/* Library Theme Styles */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;700&family=Lato:ital,wght@0,400;0,700;1,400&family=Playfair+Display:ital,wght@0,400;0,700;1,400&display=swap');

:root {
    /* Palette inspired by old libraries */
    --lib-wood-dark: #3e2723;
    --lib-wood-light: #5d4037;
    --lib-paper: #fdfbf7;
    --lib-paper-dark: #f0e6d2;
    --lib-gold: #c5a059;
    --lib-gold-hover: #e6c67c;
    --lib-ink: #2c241b;
    --lib-green: #1b3a2b; /* Classic library lamp green */
    --lib-red: #58181f; /* Leather book binding red */
    
    --font-heading: 'Cinzel', serif;
    --font-serif: 'Playfair Display', serif;
    --font-body: 'Lato', sans-serif;
}

body {
    background-color: var(--lib-paper);
    color: var(--lib-ink);
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--lib-wood-dark);
    font-weight: 700;
}

/* Sidebar Styling */
.lib-sidebar {
    width: 280px;
    background-color: var(--lib-wood-dark);
    background-image: linear-gradient(90deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0) 5%, rgba(0,0,0,0) 95%, rgba(0,0,0,0.2) 100%);
    color: var(--lib-paper);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding: 2rem 1.5rem;
    box-shadow: 5px 0 15px rgba(0,0,0,0.3);
    z-index: 1000;
    border-right: 4px solid var(--lib-wood-light);
    display: flex;
    flex-direction: column;
}

.lib-brand {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--lib-gold);
    text-decoration: none;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(197, 160, 89, 0.3);
    margin-bottom: 2rem;
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.lib-brand:hover {
    color: var(--lib-gold-hover);
}

.lib-nav-item {
    display: block;
    padding: 12px 15px;
    margin-bottom: 0.5rem;
    color: #e0d0b8; /* Muted gold */
    text-decoration: none;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.lib-nav-item:hover, .lib-nav-item.active {
    background-color: rgba(197, 160, 89, 0.1);
    color: var(--lib-gold);
    border-left: 3px solid var(--lib-gold);
    padding-left: 20px;
}

/* Main Content Area */
.lib-content {
    margin-left: 280px; /* Width of sidebar */
    width: calc(100% - 280px);
    padding: 3rem;
    background-color: var(--lib-paper);
    background-image: 
        linear-gradient(var(--lib-paper) 2px, transparent 2px),
        linear-gradient(90deg, var(--lib-paper) 2px, transparent 2px);
    background-size: 40px 40px; /* Subtle grid like old paper */
    min-height: 100vh;
}

/* Cards / Containers as 'Books' or 'Ledgers' */
.lib-card {
    background-color: #fff;
    border: 1px solid #dcd6cb;
    border-radius: 2px;
    box-shadow: 0 4px 6px rgba(62, 39, 35, 0.1);
    padding: 2rem;
    position: relative;
    margin-bottom: 2rem;
}

.lib-card::before {
    /* Corner flourish or simple line */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--lib-wood-light);
}

/* Buttons */
.btn-lib-primary {
    background-color: var(--lib-green);
    color: #fff;
    border: 1px solid var(--lib-green);
    font-family: var(--font-heading);
    letter-spacing: 1px;
    padding: 0.5rem 1.5rem;
    border-radius: 2px;
    transition: all 0.2s;
}

.btn-lib-primary:hover {
    background-color: #142b20;
    border-color: #142b20;
    color: var(--lib-gold);
}

/* Tables as Ledgers */
.table-lib {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-serif);
}

.table-lib th {
    font-family: var(--font-heading);
    background-color: var(--lib-paper-dark);
    color: var(--lib-wood-dark);
    border-bottom: 2px solid var(--lib-wood-dark);
    padding: 12px;
    text-align: left;
}

.table-lib td {
    padding: 12px;
    border-bottom: 1px solid #e0e0e0;
    color: var(--lib-ink);
}

.table-lib tr:hover {
    background-color: rgba(197, 160, 89, 0.05);
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .lib-sidebar {
        width: 100%;
        height: auto;
        position: relative;
        flex-direction: row;
        border-right: none;
        border-bottom: 4px solid var(--lib-wood-light);
        padding: 1rem;
        align-items: center;
        justify-content: space-between;
    }
    
    .lib-brand {
        margin-bottom: 0;
        border-bottom: none;
        padding-bottom: 0;
        font-size: 1.5rem;
    }

    .lib-nav-group {
        display: flex;
    }

    .lib-nav-item {
        margin-bottom: 0;
        margin-left: 10px;
    }

    .lib-content {
        margin-left: 0;
        width: 100%;
        padding: 1.5rem;
    }
}