/* ========================================
   MODERNNÝ CSS PRE TZB PROJEKTING
   ======================================== */

/* CSS Variables (Custom Properties) */
:root {
    /* Colors */
    --primary-color: #2c3e50;
    --primary-light: #34495e;
    --accent-color: #e74c3c;
    --accent-light: #ecf0f1;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --border-color: #bdc3c7;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --success: #27ae60;
    --error: #e74c3c;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-unit: 1rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --border-radius: 4px;
    --border-radius-lg: 8px;

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* Breakpoints */
    --mobile: 576px;
    --tablet: 768px;
    --desktop: 992px;
    --wide: 1200px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--white);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

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

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

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

ul, ol {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-sm);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   NAVIGATION BAR
   ======================================== */

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.logo {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: var(--accent-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    font-size: 1.5rem;
    flex-direction: column;
    gap: 0.3rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   TOP LAYER HEADER (s logom a obrázkami)
   ======================================== */

.top-layer {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 3rem;
}

.top-layer.index-layer {
    background-image: url('images/Layer_top_tit_01.jpg');
}

.top-layer.page1-layer {
    background-image: url('images/Layer_top_tzb_01.jpg');
}

.top-layer.page2-layer {
    background-image: url('images/Layer_top_arch_01.jpg');
}

.top-layer.page3-layer {
    background-image: url('images/Layer_top_ing_01.jpg');
}

.top-layer.page4-layer {
    background-image: url('images/Layer_top_kontakt_01.jpg');
}



/* ========================================
   MAIN CONTAINER
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md) 3rem;
}

/* ========================================
   SECTIONS
   ======================================== */

.content-section {
    margin-bottom: 4rem;
}

.content-section h2 {
    margin-bottom: var(--spacing-xl);
}

.content-section p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========================================
   SERVICES GRID
   ======================================== */

.services {
    margin-bottom: 4rem;
}

.services h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .service-image img {
    transform: scale(1.05);
}

.service-card h3 {
    padding: var(--spacing-lg);
    margin: 0 0 var(--spacing-md) 0;
}

.service-card p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   SERVICE DETAIL (Page 1)
   ======================================== */

.services-detail {
    margin-bottom: 4rem;
}

.services-detail h2 {
    margin-bottom: 3rem;
}

.service-detail {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-left: 4px solid var(--accent-color);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius);
}

.service-detail h3 {
    margin-top: 0;
}

.service-detail ul {
    margin-left: var(--spacing-xl);
}

.service-detail li {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   REQUIREMENTS SECTION (Page 2)
   ======================================== */

.requirements-section {
    margin-bottom: 4rem;
}

.requirements-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.requirement-item {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border-top: 3px solid var(--accent-color);
}

.requirement-item h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

.requirement-item ul {
    margin-left: var(--spacing-xl);
    margin-bottom: 0;
}

.requirement-item li {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   SERVICES OFFERED
   ======================================== */

.services-offered h2 {
    margin-bottom: 3rem;
}

.services-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.service-item {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.service-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.service-item h3 {
    margin-top: 0;
    color: var(--accent-color);
}

/* ========================================
   TIMELINE
   ======================================== */

.timeline-section {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    margin-bottom: 4rem;
}

.timeline-content {
    max-width: 600px;
    margin: 0 auto;
}

.timeline-item {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.timeline-item h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-color);
}

.timeline-item p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   EXCLUSIONS SECTION
   ======================================== */

.exclusions-section {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    margin-bottom: 4rem;
    border-left: 4px solid var(--accent-color);
}

.exclusions-section ul {
    margin-bottom: 0;
}

/* ========================================
   GALLERY SECTION
   ======================================== */

.gallery-section {
    margin-bottom: 4rem;
}

.gallery-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.gallery-item {
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item figcaption {
    padding: var(--spacing-md);
    background: var(--primary-color);
    color: var(--white);
    font-size: 0.9rem;
}

/* ========================================
   PROCESS SECTION
   ======================================== */

.process-section {
    margin-bottom: 4rem;
}

.process-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.step {
    text-align: center;
    padding: var(--spacing-xl);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.step h3 {
    margin-bottom: var(--spacing-md);
}

.step p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   PROCESS TIMELINE (Page 3)
   ======================================== */

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.process-item {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.process-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.process-item h3 {
    margin-bottom: var(--spacing-md);
}

.process-item p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   BENEFITS GRID
   ======================================== */

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

.benefit-item {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.benefit-item h3 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

.benefit-item p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   ENGINEERING SERVICES (2-col)
   ======================================== */

.service-grid-2col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-detailed {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--accent-color);
}

.service-detailed h3 {
    color: var(--accent-color);
    margin-top: 0;
}

.service-detailed ul {
    margin-left: var(--spacing-xl);
    margin-bottom: 0;
}

.service-detailed li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

/* ========================================
   EXPERTISE SECTION
   ======================================== */

.expertise-section {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    margin-bottom: 4rem;
}

.expertise-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.expertise-list li {
    list-style: none;
    padding-left: var(--spacing-xl);
    position: relative;
}

.expertise-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

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

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: 4rem;
}

.contact-info {
}

.contact-card {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--accent-color);
}

.contact-card h3 {
    margin-top: 0;
    color: var(--accent-color);
}

.contact-card p {
    margin-bottom: var(--spacing-sm);
}

.contact-card a {
    display: inline-block;
}

.map-container {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* ========================================
   CONTACT FORM
   ======================================== */

.contact-form-section {
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--error);
    background-color: rgba(231, 76, 60, 0.05);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-weight: normal;
    margin-bottom: 0;
}

.checkbox-label input {
    margin-top: 0.35rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.error-message.show {
    display: block;
}

.form-message {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    display: none;
}

.form-message.success {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
    display: block;
}

.form-message.error {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
    display: block;
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq-section {
    margin-bottom: 4rem;
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.faq-item {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--accent-color);
}

.faq-item h3 {
    margin-top: 0;
    color: var(--accent-color);
}

.faq-item p {
    margin-bottom: 0;
    color: var(--text-light);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #c0392b;
    text-decoration: none;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.1rem;
    width: 100%;
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: 3rem var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    margin-bottom: 4rem;
}

.cta h2 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.cta p {
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.cta .btn {
    margin-top: var(--spacing-md);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 3rem var(--spacing-md) 0;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 0.95rem;
}

.footer-section a {
    color: var(--accent-light);
}

.footer-section a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.footer-section ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section li a {
    display: block;
    padding: var(--spacing-xs) 0;
}

.footer-bottom {
    background-color: rgba(0, 0, 0, 0.1);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--accent-light);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
    .top-layer {
        height: 160px;
        margin-bottom: 2rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: var(--spacing-md);
        border-radius: 0;
    }

    .hero {
        padding: 2.5rem var(--spacing-md);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

    .service-grid,
    .services-cards,
    .gallery-grid,
    .process-steps,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-content {
        gap: var(--spacing-xl);
    }

    .btn-large {
        width: 100%;
    }

    .requirements-list,
    .service-grid-2col,
    .expertise-list {
        grid-template-columns: 1fr;
    }

    .process-timeline {
        grid-template-columns: 1fr;
    }
}

/* Mobile (576px and below) */
@media (max-width: 576px) {
    .top-layer {
        height: 120px;
        margin-bottom: 1.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .container {
        padding: 0 var(--spacing-md) 2rem;
    }

    .hero {
        padding: 2rem var(--spacing-md);
        margin-bottom: 2rem;
    }

    .hero-content h1 {
        margin-bottom: var(--spacing-sm);
    }

    .lead {
        font-size: 0.95rem;
    }

    .nav-brand {
        font-size: 1.1rem;
    }

    .hero-content {
        padding: 0;
    }

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

    .cta {
        padding: 2rem var(--spacing-md);
    }

    .footer {
        margin-top: 2rem;
    }

    .footer-content {
        gap: var(--spacing-lg);
        margin-bottom: 1rem;
    }

    .footer-bottom {
        padding: var(--spacing-md);
        font-size: 0.8rem;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .navbar,
    .nav-toggle,
    .cta,
    .footer,
    .contact-form-section {
        display: none;
    }

    body {
        background: white;
    }

    a {
        text-decoration: none;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: more) {
    :root {
        --primary-color: #000000;
        --primary-light: #1a1a1a;
        --text-color: #000000;
        --border-color: #000000;
    }

    .service-card,
    .contact-card {
        border: 2px solid #000000;
    }
}