:root {
    --bg-color: #E0E5EC;
    --clay-dark: #a3b1c6;
    --clay-light: #ffffff;
    --text-main: #000000; /* Black text for Soudruzi as requested */
    --text-muted: #4D5C75;
    --accent: #DA5552; /* Brick red */
}

[data-theme="dark"] {
    --bg-color: #1a1d21;
    --clay-dark: #121417;
    --clay-light: #22262b;
    --text-main: #ffffff; /* White text in dark mode for visibility */
    --text-muted: #a0aab5;
    --accent: #ff6b6b;
}

/* Reset and Globals */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}
h1, h2, h3, h4 { font-family: 'Montserrat', sans-serif; }

/* Helpers */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-2 { margin-bottom: 1rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(224, 229, 236, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 2px solid rgba(255,255,255,0.4);
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    transition: background-color 0.3s ease, border-bottom 0.3s ease;
}

[data-theme="dark"] .navbar {
    background-color: rgba(26, 29, 33, 0.85);
    border-bottom: 2px solid rgba(255,255,255,0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.clay-text-logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.75rem;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a:not(.nav-btn) {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    transition: color 0.2s;
}

.nav-links a:hover:not(.nav-btn), .nav-links a.active:not(.nav-btn) {
    color: var(--accent);
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--bg-color);
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    box-shadow: 
        4px 4px 8px var(--clay-dark),
        -4px -4px 8px var(--clay-light);
    margin-left: 0.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.theme-toggle:hover {
    box-shadow: 
        inset 2px 2px 5px var(--clay-dark),
        inset -2px -2px 5px var(--clay-light);
    transform: scale(0.95);
}

/* Claymorphism Buttons */
.clay-button {
    background-color: var(--bg-color);
    border: none;
    border-radius: 12px;
    box-shadow: 
        6px 6px 12px var(--clay-dark),
        -6px -6px 12px var(--clay-light),
        inset 1px 1px 3px rgba(255,255,255,0.7),
        inset -1px -1px 3px rgba(0,0,0,0.02);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0.75rem 1.5rem;
}

[data-theme="dark"] .clay-button {
    box-shadow: 
        6px 6px 12px var(--clay-dark),
        -6px -6px 12px var(--clay-light),
        inset 1px 1px 3px rgba(255,255,255,0.1),
        inset -1px -1px 3px rgba(0,0,0,0.2);
}

.clay-button:hover, .clay-button:active {
    box-shadow: 
        inset 4px 4px 8px var(--clay-dark),
        inset -4px -4px 8px var(--clay-light);
    color: var(--accent);
    transform: scale(0.98);
}

.cta-btn {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    border-radius: 30px;
}

.outline-btn {
    border: 2px solid var(--clay-light);
}

/* Form inputs for Kontakt */
.clay-input {
    width: 100%;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border: none;
    border-radius: 12px;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    box-shadow: 
        inset 4px 4px 8px var(--clay-dark),
        inset -4px -4px 8px var(--clay-light);
    transition: outline 0.2s ease;
}

.clay-input:focus {
    outline: 2px solid var(--accent);
}

/* Claymorphism Cards */
.clay-card {
    background-color: var(--bg-color);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 
        10px 10px 20px var(--clay-dark),
        -10px -10px 20px var(--clay-light),
        inset 2px 2px 6px rgba(255,255,255,0.7),
        inset -2px -2px 6px rgba(0,0,0,0.05);
}

[data-theme="dark"] .clay-card {
    box-shadow: 
        10px 10px 20px var(--clay-dark),
        -10px -10px 20px var(--clay-light),
        inset 2px 2px 6px rgba(255,255,255,0.05),
        inset -2px -2px 6px rgba(0,0,0,0.5);
}

.clay-badge {
    display: inline-block;
    background-color: var(--bg-color);
    border-radius: 50px;
    padding: 0.5rem 1.25rem;
    box-shadow: inset 3px 3px 6px var(--clay-dark), inset -3px -3px 6px var(--clay-light);
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--accent);
}

.clay-circle {
    background-color: var(--bg-color);
    border-radius: 50%;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        5px 5px 12px var(--clay-dark),
        -5px -5px 12px var(--clay-light),
        inset 2px 2px 6px rgba(255,255,255,0.8),
        inset -2px -2px 6px rgba(0,0,0,0.05);
}

[data-theme="dark"] .clay-circle {
    box-shadow: 
        5px 5px 12px var(--clay-dark),
        -5px -5px 12px var(--clay-light),
        inset 2px 2px 6px rgba(255,255,255,0.05),
        inset -2px -2px 6px rgba(0,0,0,0.3);
}

/* Layout Elements */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-main);
}

/* Hero Split layout */
.split-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    min-height: 80vh;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* User wants "Soudruzi jmena v cernem" -> force black for light mode */
.main-heading {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.photo-placeholder {
    height: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    overflow: hidden;
}
.photo-icon { font-size: 4rem; margin-bottom: 1rem; color: var(--clay-dark); }
.photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

/* Pillars / Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.card-icon-wrapper { margin-bottom: 1.5rem; }
.card-icon { font-size: 2rem; }
.clay-card h3 { font-size: 1.4rem; margin-bottom: 1rem; }
.card-text { color: var(--text-muted); }

/* News section */
.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.news-item h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.news-item p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.read-more {
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
}
.read-more:hover { text-decoration: underline; }

/* Program Page Specific */
.program-header {
    padding: 6rem 0 3rem;
}
.program-full-cards {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}
.program-full-card {
    text-align: left;
}
.program-full-card .card-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--clay-light);
}

.program-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.program-list li {
    padding-left: 2rem;
    position: relative;
}

.program-list li::before {
    content: "■";
    color: var(--accent);
    position: absolute;
    left: 0;
    top: 0.1rem;
    font-size: 1.2rem;
}

.program-list strong {
    font-size: 1.2rem;
    color: var(--text-main);
    display: block;
    margin-bottom: 0.25rem;
}

.cta-card {
    max-width: 600px;
    margin: 0 auto;
}
.cta-card h2 { margin-bottom: 1rem; }

/* Footer */
.clay-footer {
    margin-top: 4rem;
    padding: 4rem 2rem 2rem;
    background-color: var(--bg-color);
    box-shadow: inset 0 10px 20px var(--clay-dark), inset 0 2px 5px rgba(0,0,0,0.05);
}

[data-theme="dark"] .clay-footer {
    box-shadow: inset 0 10px 20px var(--clay-dark), inset 0 2px 5px rgba(0,0,0,0.3);
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.footer-links {
    list-style: none;
}
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; transition: color 0.2s;}
.footer-links a:hover { color: var(--accent); }

.socials {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}
.icon-button {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    padding: 0;
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--clay-light);
    padding-top: 2rem;
}

/* Article detail (clanek.html) */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.article-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

/* Hamburger Menu Button */
.hamburger-btn {
    display: none;
    background: var(--bg-color);
    border: none;
    cursor: pointer;
    color: var(--text-main);
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 12px;
    box-shadow: 
        4px 4px 8px var(--clay-dark),
        -4px -4px 8px var(--clay-light);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

[data-theme="dark"] .hamburger-btn {
    box-shadow: 
        4px 4px 8px var(--clay-dark),
        -4px -4px 8px var(--clay-light);
}

.hamburger-btn:active {
    box-shadow: 
        inset 2px 2px 5px var(--clay-dark),
        inset -2px -2px 5px var(--clay-light);
    transform: scale(0.95);
}

/* Mobile */
@media (max-width: 900px) {
    body, html { overflow-x: hidden; width: 100%; }
    
    .split-hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 4rem;
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .container, .nav-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .cards-grid, .news-list, .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-actions { justify-content: center; flex-direction: column; }
    .main-heading { font-size: 2.4rem; word-break: break-word; }
    
    .hamburger-btn {
        display: flex;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-color);
        padding: 2rem;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        border-bottom: 2px solid rgba(255,255,255,0.4);
        z-index: 1000;
        gap: 1.5rem;
        align-items: center;
    }
    
    [data-theme="dark"] .nav-links {
        border-bottom: 2px solid rgba(255,255,255,0.05);
    }
    
    .nav-links.show-mobile-menu {
        display: flex;
    }
}