/**
 * MATRIKY.ONLINE - Hlavní styly
 * Konzervativní design pro starší generaci
 * Mobilní optimalizace
 */

/* ===================================
   ZÁKLADNÍ NASTAVENÍ
   =================================== */

:root {
    /* Barvy - konzervativní paleta */
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #7f8c8d;
    --background: #f8f9fa;
    --card-background: #ffffff;
    --border-color: #dee2e6;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --link-color: #0056b3;
    --link-hover: #003d82;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    
    /* Typografie */
    --font-family: Georgia, 'Times New Roman', serif;
    --font-size-base: 16px;
    --font-size-large: 18px;
    --font-size-xlarge: 20px;
    --line-height: 1.6;
    
    /* Rozestupy */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Rozměry */
    --header-height: 70px;
    --sidebar-width: 280px;
    --max-content-width: 1200px;
    --border-radius: 4px;
    
    /* Stíny */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 2px 6px rgba(0,0,0,0.15);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.18);
}

/* Reset a základní nastavení */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--background);
    min-height: 100vh;
}

/* ===================================
   TYPOGRAFIE
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* ===================================
   LAYOUT
   =================================== */

.container {
    width: 100%;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

/* ===================================
   HLAVIČKA
   =================================== */

.header {
    background-color: var(--primary-color);
    color: white;
    height: var(--header-height);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-lg);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-logo h1 {
    color: white;
    font-size: 1.5rem;
    margin: 0;
}

.header-icon {
    width: 40px;
    height: 40px;
}

.header-nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.header-nav a {
    color: white;
    font-size: var(--font-size-large);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.header-nav a:hover {
    background-color: rgba(255,255,255,0.1);
    text-decoration: none;
}

.header-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(255,255,255,0.1);
    border-radius: var(--border-radius);
}

/* Hamburger menu pro mobil */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* ===================================
   PATIČKA
   =================================== */

.footer {
    background-color: var(--secondary-color);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: white;
}

/* ===================================
   FORMULÁŘE
   =================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: var(--font-size-large);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-large);
    font-family: var(--font-family);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: white;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===================================
   TLAČÍTKA
   =================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-large);
    font-family: var(--font-family);
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.5;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-primary:hover {
    background-color: #1a252f;
    border-color: #1a252f;
}

.btn-secondary {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

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

.btn-block {
    display: block;
    width: 100%;
}

/* ===================================
   KARTY
   =================================== */

.card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: #f8f9fa;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background-color: #f8f9fa;
}

/* ===================================
   TABULKY
   =================================== */

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-large);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--primary-color);
}

.table tr:hover {
    background-color: #f8f9fa;
}

.table-striped tbody tr:nth-child(odd) {
    background-color: #f8f9fa;
}

/* ===================================
   VYHLEDÁVACÍ FORMULÁŘ
   =================================== */

.search-form {
    background-color: var(--card-background);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.search-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.search-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ===================================
   SEZNAM VÝSLEDKŮ
   =================================== */

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.results-count {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
}

.result-item {
    background-color: var(--card-background);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: box-shadow 0.2s ease;
}

.result-item:hover {
    box-shadow: var(--shadow-md);
}

.result-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.result-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.result-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* ===================================
   PAGINACE
   =================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
}

.pagination a,
.pagination span {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-large);
    min-width: 44px;
    text-align: center;
}

.pagination a:hover {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
}

.pagination .active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

/* ===================================
   ZPRÁVY A ALERTY
   =================================== */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    font-size: var(--font-size-large);
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeeba;
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

/* ===================================
   LOADING SPINNER
   =================================== */

.loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0,0,0,0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ===================================
   MOBILNÍ OPTIMALIZACE
   =================================== */

@media (max-width: 768px) {
    :root {
        --font-size-base: 14px;
        --font-size-large: 16px;
        --font-size-xlarge: 18px;
        --spacing-md: 12px;
        --spacing-lg: 16px;
        --spacing-xl: 24px;
    }
    
    .header-container {
        padding: 0 var(--spacing-md);
    }
    
    .header-logo h1 {
        font-size: 1.25rem;
    }
    
    .header-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }
    
    .header-nav.active {
        display: flex;
    }
    
    .header-nav a {
        width: 100%;
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .search-grid {
        grid-template-columns: 1fr;
    }
    
    .search-actions {
        flex-direction: column;
    }
    
    .search-actions .btn {
        width: 100%;
    }
    
    .result-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .result-actions .btn {
        width: 100%;
    }
    
    .table {
        font-size: 0.9rem;
    }
    
    .table th,
    .table td {
        padding: var(--spacing-sm);
    }
    
    /* Responzivní tabulky - scrollování */
    .table-responsive {
        margin-bottom: var(--spacing-lg);
    }
}

/* Extra velké dotykové cíle pro starší uživatele */
@media (max-width: 768px) {
    .btn,
    .form-control,
    .pagination a,
    .pagination span {
        min-height: 44px;
        font-size: var(--font-size-large);
    }
}

/* Landscape orientace na tabletech */
@media (min-width: 768px) and (max-width: 1024px) {
    .container {
        max-width: 100%;
    }
}

/* ===================================
   UTILITY TŘÍDY
   =================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

.fw-bold { font-weight: 600; }
.fw-normal { font-weight: 400; }

/* ===================================
   AUTOCOMPLETE NAŠEPTÁVAČ
   =================================== */

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--card-background);
    border: 2px solid var(--primary-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-lg);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    margin-top: -2px; /* Překryje spodní border inputu */
}

.autocomplete-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-large);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.15s ease;
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background-color: var(--primary-color);
    color: white;
}

.autocomplete-item strong {
    font-weight: 700;
}

/* Zvýraznění pro aktivní input */
.form-control:focus + .autocomplete-dropdown {
    border-color: var(--primary-color);
}

/* Mobilní optimalizace */
@media (max-width: 768px) {
    .autocomplete-dropdown {
        max-height: 250px;
        font-size: var(--font-size-base);
    }

    .autocomplete-item {
        padding: var(--spacing-md);
        min-height: 44px; /* Dostatečně velký dotykový cíl */
    }
}