:root {
    --gold: #D4AF37;
    --dark-gold: #B8941E;
    --black: #0A0A0A;
    --light-black: #1A1A1A;
    --gray: #2A2A2A;
    --light-gray: #444444;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--black);
    color: var(--white);
    line-height: 1.6;
    background-image: radial-gradient(circle at 20% 10%, rgba(212,175,55,0.08), transparent 30%), radial-gradient(circle at 80% 80%, rgba(212,175,55,0.05), transparent 35%);
}

.brand-logo {
    width: 44px;
    height: 44px;
    object-fit: cover;
    border-radius: 50%;
    border: 1px solid var(--gold);
}

/* Header & Navigation */
.navbar {
    background-color: var(--light-black) !important;
    border-bottom: 2px solid var(--gold);
    padding: 1rem 0;
}

.navbar-brand {
    color: var(--gold) !important;
    font-size: 1.8rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.navbar-nav .nav-link {
    color: var(--white) !important;
    margin: 0 1rem;
    transition: color 0.3s;
}

.navbar-nav .nav-link:hover {
    color: var(--gold) !important;
}

.btn-gold {
    background-color: var(--gold);
    color: var(--black);
    border: none;
    padding: 0.5rem 1.5rem;
    font-weight: bold;
    transition: all 0.3s;
}

.btn-gold:hover {
    background-color: var(--dark-gold);
    color: var(--black);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
}

/* Hero Slider */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--black) 0%, var(--light-black) 100%);
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-content {
    text-align: center;
    padding: 2rem;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--gold);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-dark {
    background-color: var(--black);
}

.section-light {
    background-color: var(--light-black);
}

.section-title {
    text-align: center;
    color: var(--gold);
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Cards */
.card {
    background-color: var(--gray);
    border: 1px solid var(--gold);
    border-radius: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.3);
}

.card-title {
    color: var(--gold);
    font-weight: bold;
}

.card-text {
    color: var(--white);
}

/* Forms */
.form-control {
    background-color: var(--gray);
    border: 1px solid var(--light-gray);
    color: var(--white);
    padding: 0.75rem;
}

.form-control:focus {
    background-color: var(--gray);
    border-color: var(--gold);
    color: var(--white);
    box-shadow: 0 0 0 0.2rem rgba(212, 175, 55, 0.25);
}

.form-label {
    color: var(--gold);
    font-weight: bold;
    margin-bottom: 0.5rem;
}

/* Dashboard */
.dashboard-card {
    background: linear-gradient(135deg, var(--light-black) 0%, var(--gray) 100%);
    border: 2px solid var(--gold);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.stat-box {
    text-align: center;
    padding: 2rem;
    background-color: var(--light-black);
    border: 1px solid var(--gold);
    border-radius: 10px;
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    color: var(--gold);
    font-weight: bold;
}

.stat-label {
    font-size: 1rem;
    color: var(--white);
    text-transform: uppercase;
}

/* Tree Visualization */
.tree {
    padding: 1rem;
}

.tree ul {
    padding-left: 2rem;
    list-style: none;
    position: relative;
}

.tree li {
    padding: 0.5rem 0;
    position: relative;
}

.tree li::before {
    content: '';
    position: absolute;
    top: 0;
    left: -1rem;
    border-left: 1px solid var(--gold);
    height: 100%;
}

.tree li::after {
    content: '';
    position: absolute;
    top: 1.5rem;
    left: -1rem;
    border-top: 1px solid var(--gold);
    width: 1rem;
}

.tree-node {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--gray);
    border: 1px solid var(--gold);
    border-radius: 5px;
    color: var(--white);
}

/* Footer */
footer {
    background-color: var(--light-black);
    border-top: 2px solid var(--gold);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-text {
    color: var(--white);
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

/* Alerts */
.alert-success {
    background-color: var(--light-black);
    border: 1px solid var(--gold);
    color: var(--gold);
}

.alert-danger {
    background-color: var(--light-black);
    border: 1px solid #dc3545;
    color: #dc3545;
}

/* Table */
.table {
    color: var(--white);
}

.table-dark {
    background-color: var(--gray);
}

.table-dark th {
    color: var(--gold);
    border-color: var(--gold);
}

.table-dark td {
    border-color: var(--light-gray);
}

.table-hover tbody tr:hover {
    background-color: var(--light-black);
}