@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:wght@400;500;600;700&display=swap');

:root {
    /* Default - Light Theme */
    --bg-main: #f9f9f9;
    --bg-alt: #ffffff;
    --text-main: #333333;
    --text-heading: #222222;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --border-color: #dddddd;
    --btn-color: #d32f2f;
    --btn-hover: #b71c1c;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent-color: #f59e0b;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-main: #121212;
    --bg-alt: #1e1e1e;
    --text-main: #e0e0e0;
    --text-heading: #ffffff;
    --nav-bg: rgba(30, 30, 30, 0.95);
    --card-bg: #2a2a2a;
    --input-bg: #333333;
    --border-color: #555555;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
html { scroll-behavior: smooth; }
body { color: var(--text-main); line-height: 1.6; background-color: var(--bg-main); transition: background-color 0.3s, color 0.3s; }

/* --- NAVIGACE --- */
/* --- NAVIGACE --- */
nav { 
    position: fixed; top: 0; width: 100%; height: 70px; 
    background: var(--nav-bg); box-shadow: 0 2px 10px var(--shadow-color); 
    z-index: 1000; padding: 0 40px; 
    display: flex; justify-content: space-between; align-items: center; 
}

.nav-left { display: flex; align-items: center; gap: 30px; }
.logo-container { display: flex; align-items: center; gap: 15px; text-decoration: none; }
.logo-container img { height: 35px; width: auto; }
.logo-container span { font-size: 1.4rem; font-weight: 700; color: var(--btn-color); text-transform: uppercase; }

/* Menu jako seznam */
#nav-menu { list-style: none; display: flex; gap: 25px; align-items: center; }
#nav-menu a { text-decoration: none; color: var(--text-main); font-weight: 500; font-size: 1rem; padding: 15px; display: block; transition: 0.2s; }
#nav-menu a:hover { color: var(--btn-color); }
#nav-menu a.active { color: var(--btn-color) !important; font-weight: 700; border-bottom: 2px solid var(--btn-color); }
#nav-menu a:active { background-color: var(--btn-color); color: #ffffff !important; }

.nav-controls { display: flex; align-items: center; gap: 20px; }
.theme-toggle, .hamburger { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-main); }
.hamburger { display: none; }

/* MOBILNÍ ZOBRAZENÍ */
@media (max-width: 900px) {
    .hamburger { display: block; }
    #nav-menu { 
        display: none; flex-direction: column; position: absolute; top: 70px; left: 0; width: 100%; 
        background: var(--nav-bg); padding: 20px; box-shadow: 0 4px 6px var(--shadow-color); text-align: center;
    }
    #nav-menu.active { display: flex !important; }
}

/* --- HERO SEKCE --- */
header.hero { 
    height: 85vh; 
    min-height: 500px;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1605705652512-421714b74542?auto=format&fit=crop&w=1920') center/cover; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    text-align: center; 
    color: white; 
    padding: 0 20px; 
    margin-top: 70px; /* offset for fixed nav */
}
.hero h1 { font-size: 4rem; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 2px; text-shadow: 2px 2px 5px rgba(0,0,0,0.8); }
.hero p { font-size: 1.3rem; max-width: 800px; margin-bottom: 30px; text-shadow: 1px 1px 3px rgba(0,0,0,0.8); }

.btn { padding: 12px 30px; background-color: var(--btn-color); color: white; text-decoration: none; border-radius: 5px; font-weight: bold; transition: background 0.3s; border: none; cursor: pointer; display: inline-block; font-size: 1rem; }
.btn:hover { background-color: var(--btn-hover); }

/* --- SEKCE A OBSAH --- */
section { padding: 80px 10%; transition: background-color 0.3s; }
.bg-alt { background-color: var(--bg-alt); }
section h2 { text-align: center; font-size: 2.5rem; margin-bottom: 40px; color: var(--text-heading); position: relative; }
section h2::after { content: ''; display: block; width: 60px; height: 3px; background: var(--btn-color); margin: 10px auto 0; }

.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.feature-box { background: var(--card-bg); padding: 40px 30px; border-radius: 8px; box-shadow: 0 5px 15px var(--shadow-color); text-align: center; border-bottom: 5px solid var(--btn-color); transition: transform 0.3s, background-color 0.3s; cursor: pointer; }
.feature-box:hover { transform: translateY(-5px); }
.feature-box i { font-size: 3rem; color: var(--btn-color); margin-bottom: 20px; }
.feature-box h3 { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-heading); }
.feature-box p { color: var(--text-main); }

/* --- ZÁSAHY A AKTUALITY (KARTY) --- */
.news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px; }
.news-card { background: var(--card-bg); border-radius: 8px; overflow: hidden; box-shadow: 0 4px 15px var(--shadow-color); transition: transform 0.3s, box-shadow 0.3s; }
.news-card:hover { transform: translateY(-5px); box-shadow: 0 8px 25px var(--shadow-color); }
.news-img { height: 220px; background-size: cover; background-position: center; }
.news-content { padding: 25px; }
.news-date { display: inline-block; font-size: 0.85rem; color: var(--btn-color); font-weight: 700; margin-bottom: 10px; }
.news-content h3 { font-size: 1.3rem; margin-bottom: 15px; color: var(--text-heading); }
.news-content p { color: var(--text-main); margin-bottom: 20px; }
.news-link { color: var(--btn-color); font-weight: bold; text-decoration: none; transition: color 0.3s; }
.news-link:hover { color: var(--btn-hover); }

/* --- TABULKY --- */
.data-table { width: 100%; border-collapse: collapse; background: var(--card-bg); box-shadow: 0 4px 6px var(--shadow-color); border-radius: 8px; overflow: hidden; margin-top: 20px; }
.data-table th, .data-table td { padding: 15px 20px; text-align: left; border-bottom: 1px solid var(--border-color); color: var(--text-main); }
.data-table th { background-color: var(--nav-bg); color: var(--text-heading); font-weight: 600; text-transform: uppercase; font-size: 0.95rem; }
.data-table tr:hover { background-color: var(--bg-alt); }

.filters { background: var(--card-bg); padding: 20px; border-radius: 8px; margin-bottom: 20px; box-shadow: 0 2px 4px var(--shadow-color); display: flex; gap: 15px; align-items: center; }
.filters select { padding: 10px; border: 1px solid var(--border-color); border-radius: 4px; background: var(--input-bg); color: var(--text-main); font-family: inherit; font-size: 1rem; outline: none; }
.filters select:focus { border-color: var(--btn-color); }

/* --- LIGHTBOX (Modal) pro "otevíratelná okna" --- */
.modal-overlay { display: none; position: fixed; z-index: 3000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.7); justify-content: center; align-items: center; opacity: 0; transition: opacity 0.3s ease; backdrop-filter: blur(5px); }
.modal-overlay.active { display: flex; opacity: 1; }
.modal-content { background: var(--card-bg); padding: 40px; border-radius: 10px; width: 90%; max-width: 800px; max-height: 90vh; overflow-y: auto; box-shadow: 0 10px 30px rgba(0,0,0,0.5); transform: translateY(-20px); transition: transform 0.3s ease, background-color 0.3s; position: relative; }
.modal-overlay.active .modal-content { transform: translateY(0); }
.modal-close { position: absolute; top: 15px; right: 20px; font-size: 30px; font-weight: bold; color: var(--text-main); cursor: pointer; border: none; background: none; transition: color 0.3s; }
.modal-close:hover { color: var(--btn-color); }
.modal-content h3 { color: var(--btn-color); margin-bottom: 15px; font-size: 2rem; border-bottom: 2px solid var(--btn-color); padding-bottom: 10px; display: inline-block; }
.modal-body { margin-top: 20px; color: var(--text-main); font-size: 1.1rem; }

/* --- FOOTER --- */
footer { background: #111; color: #aaa; text-align: center; padding: 25px; }


/* Minimalistický Interface Header */
.app-header {
    margin-top: 80px; /* Navazuje na fixed menu */
    padding: 40px 10%;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.app-header-content h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 5px;
}

.app-breadcrumb {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--btn-color);
    font-weight: 600;
}

/* Tlačítka pro podstránky (volitelné) */
.app-header-actions {
    display: flex;
    gap: 15px;
}

.article-body iframe,
.article-body img {
    max-width: 100%;
    height: auto;
}

/* --- MOBIL --- */
@media(max-width: 768px) {
	
    nav { padding: 15px 20px; }
    .logo-container span { font-size: 1.2rem; }
    .hero h1 { font-size: 2.5rem; }
    
    .hamburger { display: block; }
    nav ul { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: var(--nav-bg); padding: 20px 0; box-shadow: 0 4px 6px var(--shadow-color); text-align: center; }
    nav ul.active { display: flex; }
}

/* --- LIGHTBOX (Zvětšování fotek) --- */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.lightbox.active {
    display: flex;
}

#lightbox-img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 25px;
    right: 35px;
    color: #ffffff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

.lightbox-close:hover {
    color: var(--btn-color);
}