/* === INDUSTRIÁLNÍ STYL === */
:root {
    --bg-color: #212121;
    --surface-color: #333333;
    --primary-accent: #D35400;
    --eco-green: #27ae60;
    --text-color: #cccccc;
    --heading-color: #ffffff;
    --border-color: #555555;
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { 
    scroll-behavior: smooth; 
    scroll-padding-top: 120px;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: url('https://www.transparenttextures.com/patterns/concrete-wall.png');
}
.container { max-width: 1100px; margin: auto; padding: 0 20px; }

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--heading-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}
h2 { text-align: center; font-size: 2.5rem; margin-bottom: 60px; }
h4 { font-size: 1.2rem; margin-bottom: 15px; }
section { padding: 100px 0; overflow-x: hidden; border-bottom: 2px solid var(--border-color); }
section:last-of-type, .hero { border-bottom: none; }

/* --- Animace --- */
.animated-element { opacity: 0; transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.fade-in { transform: translateY(30px); }
.animated-element.visible { opacity: 1; transform: translateY(0); }

.slide-in-from-left {
    opacity: 0;
    transform: translateX(-100px);
    transition: opacity 1s ease-out, transform 1s cubic-bezier(0.25, 1, 0.5, 1);
}
.slide-in-from-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* --- Hlavička a navigace --- */
.navbar { background: transparent; padding: 1rem 0; position: fixed; width: 100%; top: 0; z-index: 1000; transition: background-color 0.3s ease; }
.navbar.scrolled, body.subpage .navbar { background-color: rgba(33, 33, 33, 0.95); backdrop-filter: blur(5px); border-bottom: 2px solid var(--border-color); }

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.navbar .logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--heading-color);
    text-decoration: none;
    letter-spacing: 1.5px;
    display: flex;
    align-items: center;
}
.logo-prefix {
    background-color: var(--primary-accent);
    color: #ffffff;
    padding: 6px 12px;
    font-size: 1.1rem;
    margin-right: 15px;
    font-weight: 700;
}

.navbar nav ul { display: flex; list-style: none; }
.navbar nav ul li a { color: var(--text-color); padding: 0.5rem 1rem; text-decoration: none; transition: color 0.3s; font-family: var(--font-heading); letter-spacing: 1px; }
.navbar nav ul li a:hover, .navbar nav ul li a.active { color: var(--primary-accent); }
.dropdown {
    position: relative;
    display: inline-block;
}
.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--surface-color);
    min-width: 220px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    border-top: 2px solid var(--primary-accent);
}
.dropdown-content a {
    color: var(--text-color);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-family: var(--font-body);
}
.dropdown-content a:hover { background-color: #444; }
.dropdown:hover .dropdown-content {
    display: block;
}

.navbar-phone-row {
    flex-basis: 100%;
    text-align: center;
    padding-top: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    font-weight: 700;
}
.phone-separator {
     color: var(--border-color);
}

a.contact-link { color: var(--text-color); font-weight: 700; text-decoration: none; transition: color 0.3s; }
a.contact-link:hover { color: var(--primary-accent); }

/* --- Hero sekce --- */
.hero {
    background:
        repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.2) 10px, rgba(0,0,0,0.2) 12px),
        linear-gradient(rgba(0,0,0,0.7), var(--bg-color)),
        url('https://www.transparenttextures.com/patterns/brushed-alum.png');
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.hero h1 { font-size: 4rem; text-shadow: 2px 2px 10px rgba(0,0,0,0.5); }
.hero p { font-size: 1.2rem; margin: 20px auto 40px; max-width: 600px; }
.btn { display: inline-block; background: var(--primary-accent); color: var(--heading-color); border: none; padding: 15px 40px; text-decoration: none; font-family: var(--font-heading); font-size: 1.1rem; letter-spacing: 2px; text-transform: uppercase; transition: background-color 0.3s, transform 0.2s; cursor: pointer; }
.btn:hover { background-color: #E67E22; transform: translateY(-2px); }

/* --- Mřížka v sortimentu na hlavní stránce --- */
#sortiment { background-color: var(--surface-color); }
.sortiment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.sortiment-card {
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    padding: 30px;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.sortiment-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-accent);
}
.sortiment-card i {
    font-size: 2.5rem;
    color: var(--primary-accent);
    margin-bottom: 15px;
}
.sortiment-card h3 {
    color: var(--heading-color);
    font-size: 1.3rem;
    margin: 0;
}

/* --- Styly pro podstránky --- */
.detail-page {
    padding-top: 150px;
}
.detail-header {
    display: flex;
    align-items: center;
    gap: 30px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 30px;
    margin-bottom: 40px;
}
.detail-header i {
    font-size: 3.5rem;
    color: var(--primary-accent);
}
.detail-header h1 {
    font-size: 3rem;
    margin: 0;
}
.detail-content {
    max-width: 900px;
}
.btn-back {
    margin-top: 40px;
    background-color: var(--surface-color);
}
.product-list {
    list-style: none;
    padding-left: 0;
    margin-top: 15px;
}
.product-list li {
    padding-left: 1.3em;
    text-indent: -1.3em;
    margin-bottom: 5px;
}
.product-list li::before {
    content: "\f105"; 
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--primary-accent);
    margin-right: 10px;
}
.product-list strong {
    color: var(--heading-color);
    font-family: var(--font-heading);
    letter-spacing: 1px;
    text-transform: none;
}
.product-description {
    font-style: italic;
    font-size: 0.95rem;
    color: var(--text-color);
    padding-left: 1.3em;
    margin-top: 5px;
    margin-bottom: 10px;
}
.product-description strong {
    color: var(--primary-accent);
    font-style: normal;
}
.product-name {
    color: var(--primary-accent);
}

/* --- Styly pro interaktivní seznam --- */
.interactive-list .product-toggle-btn {
    background: none;
    border: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
    padding: 0;
    text-align: left;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.interactive-list .product-toggle-btn strong {
    color: var(--heading-color);
}
.interactive-list .product-list-item {
    text-indent: 0;
    padding-left: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 10px;
}
.interactive-list .product-list-item:last-child {
    border-bottom: none;
}
.interactive-list .product-list-item::before {
    content: none;
}
.toggle-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-color);
    border-radius: 50%;
    position: relative;
    transition: transform 0.4s ease;
    flex-shrink: 0;
    margin-left: 20px;
}
.toggle-icon::before, .toggle-icon::after {
    content: '';
    position: absolute;
    background-color: var(--text-color);
}
.toggle-icon::before { top: 50%; left: 25%; width: 50%; height: 2px; transform: translateY(-50%); }
.toggle-icon::after { top: 25%; left: 50%; width: 2px; height: 50%; transform: translateX(-50%); transition: transform 0.4s ease; }
.product-toggle-btn.active .toggle-icon {
    transform: rotate(180deg);
}
.product-toggle-btn.active .toggle-icon::after {
    transform: translateX(-50%) rotate(90deg);
}
.product-description-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}
.product-list-nested {
    padding-left: 2.6em;
    list-style: disc;
    margin-top: 10px;
}
        
/* --- Kalkulačka --- */
.calculator {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 20px;
    align-items: flex-end;
}
.calculator input[type="number"] {
    width: 100%;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    padding: 15px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}
.calculator input[type="number"]:focus {
    border-color: var(--primary-accent);
}
.calculator-result {
    margin-top: 20px;
    font-size: 1.2rem;
    color: var(--heading-color);
    font-weight: 700;
}
.calculator-result span {
    color: var(--primary-accent);
}

/* --- Služby --- */
#sluzby { background-color: var(--bg-color); }
.services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.service-item i { font-size: 2.5rem; color: var(--primary-accent); margin-bottom: 1.5rem; }

/* --- Sekce Ekologie --- */
#eco {
    background-color: var(--bg-color);
    padding: 60px 0;
}
.eco-content {
    text-align: center;
}
.eco-content i {
    font-size: 2.5rem;
    color: var(--eco-green);
    margin-bottom: 15px;
}
.eco-content h3 {
    font-size: 1.8rem;
}
.eco-content p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-color);
}

/* --- Kontakt --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; align-items: flex-start; margin-top: 50px; }
.contact-info ul { list-style: none; }
.contact-info li { display: flex; align-items: flex-start; gap: 20px; margin-bottom: 25px; }
.contact-info li i { font-size: 1.5rem; color: var(--primary-accent); margin-top: 5px; width: 30px; text-align: center; }

.contact-map {
    position: relative;
}
.contact-map iframe { 
    border: 2px solid var(--border-color); 
    filter: grayscale(100%) contrast(1.2) opacity(0.8); 
    width: 100%; 
    height: 450px; 
    display: block;
}
.map-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* --- Kontaktní formulář --- */
.contact-form {
    margin-top: 60px;
    border-top: 2px solid var(--border-color);
    padding-top: 60px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-heading);
    letter-spacing: 1px;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}
.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary-accent);
}
.form-group textarea {
    resize: vertical;
}

/* --- Patička --- */
.footer { text-align: center; padding: 40px 0; color: #888; background-color: #111; }

/* --- Responzivita --- */
@media(max-width: 1100px) {
    .sortiment-grid { grid-template-columns: repeat(3, 1fr); }
}
@media(max-width: 992px) { 
    .navbar nav { display: none; } 
    .sortiment-grid { grid-template-columns: repeat(2, 1fr); }
}
@media(max-width: 768px) { 
    .hero h1 { font-size: 2.8rem; } 
    h2 { font-size: 2rem; } 
    .services-grid, .contact-grid { grid-template-columns: 1fr; } 
    .contact-grid { gap: 2rem; }
    .contact-map { margin-top: 40px; }
    .contact-map iframe { height: 350px; }
    .navbar .logo {font-size: 1rem;} 
    .logo-prefix {font-size: 0.8rem; margin-right: 10px;}
    .calculator-grid { grid-template-columns: 1fr; }
    .navbar-phone-row { display: none; }
    html { scroll-padding-top: 80px; }
    .detail-page { padding-top: 120px; }
}
@media(max-width: 500px) {
    .sortiment-grid { grid-template-columns: 1fr; }
}