/**
 * Phi-Fit Universal CSS - Optimierte Version
 * Ein universelles CSS-Stylesheet basierend auf dem Design der Phi-Fit Webseite
 * Aktualisiert: 29.03.2025
 */

/* ====================================================
   1. GRUNDLEGENDE VARIABLEN
   ==================================================== */
   :root {
    /* Farben */
    --primary: #2c8ac5;
    --primary-dark: #235a7a;
    --light: #f8f9fa;
    --success: #28a745;
    --white: #ffffff;
    --dark-gray: #343a40;
    --medium-gray: #6c757d;
    --light-gray: #dee2e6;
    
    /* Abstände */
    --spacing-xs: 0.25rem; /* 4px */
    --spacing-sm: 0.5rem;  /* 8px */
    --spacing-md: 1rem;    /* 16px */
    --spacing-lg: 1.5rem;  /* 24px */
    --spacing-xl: 2rem;    /* 32px */
    --spacing-xxl: 3rem;   /* 48px */
    
    /* Schriftarten und -größen */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    --font-size-xs: 0.75rem;  /* 12px */
    --font-size-sm: 0.875rem; /* 14px */
    --font-size-md: 1rem;     /* 16px */
    --font-size-lg: 1.25rem;  /* 20px */
    --font-size-xl: 1.5rem;   /* 24px */
    --font-size-xxl: 2rem;    /* 32px */
    
    /* Effekte */
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --border-radius-sm: 5px;
    --border-radius-md: 10px;
    --border-radius-lg: 30px;
  }
  
  /* ====================================================
     2. BASIS-STILE & TYPOGRAPHIE
     ==================================================== */
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: var(--font-secondary);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light);
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--dark-gray);
  }
  
  h1 { font-size: var(--font-size-xxl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
  h4 { font-size: var(--font-size-md); }
  h5 { font-size: var(--font-size-sm); }
  
  p {
    margin-bottom: var(--spacing-md);
  }
  
  a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s;
  }
  
  a:hover {
    color: var(--primary-dark);
    text-decoration: none;
  }
  
  .text-primary { color: var(--primary) !important; }
  .text-success { color: var(--success) !important; }
  .text-white { color: var(--white) !important; }
  .text-muted { color: var(--medium-gray) !important; }
  .text-center { text-align: center; }
  .text-right { text-align: right; }
  .text-left { text-align: left; }
  
  /* ====================================================
     3. LAYOUT & CONTAINER
     ==================================================== */
  .container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
  }
  
  .row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
  }
  
  .col, .col-md-3, .col-md-4, .col-md-6, .col-md-8, .col-md-9, .col-lg-4, .col-lg-8 {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
  }
  
  /* Media Queries für Responsive Layout */
  @media (min-width: 576px) {
    .container { max-width: 540px; }
    .modal-dialog { max-width: 500px; margin: 1.75rem auto; }
    .modal-dialog-centered { min-height: calc(100% - 3.5rem); }
  }
  
  @media (min-width: 768px) {
    .container { max-width: 720px; }
    .col-md-3 { flex: 0 0 25%; max-width: 25%; }
    .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
    .col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-md-9 { flex: 0 0 75%; max-width: 75%; }
    .d-md-block { display: block !important; }
    .d-md-none { display: none !important; }
    .text-md-right { text-align: right !important; }
  }
  
  @media (min-width: 992px) {
    .container { max-width: 960px; }
    .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
  }
  
  @media (min-width: 1200px) {
    .container { max-width: 1140px; }
  }
  
  /* ====================================================
     4. HILFSKLASSEN
     ==================================================== */
  /* Margin Klassen */
  .m-0 { margin: 0 !important; }
  .mt-0 { margin-top: 0 !important; }
  .mr-0 { margin-right: 0 !important; }
  .mb-0 { margin-bottom: 0 !important; }
  .ml-0 { margin-left: 0 !important; }
  
  .m-1 { margin: var(--spacing-xs) !important; }
  .mt-1 { margin-top: var(--spacing-xs) !important; }
  .mr-1 { margin-right: var(--spacing-xs) !important; }
  .mb-1 { margin-bottom: var(--spacing-xs) !important; }
  .ml-1 { margin-left: var(--spacing-xs) !important; }
  
  .m-2 { margin: var(--spacing-sm) !important; }
  .mt-2 { margin-top: var(--spacing-sm) !important; }
  .mr-2 { margin-right: var(--spacing-sm) !important; }
  .mb-2 { margin-bottom: var(--spacing-sm) !important; }
  .ml-2 { margin-left: var(--spacing-sm) !important; }
  
  .m-3 { margin: var(--spacing-md) !important; }
  .mt-3 { margin-top: var(--spacing-md) !important; }
  .mr-3 { margin-right: var(--spacing-md) !important; }
  .mb-3 { margin-bottom: var(--spacing-md) !important; }
  .ml-3 { margin-left: var(--spacing-md) !important; }
  
  .m-4 { margin: var(--spacing-lg) !important; }
  .mt-4 { margin-top: var(--spacing-lg) !important; }
  .mr-4 { margin-right: var(--spacing-lg) !important; }
  .mb-4 { margin-bottom: var(--spacing-lg) !important; }
  .ml-4 { margin-left: var(--spacing-lg) !important; }
  
  .m-5 { margin: var(--spacing-xl) !important; }
  .mt-5 { margin-top: var(--spacing-xl) !important; }
  .mb-5 { margin-bottom: var(--spacing-xl) !important; }
  .mx-auto { margin-right: auto !important; margin-left: auto !important; }
  
  /* Padding Klassen */
  .p-0 { padding: 0 !important; }
  .p-1 { padding: var(--spacing-xs) !important; }
  .p-2 { padding: var(--spacing-sm) !important; }
  .p-3 { padding: var(--spacing-md) !important; }
  .p-4 { padding: var(--spacing-lg) !important; }
  .p-5 { padding: var(--spacing-xl) !important; }
  
  .py-1 { padding-top: var(--spacing-xs) !important; padding-bottom: var(--spacing-xs) !important; }
  .py-2 { padding-top: var(--spacing-sm) !important; padding-bottom: var(--spacing-sm) !important; }
  .py-3 { padding-top: var(--spacing-md) !important; padding-bottom: var(--spacing-md) !important; }
  .px-3 { padding-right: var(--spacing-md) !important; padding-left: var(--spacing-md) !important; }
  .py-4 { padding-top: var(--spacing-lg) !important; padding-bottom: var(--spacing-lg) !important; }
  
  /* Flex Klassen */
  .d-flex { display: flex; }
  .flex-column { flex-direction: column; }
  .align-items-center { align-items: center; }
  .justify-content-center { justify-content: center; }
  .justify-content-between { justify-content: space-between; }
  .h-100 { height: 100%; }
  
  /* ====================================================
     5. KOMPONENTEN
     ==================================================== */
  /* Navigation */
  .navbar {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
  }
  
  .navbar-brand {
    font-weight: 700;
    color: var(--primary);
    font-size: var(--font-size-lg);
    text-decoration: none;
  }
  
  .navbar-toggler {
    border: none;
    background-color: transparent;
    cursor: pointer;
    padding: var(--spacing-sm);
  }
  
  .navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
  }
  
  .nav-item { margin-left: var(--spacing-md); }
  .nav-link {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
  }
  .nav-link:hover { color: var(--primary); }
  
  /* Hero-Bereich */
  .hero {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    margin-bottom: var(--spacing-xl);
    margin-top: 76px; /* Entspricht der Navbar-Höhe */
  }
  
  .hero h1 {
    color: white;
    margin-bottom: var(--spacing-md);
  }
  
  .hero p { margin-bottom: var(--spacing-lg); }
  
  /* Background Overlay */
  .bg-overlay {
    background-color: rgba(255, 255, 255, 0.92);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
  }
  
  /* Karten/Cards */
  .card {
    border: none;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s;
    margin-bottom: var(--spacing-md);
    background-color: var(--white);
  }
  
  .card:hover { transform: translateY(-5px); }
  
  /* Optimierte Abstände für bessere Lesbarkeit und Konsistenz */
  .card-body {
    padding: 1.5rem; /* 24px - optimaler Außenabstand */
  }
  
  .card-body h3 {
    margin-bottom: 0.75rem; /* 12px - reduziert von 16px für harmonischere Abstände */
  }
  
  .card-body h3 + p {
    margin-top: 0.5rem; /* 8px - bietet einen angenehmen Abstand zur Überschrift */
  }
  
  .card-body p:last-child {
    margin-bottom: 0; /* Kein Abstand nach dem letzten Absatz */
  }
   
  .card-title { margin-bottom: var(--spacing-sm); }
  .card-text { margin-bottom: var(--spacing-md); }
  
  /* Buttons */
  .btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.5rem 1rem;
    font-size: var(--font-size-md);
    line-height: 1.5;
    border-radius: var(--border-radius-lg);
    transition: all 0.15s ease-in-out;
    cursor: pointer;
  }
  
  .btn:focus, .btn:hover { text-decoration: none; }
  .btn-primary { background-color: var(--primary); border-color: var(--primary); color: white; }
  .btn-primary:hover { background-color: var(--primary-dark); border-color: var(--primary-dark); }
  .btn-light { background-color: var(--light); border-color: var(--light); color: var(--dark-gray); }
  .btn-light:hover { background-color: var(--light-gray); border-color: var(--light-gray); }
  
  .btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
    background-color: transparent;
  }
  .btn-outline-primary:hover { background-color: var(--primary); color: white; }
  
  .btn-outline-success {
    color: var(--success);
    border-color: var(--success);
    background-color: transparent;
  }
  .btn-outline-success:hover { background-color: var(--success); color: white; }
  
  .btn-outline-light {
    color: var(--white);
    border-color: var(--white);
    background-color: transparent;
  }
  .btn-outline-light:hover { background-color: var(--white); color: var(--primary-dark); }
  
  .btn-sm { padding: 0.25rem 0.5rem; font-size: var(--font-size-sm); }
  .btn-lg { padding: 0.75rem 1.5rem; font-size: var(--font-size-lg); }
  .btn-block { display: block; width: 100%; }
  
  /* Listen */
  .list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
    border-radius: var(--border-radius-sm);
  }
  
  .list-group-item {
    position: relative;
    display: block;
    padding: 0.75rem 1.25rem;
    background-color: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.125);
  }
  
  .list-group-item:first-child {
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
  }
  
  .list-group-item:last-child {
    border-bottom-right-radius: inherit;
    border-bottom-left-radius: inherit;
  }
  
  .list-unstyled { padding-left: 0; list-style: none; }
  
  /* Alerts */
  .alert {
    position: relative;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
  }
  
  .alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
  }
  
  /* Icons */
  .principle-icon {
    font-size: var(--font-size-xxl);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
  }
  
  /* Footer */
  .footer {
    background-color: var(--primary-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
  }
  
  .footer-link {
    color: rgba(255, 255, 255, 0.7);
    display: block;
    margin-bottom: var(--spacing-sm);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
  }
  
  .footer-link:hover { color: white; }
  
  .footer hr {
    background-color: var(--light);
    opacity: 0.2;
    margin: var(--spacing-sm) 0;
  }
  
  /* Bilder */
  .img-fluid { max-width: 100%; height: auto; }
  .rounded-circle { border-radius: 50%; }
  
  /* Collapse */
  .collapse { display: none; }
  .collapse.show { display: block; }
  
  /* Modals */
  .modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1050;
    display: none;
    width: 100%;
    height: 100%;
    overflow: hidden;
    outline: 0;
  }
  
  .modal-dialog {
    position: relative;
    width: auto;
    margin: 0.5rem;
    pointer-events: none;
  }
  
  .modal-dialog-centered {
    display: flex;
    align-items: center;
    min-height: calc(100% - 1rem);
  }
  
  .modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: var(--white);
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-md);
    outline: 0;
  }
  
  .modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--light-gray);
    border-top-left-radius: calc(0.3rem - 1px);
    border-top-right-radius: calc(0.3rem - 1px);
  }
  
  .modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: 1.5rem;
    line-height: 1.6;
  }
  
  .modal-body h6 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--primary);
  }
  
  .modal-body h6:first-child { margin-top: 0; }
  
  .close {
    float: right;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    opacity: .5;
    background-color: transparent;
    border: 0;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
  }
  
  /* Spezielle Elemente */
  .book-cover {
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    text-align: center;
  }
  
  .btn-whatsapp {
    background-color: #25d366;
    color: white;
  }
  
  .btn-whatsapp:hover {
    background-color: #128c7e;
  }
  
  /* ====================================================
     6. RESPONSIVE ANPASSUNGEN
     ==================================================== */
  @media (max-width: 992px) {
    .navbar-collapse { display: none; }
    .navbar-collapse.show { display: block; }
    .navbar-nav { flex-direction: column; }
    .nav-item { margin-left: 0; margin-top: var(--spacing-sm); }
  }
  
  @media (max-width: 576px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .hero { padding: var(--spacing-xl) 0; }
    .bg-overlay { padding: var(--spacing-md); }
    
    /* Optimierte Abstände für Mobile-Ansicht */
    .card-body {
      padding: 1.25rem; /* 20px statt 16px - etwas mehr Luft */
    }
    
    .card-body h3 {
      margin-bottom: 0.625rem; /* 10px statt 16px */
    }
    
    .card-body h3 + p {
      margin-top: 0.375rem; /* 6px statt 8px */
    }
    
    p {
      margin-bottom: 0.875rem; /* 14px statt 16px */
      font-size: 16px;
      line-height: 1.7; /* Erhöhte Zeilenhöhe für bessere Lesbarkeit */
    }
    
    .alert { padding: var(--spacing-md); }
  }