/* ===== Warm & Bookish Theme ===== */
:root {
    --color-navbar: #3e2723;
    --color-navbar-text: #faf3e0;
    --color-body: #faf3e0;
    --color-card-bg: #ffffff;
    --color-accent: #bf360c;
    --color-accent-hover: #a02b0a;
    --color-text: #3e2723;
    --color-text-muted: #6d4c41;
    --color-table-header: #4e342e;
    --color-border: #d7ccc8;
    --color-shadow: rgba(62, 39, 35, 0.12);
}

body {
    background-color: var(--color-body);
    color: var(--color-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

/* ===== Navbar ===== */
.navbar {
    background-color: var(--color-navbar) !important;
    box-shadow: 0 2px 8px var(--color-shadow);
}

.navbar-brand {
    color: var(--color-navbar-text) !important;
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.navbar .nav-link {
    color: var(--color-navbar-text) !important;
    opacity: 0.85;
    transition: opacity 0.2s;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    opacity: 1;
}

.navbar-toggler {
    border-color: rgba(250, 243, 224, 0.3);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(250,243,224,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Main Content ===== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* ===== Cards ===== */
.card {
    background-color: var(--color-card-bg);
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 12px var(--color-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--color-shadow);
}

.book-card .card-img-top {
    height: 280px;
    object-fit: contain;
    padding: 1rem;
    background: #f9f5f0;
    border-radius: 12px 12px 0 0;
}

.book-card .card-body {
    padding: 1rem 1.25rem;
}

.book-card .card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 3rem;
}

.book-card .card-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.book-card .price {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-accent);
}

/* ===== Buttons ===== */
.btn-accent {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
    border-radius: 8px;
    padding: 0.4rem 1.2rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.btn-accent:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: white;
}

.btn-outline-accent {
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: 8px;
    background: transparent;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-outline-accent:hover {
    background-color: var(--color-accent);
    color: white;
}

/* ===== Tables (Cart) ===== */
.table-bookish thead th {
    background-color: var(--color-table-header);
    color: white;
    font-weight: 600;
    border: none;
    padding: 0.75rem 1rem;
}

.table-bookish thead th:first-child {
    border-radius: 8px 0 0 0;
}

.table-bookish thead th:last-child {
    border-radius: 0 8px 0 0;
}

.table-bookish tbody tr {
    transition: background-color 0.15s;
}

.table-bookish tbody tr:hover {
    background-color: #f5ebe0;
}

.table-bookish td {
    vertical-align: middle;
    padding: 0.75rem 1rem;
    border-color: var(--color-border);
}

.cart-img {
    width: 50px;
    height: 70px;
    object-fit: contain;
}

/* ===== Login / Form Cards ===== */
.auth-card {
    max-width: 460px;
    margin: 2rem auto;
    border-radius: 12px;
}

.auth-card .card-header {
    background-color: var(--color-navbar);
    color: var(--color-navbar-text);
    border-radius: 12px 12px 0 0 !important;
    text-align: center;
    padding: 1.25rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.auth-card .card-body {
    padding: 2rem;
}

.form-control {
    border-radius: 8px;
    border: 1px solid var(--color-border);
    padding: 0.6rem 1rem;
}

.form-control:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(191, 54, 12, 0.15);
}

.form-label {
    font-weight: 500;
    color: var(--color-text);
}

/* ===== Description Card ===== */
.description-card {
    max-width: 700px;
    margin: 1.5rem auto;
    border-radius: 12px;
}

.description-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ===== Welcome Header ===== */
.welcome-header {
    color: var(--color-text);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

/* ===== Pagination ===== */
.pagination .page-link {
    color: var(--color-accent);
    border-color: var(--color-border);
    border-radius: 8px;
    margin: 0 2px;
}

.pagination .page-item.active .page-link {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.pagination .page-link:hover {
    background-color: #f5ebe0;
    color: var(--color-accent-hover);
}

/* ===== Total Due ===== */
.total-due {
    font-size: 1.4rem;
    color: var(--color-accent);
    font-weight: 700;
}

/* ===== Alert for credential hint ===== */
.credential-hint {
    background-color: #fff8e1;
    border: 1px solid #ffe082;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: #6d4c41;
    text-align: center;
}

/* ===== Empty state ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--color-text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem 0.5rem;
    }

    .book-card .card-img-top {
        height: 200px;
    }
}