/* Základní reset a globální styly */
:root {
    /* Definice barevných proměnných pro snadnou změnu */
    --color-background-dark: #1a1a2e; /* Tmavé pozadí */
    --color-background-light: #f0f2f5; /* Světlé pozadí (pro případný světlý režim) */
    --color-text-light: #e0e0e0; /* Světlý text na tmavém pozadí */
    --color-text-dark: #333; /* Tmavý text na světlém pozadí */
    --color-primary-accent: #00BCD4; /* Zelenomodrá akcentní barva */
    --color-primary-accent-hover: #4DD0E1; /* Světlejší odstín pro najetí myší */
    --color-secondary-accent: #0f3460; /* Tmavší modrá pro kontrast */
    --color-card-background: #2e2e4a; /* Pozadí karet kategorií */
    --color-border: #4a4a6e; /* Barva okrajů */

    /* Definice písem */
    --font-heading: 'Montserrat', sans-serif; /* Písmo pro nadpisy */
    --font-body: 'Merriweather', serif; /* Písmo pro text */
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    transition: background-color 0.3s ease, color 0.3s ease; /* Plynulý přechod barev */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--color-primary-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-primary-accent-hover);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    margin-top: 0;
    margin-bottom: 15px;
}

h1 { font-size: 2.8em; }
h2 { font-size: 2.2em; }
h3 { font-size: 1.8em; }
h4 { font-size: 1.4em; }

/* Styly pro tlačítka */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: bold;
    text-transform: uppercase;
    transition: background-color 0.3s ease, transform 0.2s ease, color 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-primary-accent);
    color: #fff;
    border: none;
}

.btn-primary:hover {
    background-color: var(--color-primary-accent-hover);
    transform: translateY(-2px);
    color: var(--color-background-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary-accent);
    border: 2px solid var(--color-primary-accent);
}

.btn-secondary:hover {
    background-color: var(--color-primary-accent);
    color: #fff;
    transform: translateY(-2px);
}

/* Styly pro hlavní hlavičku */
.main-header {
    background-color: rgba(26, 26, 46, 0.9);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

.site-title {
    margin: 0;
    font-size: 1.8em;
}

.site-title a {
    color: #fff;
    text-decoration: none;
}

.site-logo-container {
    margin-left: 20px;
    margin-right: auto;
}

.header-logo {
    width: 50px;
    height: auto;
    transition: transform 0.3s ease-out;
    cursor: pointer;
}

.header-logo:hover {
    transform: translateY(-5px);
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
}

.main-nav li {
    margin-left: 30px;
}

.main-nav a {
    color: var(--color-text-light);
    font-weight: bold;
    font-size: 1.1em;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--color-primary-accent);
    left: 0;
    bottom: -5px;
    transition: width 0.3s ease-in-out;
}

.main-nav a:hover::after {
    width: 100%;
}

/* Sekce Hero - úvodní část stránky */
.hero-section {
    position: relative;
    min-height: 70vh; /* Změněno z height na min-height pro flexibilitu */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-secondary-accent) 0%, var(--color-background-dark) 100%);
    color: #fff;
    padding: 50px 20px;
}

.hero-content {
    z-index: 1;
    max-width: 800px;
}

.profile-photo-container {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.profile-thumbnail {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-primary-accent);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0 15px rgba(0, 188, 212, 0.5);
}

.profile-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px rgba(0, 188, 212, 0.8);
}

.hero-content h2 {
    font-size: 3.5em;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #fff;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.3em;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-background-visual {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://via.placeholder.com/1920x1080/0f3460/1a1a2e?text=Dynamic+Background+Visual') no-repeat center center/cover;
    opacity: 0.2;
    z-index: 0;
    animation: subtleZoom 20s infinite alternate ease-in-out;
}

@keyframes subtleZoom {
    from { transform: scale(1); }
    to { transform: scale(1.05); }
}

/* Obecné styly sekcí */
section {
    padding: 80px 0;
    text-align: center;
}

section:nth-of-type(even) {
    background-color: var(--color-background-dark);
}

section:nth-of-type(odd) {
    background-color: #22223a;
}

.section-intro {
    font-size: 1.2em;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Sekce kategorií */
.categories-section h3 {
    margin-bottom: 60px;
    font-size: 2.5em;
    color: var(--color-primary-accent);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.category-card {
    background-color: var(--color-card-background);
    padding: 30px;
    border-radius: 10px;
    text-align: left;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 250px;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.card-icon {
    width: 60px;
    height: 60px;
    background-color: var(--color-primary-accent);
    border-radius: 50%;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
    color: #fff;
}

.category-card h4 {
    color: var(--color-primary-accent);
    font-size: 1.5em;
    margin-bottom: 10px;
}

.category-card p {
    font-size: 0.95em;
    color: var(--color-text-light);
    flex-grow: 1;
}

.card-link {
    display: block;
    margin-top: 20px;
    color: var(--color-primary-accent);
    font-weight: bold;
}

/* Sekce služeb - i když je skrytá, ponechávám pro případnou budoucí aktivaci */
.services-section {
    background-color: var(--color-secondary-accent);
    color: #fff;
}

.services-section h3 {
    color: #fff;
    margin-bottom: 60px;
    font-size: 2.5em;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    background-color: rgba(255, 255, 255, 0.15);
}

.service-item h4 {
    color: var(--color-primary-accent);
    font-size: 1.6em;
    margin-bottom: 15px;
}

.service-item p {
    font-size: 1em;
    margin-bottom: 25px;
}

/* Sekce "O mně" */
.about-section {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-background-dark) 0%, var(--color-secondary-accent) 100%);
    color: #fff;
    padding: 50px 20px;
}

/* Patička */
.main-footer {
    background-color: #111;
    color: var(--color-text-light);
    padding: 40px 0;
    text-align: center;
    font-size: 0.9em;
}

.main-footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.social-links img {
    width: 30px;
    height: 30px;
    margin: 0 10px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.social-links img:hover {
    opacity: 1;
}

/* Styly pro Modal (vyskakovací okno s fotografií) */
.photo-modal-overlay {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.photo-modal-content {
    position: relative;
    background-color: var(--color-background-dark);
    margin: auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    max-width: 90%;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.close-modal-btn {
    color: var(--color-text-light);
    font-size: 40px;
    font-weight: bold;
    position: absolute;
    top: 10px;
    right: 20px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal-btn:hover,
.close-modal-btn:focus {
    color: var(--color-primary-accent);
    text-decoration: none;
}

.photo-modal-image {
    max-width: 100%;
    max-height: 80vh;
    display: block;
    border-radius: 5px;
    object-fit: contain;
}

/* Třída pro skrytí sekcí */
.hidden-section {
    display: none!important;
}

/* Responzivní design pro menší obrazovky */
@media (max-width: 768px) {
  .main-header .container {
        flex-direction: column;
        text-align: center;
    }

  .site-logo-container {
        margin: 10px 0;
    }

  .main-nav ul {
        margin-top: 20px;
        flex-direction: column;
        gap: 10px;
    }

  .main-nav li {
        margin-left: 0;
    }

  .hero-content h2, .about-section h3 {
        font-size: 2.5em;
    }

  .hero-content p, .about-section p {
        font-size: 1em;
    }

  .profile-thumbnail {
        width: 80px;
        height: 80px;
    }

  .photo-modal-content {
        padding: 15px;
    }
    
  .close-modal-btn {
        font-size: 30px;
        top: 5px;
        right: 15px;
    }

  .category-grid, .service-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 60px 0;
    }

    section h3 {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
  .site-title {
        font-size: 1.5em;
    }

  .hero-content h2, .about-section h3 {
        font-size: 2em;
    }

  .btn-primary, .btn-secondary {
        padding: 10px 20px;
        font-size: 0.9em;
    }
}