/* ==========================================================================
   Design Tokens
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #000000;
  --color-surface: #0a0a0a;
  --color-surface-elevated: #111111;
  --color-border: #222222;
  --color-text: #ffffff;
  --color-text-muted: #888888;
  --color-text-subtle: #555555;
  --color-accent: #60A5FA;
  --color-accent-hover: #93C5FD;

  /* Gradients */
  --gradient-text: linear-gradient(135deg, #ffffff 0%, #60A5FA 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.1) 0%, transparent 70%);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --font-size-4xl: 4rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 300ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ==========================================================================
   Animations
   ========================================================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--transition-slow),
    transform var(--transition-slow);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for children */
.animate-on-scroll:nth-child(1) {
  transition-delay: 0ms;
}

.animate-on-scroll:nth-child(2) {
  transition-delay: 100ms;
}

.animate-on-scroll:nth-child(3) {
  transition-delay: 200ms;
}

.animate-on-scroll:nth-child(4) {
  transition-delay: 300ms;
}

.animate-on-scroll:nth-child(5) {
  transition-delay: 400ms;
}

.animate-on-scroll:nth-child(6) {
  transition-delay: 500ms;
}

.animate-on-scroll:nth-child(7) {
  transition-delay: 600ms;
}

.animate-on-scroll:nth-child(8) {
  transition-delay: 700ms;
}

@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(96, 165, 250, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3xl) 0;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.hero-tag {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.profile-image-container {
  margin-bottom: var(--space-xl);
}

.profile-image {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 3px solid var(--color-border);
  box-shadow: 0 0 40px rgba(255, 255, 255, 0.1);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.profile-image:hover {
  border-color: var(--color-text-subtle);
  box-shadow: 0 0 60px rgba(255, 255, 255, 0.15);
  transform: scale(1.02);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, var(--font-size-4xl));
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about {
  padding: var(--space-3xl) 0;
  background-color: var(--color-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1.5fr 1fr;
    align-items: center;
  }
}

.section-title {
  font-size: clamp(1.75rem, 5vw, var(--font-size-3xl));
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}

.about-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .about-stats {
    grid-template-columns: 1fr;
  }
}

.stat {
  text-align: center;
  padding: var(--space-lg);
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base);
}

.stat:hover {
  border-color: var(--color-text-subtle);
}

.stat-number {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Process Section
   ========================================================================== */
.process {
  padding: var(--space-3xl) 0;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: var(--space-2xl);
}

.process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .process-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.process-card {
  padding: var(--space-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition:
    border-color var(--transition-base),
    transform var(--transition-base);
}

.process-card:hover {
  border-color: var(--color-text-subtle);
  transform: translateY(-4px);
}

.process-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.process-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.process-card p {
  color: var(--color-text-muted);
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills {
  padding: var(--space-3xl) 0;
  background-color: var(--color-surface);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.skill-tag {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition:
    border-color var(--transition-base),
    background-color var(--transition-base);
}

.skill-tag:hover {
  border-color: var(--color-text-subtle);
  background-color: var(--color-border);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta {
  position: relative;
  padding: var(--space-3xl) 0;
  text-align: center;
  overflow: hidden;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(2rem, 6vw, var(--font-size-3xl));
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.cta-glow {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 400px;
  background: radial-gradient(ellipse at center bottom, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  padding: var(--space-xl) 0;
  text-align: center;
  color: var(--color-text-subtle);
  font-size: var(--font-size-sm);
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 767px) {
  .hero-title br {
    display: none;
  }

  .cta-title br {
    display: none;
  }

  .stat {
    padding: var(--space-md);
  }

  .stat-number {
    font-size: var(--font-size-xl);
  }
}

/* ==========================================================================
   Trust Section
   ========================================================================== */
.trust {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.trust-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
}

.trust-logo {
  height: 32px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.5;
  transition:
    filter var(--transition-base),
    opacity var(--transition-base);
}

.trust-logo:hover {
  filter: none;
  opacity: 1;
}

@media (max-width: 767px) {
  .trust-logos {
    gap: var(--space-lg);
  }

  .trust-logo {
    height: 24px;
    max-width: 100px;
  }
}

/* ==========================================================================
   Schedule Section
   ========================================================================== */
.schedule {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
}

.schedule-content {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.calendar-container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 600px;
}

#my-cal-inline-15-min-chat {
  width: 100%;
  height: 600px;
  overflow: auto;
}

@media (max-width: 767px) {
  .calendar-container {
    min-height: 500px;
    border-radius: var(--radius-md);
  }

  #my-cal-inline-15-min-chat {
    height: 500px;
  }
}

/* ==========================================================================
   Legal Pages (Impressum, Datenschutz)
   ========================================================================== */
.legal-page {
  padding: var(--space-3xl) 0;
  min-height: calc(100vh - 200px);
}

.legal-page h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-xl);
}

.legal-page h2 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.legal-page h3 {
  font-size: var(--font-size-lg);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
  color: var(--color-text-muted);
}

.legal-page p,
.legal-page ul {
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-sm);
}

.legal-page ul {
  padding-left: var(--space-lg);
}

.legal-page li {
  margin-bottom: var(--space-xs);
}

.legal-page a {
  color: var(--color-accent);
  text-decoration: underline;
}

.legal-page a:hover {
  color: var(--color-accent-hover);
}

.back-link {
  display: inline-block;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-xl);
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--color-accent);
}

/* Footer Navigation */
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-nav {
  display: flex;
  gap: var(--space-md);
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-accent);
}

@media (max-width: 767px) {
  .footer .container {
    flex-direction: column;
    text-align: center;
  }
}