/* ==========================================================================
   Base Layout & Container
   ========================================================================== */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    background-color: var(--main-color);
    padding: 10px 0;
    border-bottom: 3px solid var(--nav-bg-color);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px; /* Space between logo and text */
}

.site-logo-img {
    height: 50px;
    width: auto;
}

.site-title-text {
    font-family: 'Lora', serif;
    font-size: 1.8em;
    font-weight: bold;
    color: var(--text-color);
}

/* --- Desktop Navigation --- */
.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 5px;
}

.main-nav a {
    display: block;
    padding: 10px 20px;
    background-color: var(--nav-bg-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    transition: background-color 0.2s;
}

.main-nav a:hover, .main-nav a.active {
    background-color: var(--link-hover-color);
    color: var(--main-color);
}

/* --- Mobile Navigation (Hamburger Menu) --- */
.hamburger-menu { display: none; }
#menu-toggle { display: none; }

.menu-btn {
    display: block;
    cursor: pointer;
    padding: 10px;
}

.menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: all 0.3s;
}

/* ==========================================================================
   Main Content & Page Structure
   ========================================================================== */
.main-content {
    flex-grow: 1;
    padding: 30px 0;
}

.content-wrapper {
    background-color: var(--main-color);
    padding: 30px;
    border-radius: 15px;
}

.content-section {
    background-color: var(--bg-color);
    border: 3px solid var(--link-hover-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: center;
}

/* --- Series Detail Page Layout --- */
.series-detail-layout {
    display: flex;
    gap: 30px;
}

.series-nav {
    flex: 0 0 200px; /* Reduced width */
    background-color: var(--link-hover-color);
    color: var(--main-color); /* Added for better text contrast */
    padding: 15px;
    border-radius: 10px;
    height: fit-content;
    position: sticky;
    top: 20px;
}

.series-nav nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.series-nav nav a {
    color: var(--main-color); /* Ensure links are readable */
    text-decoration: none;
    display: block;
    padding: 8px;
    border-radius: 5px;
    transition: background-color 0.2s;
}

.series-nav nav a:hover {
    background-color: rgba(0,0,0,0.1);
}


.series-content {
    flex-grow: 1;
}

/* --- General Content Blocks (e.g., text next to an image) --- */
.resource-content {
    display: flex;
    gap: 25px;
    align-items: flex-start;
    padding: 10px 20px;
}

.resource-text {
    flex: 3;
    line-height: 1.6;
}

.resource-images {
    flex: 2;
    text-align: center;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--main-color);
    color: #ccc;
    text-align: center;
    padding: 20px 0;
    margin-top: auto;
    font-size: 0.9em;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 992px) {
    /* --- Tablet Layout --- */
    .series-detail-layout {
        flex-direction: column;
    }
    .series-nav {
        position: static;
        width: 100%;
        box-sizing: border-box;
    }
}

@media (max-width: 850px) {
    /* --- Mobile Layout: General --- */
    .resource-content {
        flex-direction: column;
    }

    /* --- Mobile Layout: Navigation --- */
    .main-nav .desktop-menu { display: none; }
    .hamburger-menu { display: block; position: relative; }
    .main-nav ul {
        display: none;
        position: absolute;
        top: 50px;
        right: 0;
        background-color: var(--main-color);
        border: 2px solid var(--nav-bg-color);
        border-radius: 8px;
        flex-direction: column;
        width: 200px;
        padding: 10px;
        z-index: 100;
    }
    .main-nav ul li { width: 100%; text-align: center; }
    #menu-toggle:checked ~ ul { display: flex; }
    #menu-toggle:checked ~ .menu-btn span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    #menu-toggle:checked ~ .menu-btn span:nth-child(2) { opacity: 0; }
    #menu-toggle:checked ~ .menu-btn span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }
    .site-title-text { font-size: 1.5em; }
}

@media (max-width: 576px) {
    /* --- Small Mobile Layout --- */
    .site-title-text { display: none; }
}