:root {
    --neon-purple: #A020F0;
    --lime-green: #32CD32;
    --neon-red: #ff0000;
    --bg-dark: #050505;
    --nav-bg: rgba(15, 15, 15, 0.95);
    --glass: rgba(0, 0, 0, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body { 
    background: linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)), 
                url('img/pozadi.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white; 
    font-family: 'Poppins', sans-serif; 
    overflow-x: hidden;
    min-height: 100vh;
}

#bg-canvas {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; pointer-events: none;
}

/* Navigace */
.top-nav {
    position: fixed;
    top: 20px; left: 50%;
    transform: translateX(-50%);
    background: var(--nav-bg);
    padding: 10px 25px;
    border-radius: 100px;
    z-index: 9999;
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    backdrop-filter: blur(10px);
}

.nav-container { display: flex; gap: clamp(20px, 5vw, 35px); align-items: center; }
.nav-item svg { fill: white; width: 24px; height: 24px; opacity: 0.5; transition: 0.3s; }
.nav-item.active svg {
    fill: var(--lime-green);
    filter: drop-shadow(0 0 8px var(--lime-green));
    opacity: 1;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center; padding: 100px 20px;
}

.hero-content img { 
    width: 85%; 
    max-width: 350px;
    height: auto; 
    margin-bottom: 10px;
    filter: drop-shadow(0 0 20px rgba(160, 32, 240, 0.5));
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@media (min-width: 1024px) {
    .hero-content img { 
        max-width: 800px;
    }
    .hero-content img:hover {
        transform: scale(1.05);
    }
}

.hero-content p {
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(255,255,255,0.3);
    margin-bottom: 10px;
}

/* IP Widget */
.ip-widget {
    margin: 30px auto 0;
    display: inline-block;
    padding: 15px 35px;
    background: rgba(0,0,0,0.6);
    border-radius: 50px;
    font-weight: 800;
    letter-spacing: 1px;
    border: 2px solid var(--lime-green);
    box-shadow: 0 0 15px var(--lime-green), inset 0 0 10px rgba(50, 205, 50, 0.3);
    text-shadow: 0 0 10px var(--lime-green);
    animation: pulse-green 2s infinite;
    -webkit-tap-highlight-color: transparent;
    cursor: pointer;
}

@keyframes pulse-green {
    0% { box-shadow: 0 0 15px var(--lime-green); transform: scale(1); }
    50% { box-shadow: 0 0 25px var(--lime-green), 0 0 10px var(--lime-green); transform: scale(1.02); }
    100% { box-shadow: 0 0 15px var(--lime-green); transform: scale(1); }
}

/* Minihry karty */
.grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 30px; width: 100%; max-width: 1100px; 
}

.mode-card { 
    padding: 40px; 
    text-align: center; 
    background: rgba(0,0,0,0.5);
    border: 2px solid transparent;
    transition: 0.3s;
}

.neon-border-purple { 
    border-color: var(--neon-purple); 
    box-shadow: 0 0 20px rgba(160, 32, 240, 0.5), inset 0 0 10px rgba(160, 32, 240, 0.2); 
}
.neon-border-green { 
    border-color: var(--lime-green); 
    box-shadow: 0 0 20px rgba(50, 205, 50, 0.5), inset 0 0 10px rgba(50, 205, 50, 0.2); 
}
.neon-border-red { 
    border-color: var(--neon-red); 
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.5), inset 0 0 10px rgba(255, 0, 0, 0.2); 
}

.purple-text { color: var(--neon-purple); text-shadow: 0 0 15px var(--neon-purple); }

/* Systém stránek */
section { display: none; width: 100%; }
section.active-page { display: block; animation: fadeIn 0.6s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-container { padding: 120px 5% 60px; min-height: 100vh; display: flex; flex-direction: column; align-items: center; }
.glass { backdrop-filter: blur(20px); border-radius: 25px; }

/* Formulář */
.form-container { max-width: 600px; padding: 2.5rem; margin-top: 30px; border: 2px solid var(--neon-purple); box-shadow: 0 0 20px rgba(160, 32, 240, 0.4); }

.input-group { position: relative; margin-bottom: 1.8rem; width: 100%; }
.input-group input, .input-group textarea {
    width: 100%; padding: 15px; background: rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px; color: white; outline: none; font-size: 16px; font-family: inherit;
}
.input-group label { position: absolute; left: 15px; top: 15px; color: #bbb; transition: 0.3s; pointer-events: none; }
.input-group input:focus ~ label, .input-group input:not(:placeholder-shown) ~ label,
.input-group textarea:focus ~ label, .input-group textarea:not(:placeholder-shown) ~ label {
    top: -12px; left: 10px; font-size: 0.8rem; background: var(--neon-purple); color: white; padding: 2px 10px; border-radius: 5px;
}

.submit-btn {
    width: 100%; padding: 18px; background: var(--neon-purple); color: white; border: none;
    border-radius: 12px; font-weight: 800; cursor: pointer; box-shadow: 0 0 15px var(--neon-purple);
    transition: 0.3s; font-family: inherit;
}
.submit-btn:hover { transform: scale(1.02); filter: brightness(1.2); }

.reveal { opacity: 0; transform: translateY(30px); transition: 0.8s ease-out; }
.reveal.visible { opacity: 1; transform: translateY(0); }

footer { padding: 40px; text-align: center; opacity: 0.6; font-size: 0.8rem; background: rgba(0,0,0,0.3); }

@media (max-width: 600px) {
    .top-nav { width: 92%; top: 10px; }
    .nav-container { gap: 10px; justify-content: space-around; }
    .section-container { padding-top: 100px; }
}