:root {
    --primary-color: #3095d3;
    --secondary-color: #93c748;
    --background-color: #262626;
    --surface-color: #2f2f2f;
    --surface-alt-color: #3a3a3a;
    --text-color: #f5f5f5;
    --muted-text-color: #d0d0d0;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --focus-outline: 2px dashed rgba(147, 199, 72, 0.8);
}

/* Local fonts */
@font-face {
    font-family: 'Josefin Sans';
    src: url('JosefinSans-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Lato';
    src: url('Lato-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

body {
    font-family: 'Lato', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

*, *::before, *::after {
    box-sizing: border-box;
}

:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 3px;
}

.container {
    width: 100%;
    max-width: 1200px;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background-color: var(--primary-color);
    padding: 20px 20px 15px;
    text-align: center;
    position: relative;
}

header h1 {
    font-family: 'Josefin Sans', sans-serif;
    margin: 0;
    font-size: 2.5rem;
}

header p {
    margin: 5px 0 15px;
    font-size: 1.1rem;
    opacity: 0.9;
}

.header-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 15px;
}

#theme-toggle,
#lang-toggle {
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#theme-toggle {
    padding: 10px 20px;
    font-size: 0.95rem;
}

#theme-toggle i {
    font-size: 1.1rem;
}

#lang-toggle {
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    min-width: 180px;
}

#theme-toggle:hover,
#lang-toggle:hover {
    background-color: rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

#theme-toggle:focus-visible,
#lang-toggle:focus-visible {
    background-color: rgba(0, 0, 0, 0.4);
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

nav {
    display: flex;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 10px 0;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 20px;
    margin: 0 10px;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-link:focus-visible {
    background-color: var(--primary-color);
}

.nav-link.active {
    background-color: var(--primary-color);
    font-weight: bold;
}

main {
    padding: 30px;
}

.content-section {
    display: block;
}

body.js-enabled .content-section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

body.js-enabled .content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-family: 'Josefin Sans', sans-serif;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

ul {
    list-style-type: none;
    padding-left: 0;
}

ul li {
    background-color: var(--surface-alt-color);
    padding: 10px 15px;
    margin-bottom: 8px;
    border-left: 4px solid var(--primary-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cert-link {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-left: 15px;
    transition: color var(--transition-speed), transform var(--transition-speed);
}

.cert-link:hover {
    color: var(--primary-color);
    transform: scale(1.2);
}

.contact-prompt {
    text-align: center;
    font-style: italic;
    margin-top: 20px;
    color: var(--secondary-color);
}

.download-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
    margin: 0 auto;
}

.download-form label {
    font-weight: bold;
}

.download-form input,
.download-form button {
    width: 100%;
    padding: 12px;
    border-radius: var(--border-radius);
    border: none;
    font-family: 'Lato', sans-serif;
    font-size: 1rem;
}

.download-form input {
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--text-color);
}

.download-form button {
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-weight: bold;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.download-form button:hover {
    background-color: #7da83a;
    transform: scale(1.02);
}

.file-list {
    margin-top: 20px;
}

.file-item {
    background-color: var(--surface-alt-color);
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid var(--secondary-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-speed);
}

.file-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.file-name {
    font-weight: bold;
}

.file-download-link {
    color: var(--text-color);
    font-size: 1.4rem;
    transition: color var(--transition-speed), transform var(--transition-speed);
}

.file-download-link:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.file-download-link:focus-visible {
    color: var(--primary-color);
    transform: scale(1.08);
}

.file-group {
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    background-color: var(--surface-alt-color);
    padding: 15px;
}

.file-group + .file-item,
.file-item + .file-group {
    margin-top: 10px;
}

.file-group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.file-group-body {
    margin-top: 12px;
    padding-left: 18px;
    border-left: 2px dashed rgba(255, 255, 255, 0.1);
    display: grid;
    gap: 10px;
}

.project-item {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 20px;
    margin-bottom: 25px;
    border-left: 4px solid var(--secondary-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    transition: background-color var(--transition-speed);
}

.project-item:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.project-item h3 {
    color: var(--primary-color);
    margin: 0 0 15px 0;
    font-family: 'Josefin Sans', sans-serif;
}

.project-item p {
    margin: 8px 0;
    line-height: 1.6;
}

.project-downloads {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.project-download-btn {
    background-color: var(--primary-color);
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 18px; /* Zwiększony padding */
    border-radius: var(--border-radius);
    font-size: 0.95rem; /* Lekko większa czcionka */
    display: inline-flex; /* Zmienione na inline-flex */
    align-items: center;
    gap: 10px; /* Zwiększony odstęp */
    transition: background-color var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed); /* Dodany box-shadow do transition */
    border: 1px solid transparent; /* Dodana ramka */
    box-shadow: 0 2px 5px rgba(0,0,0,0.2); /* Dodany cień */
}

.project-download-btn:hover {
    background-color: #2580c0;
    transform: translateY(-3px); /* Mocniejszy efekt podniesienia */
    box-shadow: 0 4px 10px rgba(0,0,0,0.3); /* Zwiększony cień przy hover */
}

.project-download-btn:focus-visible {
    transform: translateY(-3px);
    box-shadow: 0 0 0 3px rgba(48, 149, 211, 0.4);
}

footer {
    background-color: rgba(0, 0, 0, 0.2);
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}

.social-links {
    margin-bottom: 15px;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.8rem;
    margin: 0 15px;
    transition: color var(--transition-speed), transform var(--transition-speed);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

.social-links a:focus-visible {
    color: var(--primary-color);
    transform: translateY(-3px);
}

footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    header {
        padding: 15px;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 0.95rem;
    }

    .header-controls {
        flex-direction: column;
        gap: 8px;
    }

    #theme-toggle,
    #lang-toggle {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    nav {
        flex-direction: column;
        align-items: stretch;
        padding: 10px;
    }

    .nav-link {
        margin: 5px 0;
        justify-content: center;
    }

    main {
        padding: 20px;
    }

    .file-group,
    .file-item {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }

    .project-download-btn {
        width: 100%;
        justify-content: center;
    }

    .file-group-body {
        padding-left: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

@media print {
    body {
        background: #ffffff;
        color: #000000;
        padding: 0;
    }

    .container {
        box-shadow: none;
        background: #ffffff;
        border-radius: 0;
        width: 100%;
    }

    nav,
    footer,
    .project-downloads,
    .social-links {
        display: none !important;
    }

    body:not(.js-enabled) .content-section,
    body.js-enabled .content-section,
    body.js-enabled .content-section.active {
        display: block !important;
    }

    a::after {
        content: " (" attr(href) ")";
        font-size: 0.85em;
    }
}