/* ==========================================================================
   soundtrip.de — Design System & Link Hub Stylesheet
   Audiovisual Physics & Harmonic Loops Aesthetic
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette - HSL Tailored */
  --bg-core: #07070b;
  --bg-surface: rgba(18, 20, 30, 0.65);
  --bg-surface-hover: rgba(28, 32, 48, 0.85);
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --bg-modal: rgba(13, 15, 24, 0.96);

  /* Accents */
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.35);
  --accent-amber: #ffb703;
  --accent-amber-glow: rgba(255, 183, 3, 0.35);
  --accent-violet: #a855f7;
  --accent-violet-glow: rgba(168, 85, 247, 0.35);
  --accent-coral: #ff4d6d;
  --accent-green: #10b981;

  /* Typography */
  --font-display: 'Bebas Neue', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #07070b;

  /* Borders & Shadows */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(0, 240, 255, 0.4);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-card-hover: 0 20px 40px -15px rgba(0, 240, 255, 0.15), 0 0 20px -2px rgba(0, 240, 255, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  /* Layout */
  --container-max-width: 580px;
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  color-scheme: dark;
  font-family: var(--font-sans);
  background-color: var(--bg-core);
  color: var(--text-primary);
  min-height: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  padding: 2.5rem 1.25rem 3rem;
  overflow-x: hidden;
}

/* Canvas Background */
#physics-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0.75;
}

/* Background Ambient Glows */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}

.ambient-glow-1 {
  top: -10vw;
  left: 20%;
  width: 60vw;
  height: 40vw;
  background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
}

.ambient-glow-2 {
  bottom: 5vh;
  right: 15%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--accent-violet), transparent 70%);
}

/* App Container */
.page-container {
  width: 100%;
  max-width: var(--container-max-width);
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* ==========================================================================
   Header Section
   ========================================================================== */

.brand-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
}

.brand-avatar-wrapper {
  position: relative;
  margin-bottom: 0.25rem;
}

.brand-avatar {
  width: 92px;
  height: 92px;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  border: 1.5px solid rgba(255, 255, 255, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 25px -5px var(--accent-cyan-glow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.brand-avatar:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 35px var(--accent-cyan-glow);
}

.brand-avatar img,
.brand-avatar svg {
  width: 54px;
  height: 54px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.brand-title {
  font-family: var(--font-display);
  font-size: 3.25rem;
  letter-spacing: 0.04em;
  line-height: 1;
  color: #ffffff;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
  margin-top: -0.2rem;
}

.brand-tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.45;
  max-width: 440px;
  font-weight: 400;
}

/* ==========================================================================
   Link Cards Grid
   ========================================================================== */

.links-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

/* Base Card Style */
.link-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.05rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), background-color var(--transition-smooth);
  overflow: hidden;
}

.link-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
}

.link-card:hover {
  transform: translateY(-3px);
  background: var(--bg-surface-hover);
  border-color: var(--border-active);
  box-shadow: var(--shadow-card-hover);
}

.link-card:hover::before {
  opacity: 1;
}

.link-card:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* Featured / YouTube Card (Primary Anchor) */
.link-card.featured-card {
  background: linear-gradient(135deg, rgba(255, 0, 0, 0.08) 0%, rgba(20, 24, 38, 0.8) 100%);
  border: 1.5px solid rgba(255, 77, 109, 0.4);
  box-shadow: 0 10px 30px -10px rgba(255, 0, 0, 0.25), 0 0 1px 1px rgba(255, 255, 255, 0.08);
}

.link-card.featured-card:hover {
  border-color: rgba(255, 77, 109, 0.8);
  box-shadow: 0 18px 45px -10px rgba(255, 77, 109, 0.35), 0 0 25px rgba(255, 77, 109, 0.2);
}

/* Disabled / Coming Soon Card */
.link-card.disabled-card {
  opacity: 0.72;
  cursor: default;
  border-style: dashed;
}

.link-card.disabled-card:hover {
  transform: none;
  background: var(--bg-surface);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-card);
}

/* Card Content Structure */
.card-left {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.card-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform var(--transition-fast);
}

.link-card:hover .card-icon-box {
  transform: scale(1.06);
}

.card-icon-box svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* Platform specific icon colors */
.icon-youtube { color: #ff0033; }
.icon-instagram { color: #ff007f; }
.icon-facebook { color: #1877f2; }
.icon-tiktok { color: #00f0ff; }
.icon-ambient { color: #a855f7; }
.icon-kofi { color: #ff5e5b; }

.card-text {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Right Badge / Arrow */
.card-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.card-badge {
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-featured {
  background: rgba(255, 77, 109, 0.15);
  color: #ff4d6d;
  border: 1px solid rgba(255, 77, 109, 0.3);
}

.badge-kofi {
  background: rgba(255, 94, 91, 0.15);
  color: #ff5e5b;
  border: 1px solid rgba(255, 94, 91, 0.3);
}

.badge-coming-soon {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-arrow {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.link-card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--accent-cyan);
}

/* ==========================================================================
   Interactive Showcase / Canvas Control Note
   ========================================================================== */

.showcase-strip {
  width: 100%;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.showcase-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.showcase-tag {
  color: var(--accent-amber);
  font-weight: 600;
}

.canvas-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer & Legal Modal
   ========================================================================== */

.brand-footer {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.footer-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-btn:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
}

.copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Mobile Optimizations */
@media (max-width: 480px) {
  body {
    padding: 1.75rem 1rem 2.5rem;
  }
  
  .brand-title {
    font-size: 2.75rem;
  }
  
  .brand-tagline {
    font-size: 0.92rem;
  }
  
  .link-card {
    padding: 0.95rem 1.05rem;
  }
  
  .card-icon-box {
    width: 42px;
    height: 42px;
  }
  
  .card-title {
    font-size: 0.98rem;
  }
  
  .card-subtitle {
    font-size: 0.78rem;
  }
}

/* ---------------------------------------------------------------
   Legal pages (impressum.html / datenschutz.html)
   --------------------------------------------------------------- */
.legal-page-container {
  width: 100%;
  max-width: 600px;
  margin: 2rem auto;
  background: var(--bg-modal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 10;
  position: relative;
}
.legal-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  font-weight: 500;
  transition: transform var(--transition-fast);
}
.legal-back-link:hover {
  transform: translateX(-3px);
}
.legal-content h1 {
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
  color: #fff;
}
.legal-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}
.legal-content p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}
.legal-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}