:root {
    --brand-primary: #6F4E37;
    --brand-secondary: #808073;
    --brand-light: #E1D3C1;
    --brand-dark: #1A1A1A;

    --ui-background: var(--brand-light);
    --ui-surface: #FAEBD7;
    --ui-text-primary: var(--brand-dark);
    --ui-text-secondary: var(--brand-secondary);
    --key-background: #FAEBD7;
    --key-text: var(--brand-dark);

    --btn-text: #FAEBD7;
}

.dark-theme {
    --brand-primary: #FF991C;
    --brand-secondary: #808073;
    --brand-light: #E1D3C1;
    --brand-dark: #1A1A1A;

    --ui-background: var(--brand-dark);
    --ui-surface: #000000;
    --ui-text-primary: var(--brand-light);
    --ui-text-secondary: var(--brand-secondary);
    --key-background: #000000;
    --key-text: var(--brand-light);

    --btn-text: #1A1A1A;
}

body {
    font-family: 'Alata', sans-serif;
    background-color: var(--ui-background);
    color: var(--ui-text-primary);
    transition: background-color 0.5s ease, color 0.5s ease;
    margin: 0;
    overflow-x: hidden;
}

.text-primary {
    color: var(--ui-text-primary);
}

.text-secondary {
    color: var(--ui-text-secondary);
}

.bg-surface {
    background-color: var(--ui-surface);
}

.bg-primary {
    background-color: var(--brand-primary);
}

/* Styl dla przyklejonego paska nawigacyjnego z efektem glassmorphism */
/* Bazowy nagłówek (na samej górze) */
#mainHeader {
    background-color: transparent;
    border-bottom: 1px solid transparent;
}

/* Nagłówek po przewinięciu strony */
#mainHeader.nav-scrolled {
    background-color: color-mix(in srgb, var(--ui-background) 80%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px); /* Wsparcie dla Safari */
    border-bottom: 1px solid color-mix(in srgb, var(--ui-text-primary) 5%, transparent);
}

.btn-play {
    background-color: var(--brand-primary);
    color: var(--btn-text);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.btn-play:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    opacity: 0.95;
}

.phone-frame {
    border-color: var(--brand-dark);
    background-color: var(--brand-dark);
}

.slide {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
    position: absolute;
    inset: 0;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.blob {
    background-color: var(--brand-primary);
    opacity: 0.15;
    filter: blur(100px);
    transition: background-color 0.5s ease;
}

.icon-fill {
    fill: currentColor;
}

.slide-desc {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
}

.slide-desc.active {
    opacity: 1;
    visibility: visible;
}

body:not(.dark-theme) .dark-img {
    display: none;
}

body.dark-theme .light-img {
    display: none;
}

/* Nowa animacja lewitowania w stylu PixelOS */
@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-12px);
    }

    100% {
        transform: translateY(0px);
    }
}

.floating-animation {
    animation: float 6s ease-in-out infinite;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
}
.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}
.custom-scrollbar::-webkit-scrollbar-thumb {
    background-color: var(--brand-secondary);
    border-radius: 20px;
    opacity: 0.3;
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background-color: var(--brand-primary);
}

/* Animacja przełącznika motywu */
@keyframes theme-icon-pop {
    0% {
        transform: rotate(-90deg) scale(0.5);
        opacity: 0;
    }
    100% {
        transform: rotate(0deg) scale(1);
        opacity: 1;
    }
}

.sun-icon:not(.hidden), 
.moon-icon:not(.hidden) {
    animation: theme-icon-pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}

/* Animacja wysuwania menu mobilnego */
@keyframes slide-down {
    0% {
        opacity: 0;
        transform: translateY(-15px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

#mobileMenu:not(.hidden) {
    animation: slide-down 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transform-origin: top center;
}