/* ===================================================================
   GEMEINSAME STYLES FÜR ALLE PDF-VIEWER SEITEN
   =================================================================== */

/* -------------------------------------------------------------------
   CSS VARIABLEN
   ------------------------------------------------------------------- */
:root {
    /* Hauptfarben */
    --primary-color: #c14545;
    --primary-hover: #a73737;
    --primary-light: #d46767;
    
    /* Hintergründe */
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --bg-dark: #333;
    
    /* Borders */
    --border-light: #ddd;
    --border-medium: #d0d0d0;
    
    /* Text */
    --text-dark: #333;
    --text-light: #666;
    --text-white: #ffffff;
    
    /* Schatten */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.15);

    /* Background Gradient */
    --bg-gradient: linear-gradient(135deg, #2b3aa5 0%, #c13c49 100%);
}

/* -------------------------------------------------------------------
   GRUNDLEGENDES LAYOUT
   ------------------------------------------------------------------- */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-light);
}

/* -------------------------------------------------------------------
   HEADER BEREICH
   ------------------------------------------------------------------- */
.header {
    background-color: var(--bg-light);
    padding: 15px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-direction: column;
}

.header h1 {
    margin: 0 0 8px 0;
    font-size: 3rem;
    width: 100%;
    text-align: center;
    color: black;
    font-weight: 600;
}

.stats {
    text-align: left;
    color: var(--text-light);
    width: 100%;
    margin: 0;
}

/* -------------------------------------------------------------------
   NAVIGATION BEREICH
   ------------------------------------------------------------------- */
.main-navigation {
    background-color: var(--bg-white);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
    box-shadow: var(--shadow-sm);
}

.nav-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-tab {
    background-color: var(--text-light);
    color: var(--text-white);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    transition: background-color 0.2s ease;
    white-space: nowrap;
}

.nav-tab:hover {
    background-color: var(--text-dark);
}

.nav-tab.active {
    background-color: var(--primary-color);
}

.nav-tab.active:hover {
    background-color: var(--primary-hover);
}

/* -------------------------------------------------------------------
   PDF GRID LAYOUT
   ------------------------------------------------------------------- */
.pdf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.pdf-card {
    background: var(--bg-white);
    border-radius: 5px;
    padding: 15px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.pdf-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pdf-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.pdf-info {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 15px;
}

.pdf-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    flex-direction: column;
}

.main-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
}

.ics-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* -------------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------------- */
.btn {
    padding: 8px 16px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
    min-width: 40px;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
}

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

.btn-secondary {
    background-color: var(--text-light);
    color: var(--text-white);
}

.btn-secondary:hover {
    background-color: var(--text-dark);
}

.btn-ics {
    background-color: #ffd700;
    color: #333;
    font-size: 12px;
    font-weight: bold;
    padding: 6px 8px;
    min-width: 35px;
    border: 1px solid #e6c200;
}

.btn-ics:hover {
    background-color: #ffed4e;
    border-color: #d4a800;
}

/* -------------------------------------------------------------------
   EMPTY STATE
   ------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

.empty-state h3 {
    margin-bottom: 10px;
}

/* -------------------------------------------------------------------
   RESPONSIVE DESIGN
   ------------------------------------------------------------------- */

/* Mobile Portrait (bis 540px) */
@media (max-width: 540px) {
    
    .header {
        padding: 5px;
        margin-bottom: 10px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .main-navigation {
        padding: 10px;
        margin-bottom: 10px;
    }
    
    .nav-tabs {
        gap: 8px;
    }
    
    .nav-tab {
        padding: 8px 15px;
        font-size: 13px;
    }
    
    .pdf-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .pdf-card {
        padding: 12px;
    }
}

/* Tablet */
@media (max-width: 768px) {
    .nav-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 5px;
    }
    
    .nav-tab {
        flex-shrink: 0;
    }
}