padding) 60px;
}

/* Animated blobs */
.hero__blobs {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  animation: blobFloat 12s ease-in-out infinite;
}

[data-theme="light"] .blob {
  opacity: 0.12;
}

.blob--1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #60a5fa, #3b82f6);
  top: -100px;
  right: -100px;
  animation-delay: 0s;
}

.blob--2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, #93c5fd, #bfdbfe);
  bottom: 50px;
  left: -80px;
  animation-delay: -4s;
}

.blob--3 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, #2563eb, #60a5fa);
  top: 40%;
  left: 40%;
  animation-delay: -8s;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.05); }
  66%       { transform: translate(-15px, 20px) scale(0.97); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__name {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 1;
}

.scroll-arrow {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50%       { opacity: 0.3; transform: scaleY(0.7); }
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
  padding: var(--section-padding) 0;
}

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

.section__header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ============================================
   ABOUT
   ============================================ */

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.about__text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.8;
}

.about__image-wrapper {
  aspect-ratio: 4/5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.about__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ============================================
   TAGS (shared)
   ============================================ */

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-secondary);
  background: var(--accent-glow);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.6rem;
  white-space: nowrap;
  transition: all var(--transition-speed) var(--transition-ease);
}

.tag:hover {
  border-color: var(--accent-primary);
  background: var(--accent-glow-md);
}

/* ============================================
   PROJECTS
   ============================================ */

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

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-speed) var(--transition-ease);
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-card__icon {
  font-size: 1.75rem;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
}

.project-card__links {
  display: flex;
  gap: 0.5rem;
}

.icon-link {
  color: var(--text-muted);
  transition: color var(--transition-speed) var(--transition-ease),
              transform var(--transition-speed) var(--transition-ease);
  display: flex;
}

.icon-link:hover {
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

/* ============================================
   CONTACT
   ============================================ */

.contact__wrapper {
  max-width: 600px;
}

.contact__intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-base);
  transition: all var(--transition-speed) var(--transition-ease);
  width: fit-content;
}

.contact-link:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
  transform: translateX(6px);
}

.contact-link__icon {
  display: flex;
  color: var(--accent-primary);
}

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

.footer {
  padding: 2rem var(--container-padding);
  border-top: 1px solid var(--border);
}

.footer__text {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer__name {
  color: var(--accent-primary);
  font-weight: 600;
}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s var(--transition-ease),
              transform 0.65s var(--transition-ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children inside a parent */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

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

@media (max-width: 768px) {
  .navbar__nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-glass);
    backdrop-filter: var(--navbar-blur);
    -webkit-backdrop-filter: var(--navbar-blur);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }

  .navbar__nav.open {
    display: flex;
  }

  .navbar__link {
    padding: 0.75rem var(--container-padding);
    width: 100%;
  }

  .navbar__link::after {
    display: none;
  }

  .navbar__burger {
    display: flex;
  }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .about__image {
    order: -1;
    max-width: 280px;
    margin: 0 auto;
  }

  .hero__cta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .projects__grid,
  .skills__grid {
    grid-template-columns: 1fr;
  }
}