/* TrainQ Design System - Future Premium (Dark Mode) */

:root {
  /* COLORS */
  /* Backgrounds */
  --color-bg-default: #05070C;
  /* Deep Navy/Black */
  --color-bg-subtle: #0A0F1A;
  /* Slightly lighter for sections */
  --color-surface: rgba(255, 255, 255, 0.03);
  /* Glass base */

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-bright: rgba(255, 255, 255, 0.15);

  /* Text */
  --color-text-primary: #FFFFFF;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.45);

  /* Primary (Electric Blue) */
  --color-primary: #2F6BFF;
  --color-primary-hover: #4C7EFF;
  /* Lighter on hover */
  --color-primary-glow: 0 0 24px rgba(47, 107, 255, 0.5);
  --color-on-primary: #FFFFFF;

  /* SPACING SCALE (Unchanged) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* RADII (More rounded for future feel) */
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* SHADOWS & GLOWS */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glow-text: 0 0 12px rgba(255, 255, 255, 0.3);

  /* TYPE SCALE (Inter + Outfit recommended, defaulting to Inter for now) */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --text-h1: clamp(3rem, 5vw, 5rem);
  --text-h2: 2.5rem;
  --text-h3: 1.75rem;
  --text-body: 1.125rem;
  --text-small: 0.875rem;

  --leading-tight: 1.1;
  --leading-normal: 1.6;
}

/* RESET & BASE */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-family-sans);
  color: var(--color-text-primary);
  background-color: var(--color-bg-default);
  line-height: var(--leading-normal);
  scroll-behavior: smooth;
  height: 100%;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg-default);
  overflow-x: hidden;
  position: relative;
}

/* GLOBAL EFFECTS: Grid & Aurora */
body::before {
  /* Grid Overlay */
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
}

body::after {
  /* Aurora Glow Top Center */
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.15) 0%, rgba(5, 7, 12, 0) 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}


h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-primary);
  margin: 0;
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--text-h1);
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

p {
  margin: 0;
  font-size: var(--text-body);
  color: var(--color-text-secondary);
}

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

/* UTILITY LAYOUT */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-sm {
  padding: var(--space-8) 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  :root {
    --text-h1: 4.5rem;
  }
}

/* COMPONENTS */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-8);
  height: 52px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 0 20px rgba(47, 107, 255, 0.4);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(47, 107, 255, 0.6);
}

.btn-primary:active {
  background-color: var(--color-primary-pressed);
  transform: translateY(0);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border);
  color: var(--color-text-primary);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-text-primary);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Navbar */
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  text-shadow: 0 0 15px rgba(47, 107, 255, 0.4);
  letter-spacing: -0.02em;
}

.navbar {
  position: sticky;
  top: 0;
  background-color: rgba(5, 7, 12, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--color-text-primary);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease, border-color 0.3s;
}

.card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--color-border-bright);
  background: rgba(255, 255, 255, 0.05);
}

.card.highlight {
  border-color: var(--color-primary);
  box-shadow: 0 0 30px rgba(47, 107, 255, 0.15), inset 0 0 20px rgba(47, 107, 255, 0.05);
  background: rgba(47, 107, 255, 0.03);
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

/* Accordion (FAQ) */
.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

.accordion-header {
  width: 100%;
  text-align: left;
  padding: var(--space-6) 0;
  background: none;
  border: none;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-content {
  padding-bottom: var(--space-6);
  display: none;
  color: var(--color-text-secondary);
}

.accordion-item.active .accordion-content {
  display: block;
}

/* Footer */
.footer {
  background-color: var(--color-bg-subtle);
  padding: var(--space-16) 0;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-title {
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.footer-link {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

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

/* Forms */
.input-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.input-field {
  padding: 0 var(--space-4);
  height: 52px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  outline: none;
  flex: 1;
  transition: border-color 0.2s;
  min-width: 200px;
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.1);
}

/* Mobile Nav Overlay (Simple) */
.mobile-menu-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  display: block;
  padding: var(--space-2);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Image Components */
.hero-mockup-wrapper {
  margin-top: var(--space-12);
  position: relative;
  max-width: 360px;
  /* Phone size */
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .hero-mockup-wrapper {
    margin-top: 0;
    margin-right: 0;
  }

  .hero {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: var(--space-8);
    text-align: left;
  }

  .hero-actions {
    justify-content: flex-start;
  }
}

.hero-mockup {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
  display: block;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.2) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.feature-img {
  width: 100%;
  max-width: 60%;
  /* "Halb so groß" relative to column */
  margin: 0 auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  display: block;
}

/* Utility */
.text-center {
  text-align: center;
}

.w-full {
  width: 100%;
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}



/* Privacy Policy Specifics */
.page-head {
  margin-bottom: var(--space-8);
}

.meta {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.note {
  background: var(--color-bg-subtle);
  padding: var(--space-4);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  margin: var(--space-4) 0;
  font-size: 0.95rem;
}

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

.kbd {
  background: #eee;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85em;
  color: var(--color-text-primary);
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--space-4);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-8);
}

.tab-btn {
  background: none;
  border: none;
  padding: var(--space-4) var(--space-2);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

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

.tab-btn[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel[hidden] {
  display: none;
}

/* Privacy Content Styling */
article h2 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  font-size: 1.5rem;
  color: var(--color-text-primary);
}

article h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  font-size: 1.125rem;
  color: var(--color-text-primary);
}

article ul,
article ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
  color: var(--color-text-secondary);
}

article li {
  margin-bottom: var(--space-2);
}

article p {
  margin-bottom: var(--space-4);
  line-height: 1.6;
}