@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;500;700&display=swap');

:root {
    /* Color Palette */
    --bg-dark: #2b2624;       /* Deep Charcoal Wood */
    --bg-paper: #f4f1ea;      /* Rice Paper */
    --text-dark: #3e3634;     /* Ink Black */
    --text-light: #e8e6e1;    /* Off-white */
    --accent-gold: #c5a059;   /* Muted Gold */
    --accent-gold-hover: #dcc07b;
    --border-color: #dcd6cb;
    
    /* Spacing & Transition */
    --transition-speed: 0.3s;
}

body {
    background-color: var(--bg-dark);
    font-family: 'Noto Serif SC', serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2336302e' fill-opacity='0.4'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* Navbar */
.navbar {
    background-color: rgba(43, 38, 36, 0.95) !important;
    border-bottom: 1px solid var(--accent-gold);
    backdrop-filter: blur(5px);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-gold) !important;
}

/* Tabs */
.nav-tabs {
    border-bottom: 1px solid var(--accent-gold);
    margin-bottom: 2rem;
    justify-content: center;
}

.nav-tabs .nav-link {
    color: var(--text-light);
    border: none;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-speed) ease;
    font-weight: 500;
    padding: 10px 20px;
    opacity: 0.7;
}

.nav-tabs .nav-link:hover {
    color: var(--accent-gold);
    border-color: transparent;
    opacity: 1;
}

.nav-tabs .nav-link.active {
    background-color: transparent;
    color: var(--accent-gold);
    border-bottom: 3px solid var(--accent-gold);
    opacity: 1;
}

/* Cards (The "Menu" Paper Look) */
.card {
    background-color: var(--bg-paper);
    border: none;
    border-radius: 2px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

/* Subtle texture for cards */
.card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.5;
}

.card h4, .card h5 {
    color: var(--bg-dark);
    border-bottom: 1px solid var(--accent-gold);
    padding-bottom: 10px;
    margin-bottom: 20px;
    display: inline-block;
    font-weight: 700;
}

/* Form Controls */
.form-control, .form-select {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--text-dark);
    border-radius: 0;
    font-family: 'Noto Serif SC', serif;
    padding-left: 0;
}

.form-control:focus, .form-select:focus {
    background-color: transparent;
    box-shadow: none;
    border-bottom: 2px solid var(--accent-gold);
}

/* Buttons */
.btn-primary, .btn-success, .btn-info, .btn-warning {
    background-color: var(--bg-dark);
    border: 1px solid var(--accent-gold);
    color: var(--accent-gold);
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.btn-primary:hover, .btn-success:hover, .btn-info:hover, .btn-warning:hover {
    background-color: var(--accent-gold);
    color: var(--bg-dark);
    border-color: var(--accent-gold);
}

.btn-outline-primary, .btn-outline-danger, .btn-outline-success {
    border-radius: 2px;
}

/* Tables */
.table {
    color: var(--text-dark);
}

.table thead th {
    border-bottom: 2px solid var(--accent-gold);
    font-weight: 700;
    color: var(--bg-dark);
}

.table td, .table th {
    border-top: 1px solid rgba(0,0,0,0.1);
}

.table-hover tbody tr:hover {
    background-color: rgba(197, 160, 89, 0.1);
}

/* Badges */
.badge {
    font-weight: 500;
    border-radius: 2px;
}

.bg-secondary {
    background-color: #8c8c8c !important;
}

.bg-info {
    background-color: rgba(197, 160, 89, 0.2) !important;
    color: var(--bg-dark) !important;
    border: 1px solid var(--accent-gold);
}

/* Modal */
.modal-content {
    background-color: var(--bg-paper);
    border-radius: 2px;
    border: 1px solid var(--accent-gold);
}

.modal-header {
    border-bottom: 1px solid var(--accent-gold);
}

.modal-footer {
    border-top: none;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-pane {
    animation: fadeIn 0.4s ease-out;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-gold);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gold-hover);
}

/* Specific elements adjustments */
#aiResult {
    font-family: 'Noto Serif SC', serif;
    line-height: 1.8;
    background: rgba(255, 255, 255, 0.5);
    padding: 15px;
    border-left: 3px solid var(--accent-gold);
}

.card-text.small.text-muted {
    font-style: italic;
    opacity: 0.8;
}

/* Mobile Optimization */
@media (max-width: 768px) {
    .nav-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 5px;
    }
    .nav-tabs .nav-link {
        white-space: nowrap;
        font-size: 0.9rem;
    }
}