:root {
    --bg-color: #ffffff;
    --surface-color: #f8f9fa;
    --text-color: #1a1a1a;
    --text-dim: #606060;
    --accent-color: #1c95ff;
    --accent-hover: #007ae6;
    --border-color: #eeeeee;
    
    --shadow-sm: 0 4px 10px rgba(0,0,0,0.03);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 50px rgba(28, 149, 255, 0.10);

    --radius-sm: 10px;
    --radius-md: 20px;
    --radius-lg: 40px;
    
    --container-width: 1200px;
    /* Zvětšená výška menu pro obří logo */
    --nav-height: 120px; 
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.container { max-width: var(--container-width); margin: 0 auto; padding: 0 2rem; }
h1, h2, h3, h4 { margin-bottom: 1rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 3rem; text-align: center; margin-bottom: 4rem; }

/* --- Navigace (Transparentní základ) --- */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: transparent; /* Zcela průhledná na začátku */
    display: flex;
    align-items: center;
    z-index: 1000;
    transition: all 0.4s ease-in-out; /* Plynulý přechod na scrolled verzi */
}

/* Třída, která se přidá při scrollování (řeší JS) */
nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    height: 90px; /* Při scrollování se menu lehce zmenší */
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* --- ZVĚTŠENÉ LOGO --- */
.logo img {
    height: 100px; /* Obří logo */
    width: auto;
    transition: all 0.4s ease-in-out;
}

/* Když se nav zmenší scrollováním, zmenší se i logo */
nav.scrolled .logo img {
    height: 75px; 
}

.logo:hover img { transform: scale(1.05); }

.nav-links { display: flex; gap: 1.5rem; list-style: none; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text-color); font-weight: 600; padding: 0.8rem 1.2rem; border-radius: var(--radius-md); transition: all 0.3s; }
.nav-links a:not(.btn):hover { color: var(--accent-color); background-color: rgba(28, 149, 255, 0.05); }
.btn-sm { padding: 0.7rem 1.5rem !important; }

/* Hamburger */
.hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 6px; z-index: 1001; padding: 10px; border-radius: var(--radius-sm); transition: background 0.3s; }
.hamburger:hover { background-color: var(--border-color); }
.hamburger .line { width: 28px; height: 3px; background-color: var(--text-color); border-radius: 3px; transition: all 0.3s; }

/* --- Tlačítka --- */
.btn {
    display: inline-block; padding: 1.2rem 3rem; background-color: var(--accent-color); color: #fff;
    text-decoration: none; font-weight: 700; border-radius: 100px; transition: all 0.3s;
    border: 2px solid var(--accent-color); box-shadow: 0 8px 20px rgba(28, 149, 255, 0.15); font-size: 1rem;
}
.btn:hover { background-color: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 12px 30px rgba(28, 149, 255, 0.25); }

/* --- Tlačítka u apartmánů (Airbnb / Booking) --- */
.card-buttons { display: flex; gap: 1rem; width: 100%; justify-content: center; flex-wrap: wrap; margin-top: auto; }
.card-buttons .btn-sm { padding: 0.8rem 1.5rem !important; font-size: 0.9rem; flex: 1; min-width: 110px; text-align: center; box-shadow: none; border-width: 2px; }

.btn-airbnb { background-color: transparent; color: #FF5A5F; border-color: #FF5A5F; }
.btn-airbnb:hover { background-color: #FF5A5F; color: #fff; box-shadow: 0 8px 20px rgba(255, 90, 95, 0.2); }

.btn-booking { background-color: transparent; color: #003580; border-color: #003580; }
.btn-booking:hover { background-color: #003580; color: #fff; box-shadow: 0 8px 20px rgba(0, 53, 128, 0.2); }

/* --- Sekce O nás / Hero --- */
.hero { padding: 16rem 0 10rem; background-color: var(--surface-color); } /* Zvětšený top padding kvůli velkému menu */
.hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: center; }
.hero h1 { font-size: 4rem; margin-bottom: 2rem; }
.hero h1 span { color: var(--accent-color); position: relative; }
.hero h1 span::after { content: ''; position: absolute; bottom: 5px; left: 0; width: 100%; height: 8px; background-color: rgba(28, 149, 255, 0.15); border-radius: 4px; }
.hero .subtitle { font-size: 1.4rem; color: var(--text-dim); margin-bottom: 3.5rem; max-width: 600px; }
.hero-about-card { background: var(--bg-color); padding: 3rem; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--border-color); }
.hero-about-card h3 { color: var(--accent-color); font-size: 1.8rem; }

/* --- Byty --- */
.apartments { padding: 8rem 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.apartment-card { background: var(--bg-color); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-color); transition: all 0.4s; display: flex; flex-direction: column; }
.apartment-card:hover { transform: translateY(-10px) scale(1.02); box-shadow: var(--shadow-md); border-color: rgba(28, 149, 255, 0.1); }
.card-image { width: calc(100% - 2rem); height: 280px; overflow: hidden; margin: 1rem; border-radius: calc(var(--radius-md) - 5px); }
.apartment-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.apartment-card:hover img { transform: scale(1.1); }
.card-content { padding: 1rem 2rem 2.5rem; text-align: center; flex-grow: 1; display: flex; flex-direction: column; justify-content: space-between; align-items: center; }
.card-content p { color: var(--text-dim); margin-bottom: 2rem; font-size: 0.95rem; }

/* --- Galerie --- */
.gallery { padding: 8rem 0; background-color: var(--surface-color); }
.bento-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 280px; gap: 1.5rem; }
.bento-item { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.bento-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1); }
.bento-item:hover img { transform: scale(1.08); }
.bento-large { grid-column: span 2; grid-row: span 2; border-radius: var(--radius-lg); }
.bento-wide { grid-column: span 2; }

/* --- Lokace --- */
.location { padding: 8rem 0; }
.map-container { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); border: 4px solid #fff; }
.modern-shadow { box-shadow: var(--shadow-lg); }

/* --- Footer --- */
footer { background-color: var(--surface-color); padding: 6rem 0 2rem; border-top: 1px solid var(--border-color); border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 3rem; margin-bottom: 4rem; }
.footer-col h4 { color: var(--text-color); margin-bottom: 1.5rem; font-size: 1.2rem; }
.footer-col p, .footer-col a { color: var(--text-dim); display: block; margin-bottom: 0.8rem; text-decoration: none; transition: color 0.3s; font-size: 0.95rem; }
.footer-col a:not(.platform-btn):hover { color: var(--accent-color); padding-left: 5px; }
.contact-info .phone, .contact-info .email { font-weight: 600; color: var(--text-color); font-size: 1.1rem; margin-top: 1rem; }
.platform-cards { display: flex; flex-direction: column; gap: 1rem; }
.platform-btn { padding: 1rem !important; border-radius: var(--radius-md) !important; text-align: center; font-weight: 700; transition: transform 0.3s, box-shadow 0.3s; }
.platform-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.airbnb { background-color: #FF5A5F; color: #fff !important; }
.booking { background-color: #003580; color: #fff !important; }
.footer-bottom { text-align: center; padding-top: 2.5rem; border-top: 1px solid var(--border-color); color: var(--text-dim); font-size: 0.9rem; }

/* --- Responzivita --- */
@media (max-width: 1100px) { .hero h1 { font-size: 3rem; } }
@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .bento-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-grid { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
    .hero .subtitle { margin: 0 auto 3.5rem; }
}
@media (max-width: 768px) {
    :root { --radius-lg: 25px; --nav-height: 90px; }
    nav { padding: 0; }
    nav.scrolled { height: 80px; }
    .logo img { height: 80px; } /* Mobilní logo */
    nav.scrolled .logo img { height: 80px; }
    .hamburger { display: flex; margin-right: 1rem;}
    
    .nav-links {
        position: fixed; top: 0; right: -100%; height: 100vh; width: 80%; background: var(--bg-color);
        flex-direction: column; justify-content: center; align-items: center; transition: 0.4s cubic-bezier(0.77, 0, 0.175, 1);
        box-shadow: -10px 0 30px rgba(0,0,0,0.1); border-radius: var(--radius-lg) 0 0 var(--radius-lg); padding: 2rem;
    }
    .nav-links.active { right: 0; }
    .nav-links li { margin: 1rem 0; width: 100%; text-align: center;}
    .nav-links a { font-size: 1.2rem; display: block; width: 100%; }
    
    .hamburger.active .line:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
    .hamburger.active .line:nth-child(2) { opacity: 0; }
    .hamburger.active .line:nth-child(3) { transform: rotate(-45deg) translate(6px, -7px); }

    .grid-3, .footer-grid, .bento-grid { grid-template-columns: 1fr; }
    .bento-grid { grid-auto-rows: 250px; }
    .bento-large, .bento-wide { grid-column: span 1; grid-row: span 1; border-radius: var(--radius-md); }
    
    .hero { padding: 12rem 0 6rem; }
    .hero h1 { font-size: 2.5rem; }
    h2 { font-size: 2.2rem; }
    
    .footer-grid { grid-template-columns: 1fr; text-align: center; gap: 2.5rem; }
    .platform-cards { align-items: center; }
    .platform-btn { width: 100%; max-width: 300px; }
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 280px;
    gap: 1.5rem;
    grid-auto-flow: dense; /* TOTO JE TEN KOUZELNÝ ŘÁDEK */
}

.map-container iframe {
    display: block;
}