@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&display=swap');

:root {
    --text-primary: #222;
    --text-secondary: #666;
    --text-links: #381819;
    --bg-main: #FFFBEA;
    --bg-accent-dark: #99BE36;
    --mobile-menu-bg: rgba(40, 40, 40, 0.95);
    --mobile-menu-text-color: #f0f0f0;
    --dropdown-bg-light: white;
    --dropdown-text-light: #381819;
    --dropdown-hover-light: #f0e0d8;
    --body-base-font-size: 16px;
}

body.dark-mode {
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --text-links: #e0e0e0;
    --bg-main: #121212;
    --mobile-menu-bg: rgba(25, 25, 25, 0.98);
    --mobile-menu-text-color: #f8f8f8;
    --dropdown-bg-dark: #2a2a2a;
    --dropdown-text-dark: #e0e0e0;
    --dropdown-hover-dark: #3a3a3a;
}

body.font-size-large {
    --body-base-font-size: 19px;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-main);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-size: var(--body-base-font-size);
}

ul, ol {
    list-style: none;
}

main {
    padding-top: 100px;
}

body.no-scroll {
    overflow: hidden;
}

.site-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 30px 40px 5px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header .logo img {
    height: 30px;
    width: auto;
}

.logo-dark-theme { display: none; }
.logo-light-theme { display: block; }
body.dark-mode .logo-light-theme { display: none; }
body.dark-mode .logo-dark-theme { display: block; }

.main-nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.main-nav a {
    color: var(--text-links);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.2s;
}
.main-nav a:hover {
    color: #ffffff;
}
body.dark-mode .main-nav a:hover {
    opacity: 0.8;
}
.main-nav a:hover::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
}

.site-controls button {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    vertical-align: middle;
    color: var(--text-links);
    font-weight: 600;
    font-size: 1.5rem;
    font-family: 'Montserrat', sans-serif;
    transition: color 0.2s;
}
.site-controls button:hover {
    color: #ffffff;
}
body.dark-mode .site-controls button:hover {
    opacity: 0.8;
}

#theme-toggle-btn img {
    width: 24px;
    height: 24px;
    display: block;
}

.main-nav li.site-controls {
    position: relative;
    display: flex;
    align-items: center;
    gap: 15px;
    padding-bottom: 15px;
    margin-bottom: -15px;
    padding-right: 30px;
    transition: border-color 0.3s ease;
}

.main-nav li.site-controls .font-size-wrapper {
    position: relative;
    display: inline-block;
    vertical-align: middle;
}

.main-nav .lang-dropdown,
.main-nav .font-size-dropdown {
    display: block;
    position: absolute;
    top: 100%;
    background: var(--dropdown-bg-light);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    list-style: none;
    padding: 5px;
    margin: 0;
    border-radius: 4px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s 0.2s;
    width: max-content;
    min-width: 120px;
}

body.dark-mode .main-nav .lang-dropdown,
body.dark-mode .main-nav .font-size-dropdown {
    background: var(--dropdown-bg-dark);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.main-nav .lang-dropdown {
    right: 0;
    left: auto;
}

.main-nav .font-size-dropdown {
    left: 0;
    right: auto;
}

@media (min-width: 769px) {
    .main-nav li.lang:hover > .lang-dropdown,
    .main-nav li.site-controls .font-size-wrapper:hover > .font-size-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        transition-delay: 0s;
    }
    .main-nav .lang-dropdown,
    .main-nav .font-size-dropdown {
        opacity: 0;
        visibility: hidden;
        transform: translateY(-5px);
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s 0.2s;
    }
}

.main-nav .lang-dropdown a,
.main-nav .font-size-dropdown a {
    display: block;
    padding: 8px 12px;
    color: var(--dropdown-text-light);
    white-space: nowrap;
    border-radius: 3px;
}

body.dark-mode .main-nav .lang-dropdown a,
body.dark-mode .main-nav .font-size-dropdown a {
    color: var(--dropdown-text-dark);
}

.main-nav .lang-dropdown a:hover,
.main-nav .font-size-dropdown a:hover {
    background: var(--dropdown-hover-light);
}
body.dark-mode .main-nav .lang-dropdown a:hover,
body.dark-mode .main-nav .font-size-dropdown a:hover {
    background: var(--dropdown-hover-dark);
}

.section {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
    text-align: justify;
}

.footer-logos {
    max-width: 100%;
    margin: 80px 0 0 0;
    background-color: var(--bg-main);
    padding: 10px 20px;
    border-top: 1px solid #eee;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 70px;
    flex-wrap: wrap;
}

.footer-logos img {
    height: 50px;
}

.footer-text {
    text-align: center;
    padding: 20px 0px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

body.dark-mode .footer-logos {
    background-color: var(--bg-accent-dark);
    border-top-color: #444;
}

.mobile-menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    .site-header {
        padding: 15px 20px;
        position: fixed;
        background-color: var(--bg-main);
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }
    body.dark-mode .site-header {
        box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    }
    .site-header .logo img {
        height: 25px;
    }
    .mobile-menu-toggle {
        display: flex;
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1001;
        background: none;
        border: none;
        cursor: pointer;
        flex-direction: column;
        justify-content: space-between;
        width: 28px;
        height: 20px;
        padding: 0;
    }
    .mobile-menu-toggle span {
        display: block;
        height: 3px;
        background: var(--text-primary);
        border-radius: 2px;
        width: 100%;
        transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    }
    .mobile-menu-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .mobile-menu-toggle.open span:nth-child(2) { opacity: 0; }
    .mobile-menu-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        max-width: 300px;
        margin-left: auto;
        background: var(--mobile-menu-bg);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 998;
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55), opacity 0.4s ease, visibility 0s linear 0.4s;
    }
    .main-nav.open {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
        transition-delay: 0s;
    }
    .main-nav ul {
        flex-direction: column;
        align-items: center;
        padding: 0;
    }
    .main-nav li {
        margin: 10px 0;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
    .main-nav.open li { opacity: 1; transform: translateY(0); }
    .main-nav.open li:nth-child(1) { transition-delay: 0.1s; }
    .main-nav.open li:nth-child(2) { transition-delay: 0.15s; }
    .main-nav.open li:nth-child(3) { transition-delay: 0.2s; }
    .main-nav.open li:nth-child(4) { transition-delay: 0.25s; }
    .main-nav.open li:nth-child(5) { transition-delay: 0.3s; }
    .main-nav.open li:nth-child(6) { transition-delay: 0.35s; }
    .main-nav.open li:nth-child(7) { transition-delay: 0.4s; }
    .main-nav.open li:nth-child(8) { transition-delay: 0.45s; }

    .main-nav a {
        color: var(--mobile-menu-text-color);
        font-size: 1.1rem;
        padding: 8px 15px;
        border-radius: 5px;
        transition: background-color 0.2s ease, color 0.2s ease;
    }
    .main-nav a:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--mobile-menu-text-color);
    }
    .main-nav a:hover::after { display: none; }

    .main-nav li.site-controls {
        text-align: center;
        order: unset;
        padding-bottom: 0;
        margin-bottom: 0;
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 20px;
        width: 100%;
        padding: 8px 0;
    }
    .main-nav .lang-dropdown,
    .main-nav .font-size-dropdown {
        position: static;
        display: none;
        box-shadow: none;
        background: transparent;
        margin-top: 3px;
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        width: 100%;
        box-sizing: border-box;
    }
    .main-nav li.lang.open .lang-dropdown,
    .main-nav li.site-controls .font-size-wrapper.open > .font-size-dropdown {
        display: block;
    }
    .main-nav .lang-dropdown a,
    .main-nav .font-size-dropdown a {
        color: var(--mobile-menu-text-color);
        padding: 4px 6px;
        font-size: 0.9rem;
        text-align: center;
    }
    .main-nav .lang-dropdown a:hover,
    .main-nav .font-size-dropdown a:hover {
        background-color: rgba(255, 255, 255, 0.08);
    }
    .font-toggle-btn {
        color: #ffffff !important;
        font-size: 1.1rem;
        padding: 8px 15px;
        border-radius: 5px;
        background: none;
    }
    .font-toggle-btn:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }

    main { padding-top: 60px; }
    .section { padding: 0 15px; }

    .footer-logos {
        flex-wrap: nowrap;
        justify-content: space-around;
        padding: 10px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 10px;
    }
    .footer-logos img {
        height: 35px;
        flex-shrink: 0;
        max-width: 25%;
    }
}

body.font-size-large .hero h1 {
    font-size: 3.2rem;
}
body.font-size-large .hero-subtitle {
    font-size: 1.3rem;
}
body.font-size-large .hero .project-text {
    font-size: 1.25rem;
}
body.font-size-large .split-text p:first-of-type {
    font-size: 1.4rem;
}

@media (max-width: 768px) {
    body.font-size-large .hero h1 {
        font-size: 2.4rem;
    }
    body.font-size-large .hero-subtitle {
        font-size: 1.25rem;
    }
    body.font-size-large .hero .project-text {
        font-size: 1.2rem;
    }
    body.font-size-large .split-text p:first-of-type {
        font-size: 1.3rem;
    }
}

body.no-scroll {
    overflow: hidden;
}