/* ==========================================================================
   GLOBAL.CSS - Design systém "Venkovní Schody Premium"
   Architektura pro moderní e-commerce platformu
   ========================================================================== */
/* Zmenšení webu pro počítače pomocí standardní CSS transformace */
@media (min-width: 993px) {
    body {
        overflow-x: hidden;
    }
    
    .page-scaler {
        width: 133.333%; 
        transform: scale(0.75); 
        transform-origin: top left;
        /* Zabrání vzniku prázdného místa na konci stránky po jejím zmenšení */
        margin-bottom: -25%; 
    }
}

:root {
    /* Barevná paleta - Prémiový minimalismus */
    --color-bg-primary: #FAFAFA;
    --color-bg-secondary: #FFFFFF;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #666666;
    --color-accent: #B8860B; /* Prémiová tlumená zlatá/bronzová */
    --color-accent-hover: #9B700A;
    --color-steel: #E2E8F0;
    --color-steel-dark: #475569;
    --color-error: #DC2626;
    --color-success: #16A34A;

    /* Typografie */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-secondary: 'Playfair Display', serif;

    /* Prostorové proměnné (Spacing & Layout) */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    --max-width: 1440px;
    --radius-sm: 4px;
    --radius-md: 8px;
    
    /* Vrstvy (Z-index layers) */
    --z-nav: 1000;
    --z-modal: 2000;
}

/* Úprava proměnných pro mobilní telefony - zabrání rozhození stránky */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 4rem;
    }
}

/* --------------------------------------------------------------------------
   RESET & ZÁKLADNÍ NASTAVENÍ
   -------------------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    scroll-behavior: smooth;
    font-size: 16px;
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    
    /* STRIKTNÍ OCHRANA PROTI VERTIKÁLNÍMU PRUHU A ROZHOZENÍ NA MOBILU */
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

/* --------------------------------------------------------------------------
   TYPOGRAFIE
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5 {
    font-family: var(--font-secondary);
    font-weight: 400;
    color: var(--color-text-primary);
}

h1 { 
    font-size: clamp(2rem, 5vw, 4rem); 
    line-height: 1.1; 
    margin-bottom: var(--spacing-sm); 
}

h2 { 
    font-size: clamp(1.8rem, 3vw, 2.5rem); 
    margin-bottom: var(--spacing-md); 
}

h3 { 
    font-size: 1.5rem; 
    margin-bottom: var(--spacing-sm); 
}

h5 { 
    font-size: clamp(2rem, 5vw, 3rem); 
    line-height: 1.1; 
    margin-bottom: var(--spacing-sm); 
}

p { 
    margin-bottom: var(--spacing-sm); 
    color: var(--color-text-secondary); 
}

/* --------------------------------------------------------------------------
   KOMPONENTY: NAVIGACE
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-steel);
    z-index: var(--z-nav);
    transition: all 0.3s ease;
}

.navbar-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-text-primary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

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

.nav-link {
    text-decoration: none;
    color: var(--color-text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Výrazná ikona a tlačítko pro konfigurátor */
.nav-cta {
    background-color: var(--color-accent);
    color: #FFFFFF!important;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 4px 14px rgba(184, 134, 11, 0.25);
    transition: transform 0.3s, background-color 0.3s, box-shadow 0.3s;
}

.nav-cta:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(184, 134, 11, 0.35);
}

.nav-cta svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Mobilní navigace - Hamburger menu (základní skrytí pro desktop) */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 992px) {
   .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #FFF;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }
   .nav-links.active {
        display: flex;
    }
   .mobile-menu-btn {
        display: block;
    }
}

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

.section {
    padding: var(--spacing-lg) 0;
}

.main-content {
    flex: 1;
    margin-top: 85px; /* Kompenzace fixní navigace */
}

/* --------------------------------------------------------------------------
   KOMPONENTY: FORMULÁŘE A UŽIVATELSKÉ VSTUPY
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    color: var(--color-steel-dark);
}

.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 1px solid var(--color-steel);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text-primary);
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background-color: var(--color-bg-secondary);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.1);
}

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

/* --------------------------------------------------------------------------
   KOMPONENTY: TLAČÍTKA
   -------------------------------------------------------------------------- */
.btn-primary {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background-color: var(--color-text-primary);
    color: #FFFFFF;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    text-decoration: none;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary:disabled {
    background-color: var(--color-steel);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* --------------------------------------------------------------------------
   KOMPONENTY: PATIČKA (FOOTER)
   -------------------------------------------------------------------------- */
.footer {
    background-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: var(--spacing-lg) 0 var(--spacing-md) 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: var(--spacing-md);
}

.footer-col h4 {
    color: var(--color-bg-secondary);
    font-family: var(--font-primary);
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    display: block;
    color: #A0A0A0;
    text-decoration: none;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    transition: color 0.3s;
}

.footer-link:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    color: #A0A0A0;
    font-size: 0.85rem;
}
/* ==========================================================================
   SPECIFICKÉ STYLY JEDNOTLIVÝCH STRÁNEK (Přesunuto pro lepší výkon)
   ========================================================================== */

/* --- index.html --- */
.hero { position: relative; height: 100vh; display: flex; align-items: center; background: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.8)), url('venkovni-schody-antracit.webp') center/cover no-repeat; background-color: var(--color-steel-dark); color: #FFFFFF; text-align: center; }
.hero-content { max-width: 900px; margin: 0 auto; padding: 0 var(--spacing-md); position: relative; z-index: 2; }
.hero-content h1 { color: #FFFFFF; margin-bottom: var(--spacing-md); text-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.hero-subtitle { color: #E2E8F0; font-size: clamp(1.1rem, 2vw, 1.4rem); margin-bottom: var(--spacing-lg); font-weight: 300; }
.feature-showcase { padding: var(--spacing-lg) 0; overflow: hidden; }
.showcase-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); align-items: center; margin-bottom: var(--spacing-lg); }
.showcase-row:last-child { margin-bottom: 0; }
.showcase-row.reverse { direction: rtl; }
.showcase-row.reverse > * { direction: ltr; }
.showcase-text { padding: 0 5rem; }
.showcase-text h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; line-height: 1.1; margin-bottom: var(--spacing-sm); color: var(--color-text-primary); }
.showcase-text p { font-size: 1.1rem; color: var(--color-text-secondary); max-width: 450px; }
.showcase-image-wrapper { position: relative; border-radius: var(--radius-md); overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.08); aspect-ratio: 1/1; background-color: var(--color-bg-primary); display: flex; align-items: center; justify-content: center; }
.showcase-image-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease; }
.showcase-image-wrapper:hover img { transform: scale(1.05); }
.dark-section { background: linear-gradient(135deg, var(--color-steel-dark) 0%, #2f3b4c 50%, rgba(184, 134, 11, 0.15) 100%); background-color: var(--color-steel-dark); color: #FFFFFF; padding: var(--spacing-lg) 0; text-align: center; position: relative; }
.dark-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, transparent, var(--color-accent), transparent); opacity: 0.5; }
.dark-section h2 { color: #FFFFFF; }
.dark-section p { color: #E2E8F0; }
.finish-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); margin-top: var(--spacing-md); max-width: 950px; margin-left: auto; margin-right: auto; }
.finish-card { display: flex; flex-direction: column; justify-content: flex-start; position: relative; text-align: left; text-decoration: none; background-color: #1a1a1a; border: 1px solid rgba(255,255,255,0.15); padding: var(--spacing-md); border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 9 / 16; background-size: cover; background-position: center; background-repeat: no-repeat; transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease; }
.finish-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(170deg, rgba(30, 41, 59, 0.95) 0%, rgba(30, 41, 59, 0.85) 15%, rgba(30, 41, 59, 0.55) 25%, rgba(30, 41, 59,0.0) 33%); z-index: 1; transition: opacity 0.4s ease; }
.finish-card:hover { transform: translateY(-8px); border-color: var(--color-accent); box-shadow: 0 15px 35px rgba(0,0,0,0.3); }
.finish-card:hover::before { opacity: 0.95; }
.finish-card-content { position: relative; z-index: 2; }
.finish-card h3 { color: #FFFFFF; margin-bottom: 0.75rem; font-size: 1.8rem; }
.finish-card p { color: #E2E8F0; margin-bottom: 1.5rem; line-height: 1.5; }
.read-more { display: inline-flex; align-items: center; color: var(--color-accent); font-weight: 600; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 1px; transition: color 0.3s ease; }
.read-more::after { content: '→'; margin-left: 0.5rem; transition: transform 0.3s ease; }
.finish-card:hover .read-more { color: #FFFFFF; }
.finish-card:hover .read-more::after { transform: translateX(5px); }
.configurator-cta { background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-steel) 100%); padding: var(--spacing-lg) 0; text-align: center; }

/* --- galerie.html --- */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); grid-auto-rows: 280px; gap: var(--spacing-md, 20px); margin-top: var(--spacing-lg, 40px); }
.gallery-item { border-radius: var(--radius-sm, 8px); overflow: hidden; position: relative; background: var(--color-steel, #ddd); box-shadow: 0 5px 15px rgba(0,0,0,0.05); cursor: pointer; }
.gallery-item.tall { grid-row: span 2; }
.gallery-item.wide { grid-column: span 2; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1); display: block; }
.gallery-item:hover img { transform: scale(1.08); }
.image-overlay { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(0,0,0,0.8)); padding: var(--spacing-sm, 10px) var(--spacing-md, 20px); color: #FFF; opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.gallery-item:hover .image-overlay { opacity: 1; }
.lightbox { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.9); backdrop-filter: blur(5px); align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s ease; }
.lightbox.active { display: flex; opacity: 1; }
.lightbox-img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: 4px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); transform: scale(0.95); transition: transform 0.3s ease; }
.lightbox.active .lightbox-img { transform: scale(1); }
.close-btn { position: absolute; top: 20px; right: 30px; color: rgba(255, 255, 255, 0.6); font-size: 40px; font-family: sans-serif; cursor: pointer; transition: color 0.3s; z-index: 1001; line-height: 1; }
.close-btn:hover { color: #fff; }
.nav-btn { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(255, 255, 255, 0.05); color: rgba(255, 255, 255, 0.7); border: none; width: 50px; height: 50px; border-radius: 50%; font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.3s ease; z-index: 1001; }
.nav-btn:hover { background: rgba(255, 255, 255, 0.2); color: #fff; transform: translateY(-50%) scale(1.1); }
.prev-btn { left: 20px; }
.next-btn { right: 20px; }
.lightbox-caption { position: absolute; bottom: 20px; color: rgba(255, 255, 255, 0.8); font-family: 'Inter', sans-serif; font-size: 16px; text-align: center; width: 100%; }

/* --- kontakt.html --- */
.contact-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--spacing-md); margin-top: var(--spacing-lg); }
.bento-card { background: #FFFFFF; padding: var(--spacing-lg); border-radius: var(--radius-md); border: 1px solid var(--color-steel); box-shadow: 0 4px 15px rgba(0,0,0,0.02); display: flex; flex-direction: column; justify-content: center; }
.bento-large { grid-column: span 8; }
.bento-small { grid-column: span 4; }
.contact-info-item { margin-bottom: var(--spacing-md); }
.contact-info-item h4 { font-family: var(--font-primary); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; color: var(--color-steel-dark); margin-bottom: 0.25rem; }
.contact-info-item p { color: var(--color-text-primary); font-size: 1.1rem; margin: 0; }

/* --- objednavka.html & rekapitulace.html --- */
.checkout-container { display: grid; grid-template-columns: 1.5fr 1fr; gap: var(--spacing-xl); margin-top: var(--spacing-md); }
.checkout-form-section { background: #FFFFFF; padding: var(--spacing-lg); border-radius: var(--radius-md); border: 1px solid var(--color-steel); box-shadow: 0 5px 20px rgba(0,0,0,0.02); }
.summary-card { background: var(--color-bg-primary); padding: var(--spacing-lg); border-radius: var(--radius-md); border: 1px solid var(--color-steel); position: sticky; top: 100px; }
.summary-row { display: flex; justify-content: space-between; border-bottom: 1px solid var(--color-steel); padding: 0.85rem 0; font-size: 0.95rem; }
.summary-row:last-of-type { border-bottom: none; }
.summary-row span { color: var(--color-text-secondary); }
.summary-row strong { color: var(--color-text-primary); font-weight: 600; }
.drawing-container { width: 100%; display: flex; justify-content: center; background: #FFFFFF; border: 1px dashed var(--color-steel-dark); border-radius: var(--radius-sm); padding: 1.5rem; margin: 1.5rem 0; position: relative; }
.drawing-label { position: absolute; top: 10px; left: 10px; font-size: 0.75rem; text-transform: uppercase; color: var(--color-text-secondary); font-weight: 600; }
.form-row { display: flex; align-items: center; margin-bottom: 0.75rem; }
.form-row label { width: 160px; font-weight: 600; font-size: 0.9rem; color: var(--color-text-primary); flex-shrink: 0; }
.form-row input[type="text"], .form-row input[type="email"], .form-row input[type="tel"] { flex: 1; padding: 0.5rem; border: 1px solid var(--color-steel); border-radius: var(--radius-sm); font-family: var(--font-primary); }
.form-row.asterisk { color: var(--color-text-primary); margin-left: 8px; font-weight: bold; }
.delivery-section { display: none; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px dashed var(--color-steel); }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; margin: 1.5rem 0; font-weight: 600; }
.recap-block { margin-bottom: 1.5rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--color-steel); }
.recap-block h3 { font-family: var(--font-primary); font-size: 0.95rem; text-transform: uppercase; letter-spacing: 1px; color: var(--color-accent); margin-bottom: 0.75rem; }
.recap-item { display: flex; justify-content: space-between; margin-bottom: 0.4rem; font-size: 0.95rem; }
.recap-item span:first-child { color: var(--color-text-secondary); }
.recap-item span:last-child { font-weight: 600; color: var(--color-text-primary); text-align: right; }
.price-breakdown { display: flex; flex-direction: column; gap: 0.5rem; margin: 2rem 0; }
.price-line { display: flex; justify-content: space-between; font-size: 0.95rem; color: var(--color-text-secondary); }
.price-line span:last-child { font-weight: 600; color: var(--color-text-primary); }
.total-line { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--color-steel); font-size: 1.4rem; font-weight: 700; color: var(--color-text-primary); }
.total-line span:last-child { color: var(--color-accent); font-size: 1.8rem; }
.deposit-line { font-size: 1.15rem; font-weight: 700; margin-top: 0.5rem; color: var(--color-text-primary); }
.deposit-line span:last-child { color: var(--color-text-primary); font-size: 1.35rem; }

/* Responzivita společná pro specifiké stránky */
@media (max-width: 992px) {
    .showcase-row, .showcase-row.reverse { grid-template-columns: 1fr; direction: ltr; gap: var(--spacing-md); }
    .showcase-text { padding: 0; text-align: center; }
    .showcase-text p { margin: 0 auto; }
    .finish-grid { grid-template-columns: 1fr; max-width: 500px; }
    .contact-grid { grid-template-columns: 1fr; }
    .bento-large, .bento-small { grid-column: span 12; }
    .checkout-container { grid-template-columns: 1fr; }
    .summary-card { position: relative; top: 0; }
}
@media (max-width: 768px) {
    .gallery-item.wide { grid-column: span 1; }
    .nav-btn { width: 40px; height: 40px; font-size: 16px; }
    .prev-btn { left: 10px; }
    .next-btn { right: 10px; }
}
@media (max-width: 600px) {
    .form-row { flex-direction: column; align-items: flex-start; }
    .form-row label { width: 100%; margin-bottom: 0.25rem; }
    .form-row input { width: calc(100% - 20px); }
}
/* ==========================================================================
   MINIMALISTICKÁ NAVIGACE (Konfigurátor, Objednávka, Rekapitulace)
   ========================================================================== */
.config-navbar {
    width: 100%;
    height: 75px;
    background-color: #ffffff;
    border-bottom: 1px solid #eaeaea;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}

.config-navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    height: 100%;
}

.config-nav-brand {
    font-family: 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
    text-decoration: none;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.config-nav-back {
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    color: #1a1a1a;
    text-decoration: none;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.config-nav-back:hover {
    color: #B8860B;
}

@media (max-width: 768px) {
    .config-navbar-container {
        padding: 0 20px;
    }
    .config-nav-brand {
        font-size: 18px;
    }
}