:root {
    --primary-color: #F36F24;
    --sidebar-tip-bg: #FFF9E6;
    --text-dark-slate: #2d3748;
    --text-light-grey: #a0aec0;
    --background-color: #F7FAFC;
    --white-color: #FFFFFF;
    --border-color: #E2E8F0;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --sidebar-width: 280px;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-dark-slate);
    display: flex;
    flex-wrap: wrap;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--white-color);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding-bottom: 24px;
    display: flex;
    align-items: center;
}

.sidebar-header .icon {
    font-size: 2.5rem;
    margin-right: 12px;
}

.sidebar-header .title {
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
}

.sidebar-header .subtitle {
    font-size: 0.875rem;
    color: var(--text-light-grey);
}

.sidebar-nav {
    flex-grow: 1;
    list-style: none;
    overflow-y: auto;
}

.nav-item a {
    display: flex;
    align-items: center;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 8px;
    transition: all 0.2s ease-in-out;
    cursor: pointer;
}

.nav-item .icon {
    margin-right: 12px;
}

.nav-item.inactive a {
    color: var(--text-dark-slate);
    background-color: var(--white-color);
}

.nav-item.inactive a:hover {
    background-color: var(--background-color);
}

.nav-item.active > a {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.nav-sub-item a {
    padding-left: 48px; /* Indent */
    font-weight: 400;
    color: var(--text-dark-slate);
    font-size: 0.9rem;
}
.nav-sub-item a:hover {
    color: var(--primary-color);
}

.nav-sub-item.active a {
    color: var(--primary-color);
    font-weight: 700;
}

.sidebar-footer {
    margin-top: auto;
}

.tip-box {
    background-color: var(--sidebar-tip-bg);
    border: 1px solid #F6E05E; /* Gold border */
    border-radius: 8px;
    padding: 16px;
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-dark-slate);
}

.tip-box .icon {
    margin-right: 12px;
    font-size: 1.5rem;
}

.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    padding: 60px 80px;
    display: none; /* Hidden by default, shown by JS */
}

.main-content.active {
    display: block;
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-header .tag {
    display: inline-block;
    background-color: var(--border-color);
    color: var(--text-light-grey);
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.page-header .title {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-header .subtitle {
    font-size: 1.125rem;
    color: var(--text-light-grey);
}

.feature-card {
    background-color: var(--white-color);
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px var(--shadow-color), 0 4px 6px -2px var(--shadow-color);
    display: flex;
    overflow: hidden;
    margin-bottom: 40px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -5px rgba(0,0,0,0.1), 0 8px 10px -4px rgba(0,0,0,0.08);
}

.card-visual {
    flex-basis: 50%;
    position: relative;
    min-height: 350px;
    background-color: #f7fafc; /* Add background for letterboxing */
}

.card-visual img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain; /* Changed from 'cover' */
    padding: 1rem; /* Added padding */
}

.card-visual .gradient-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    text-align: left;
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--white-color);
}

.card-content {
    flex-basis: 50%;
    padding: 40px;
    display: flex;
    flex-direction: column;
}

.card-content .eyebrow {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.card-content .title {
    font-family: 'Playfair Display', serif;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.card-content .body-text {
    line-height: 1.6;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    font-size: 0.875rem;
    color: var(--text-light-grey);
}

/* Detail View */
.detail-view {
    padding: 40px;
    background: var(--white-color);
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px var(--shadow-color);
}

.detail-view-header {
    margin-bottom: 30px;
}

.detail-view .back-button {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-light-grey);
    margin-bottom: 20px;
    font-weight: 500;
}

.detail-view .back-button:hover {
    color: var(--primary-color);
}

.detail-view .back-button .icon {
    margin-right: 8px;
}

.detail-view .detail-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
}

.detail-view .detail-image {
    width: 100%;
    height: auto; /* Let height adjust to maintain aspect ratio */
    max-height: 50vh; /* Prevent overly tall images */
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 30px;
    background-color: #f7fafc;
}

.detail-view .detail-content {
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.detail-view-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.detail-view-nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}
.detail-view-nav a:hover {
    background-color: var(--background-color);
}

.detail-view-nav a.disabled {
    color: var(--text-light-grey);
    pointer-events: none;
    border-color: var(--border-color);
}


/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        padding: 40px;
    }
    .feature-card {
        flex-direction: column;
    }
}


@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 40px 24px;
    }
}