:root {
    /* Colors */
    --black: #0f1115;
    --black-light: #1c1f26;
    --black-lighter: #2a2f3a;
    --gold: #d4af37;
    --gold-light: #f5d76e;
    --gold-dark: #aa8c2c;
    --white: #ffffff;
    --gray-light: #f4f5f7;
    --gray: #9ba3af;
    --gray-dark: #4b5563;
    
    /* Status Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 70px;
    --bottom-nav-height: 65px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--gray-light);
    color: var(--black);
    font-size: 15px;
    line-height: 1.5;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--black);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Utilities */
.gold { color: var(--gold); }
.text-gray { color: var(--gray-dark); }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }
.hidden { display: none !important; }

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge.success { background: var(--success-bg); color: var(--success); }
.badge.warning { background: var(--warning-bg); color: var(--warning); }
.badge.danger { background: var(--danger-bg); color: var(--danger); }
.badge.info { background: var(--info-bg); color: var(--info); }
.badge.gold { background: rgba(212, 175, 55, 0.1); color: var(--gold-dark); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-size: 0.95rem;
}
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.btn-primary {
    background-color: var(--black);
    color: var(--gold);
    box-shadow: var(--shadow);
}
.btn-primary:hover {
    background-color: var(--black-light);
    transform: translateY(-1px);
}
.btn-secondary {
    background-color: var(--white);
    color: var(--black);
    border: 1px solid #e5e7eb;
}
.btn-secondary:hover {
    background-color: #f9fafb;
}
.btn-gold {
    background-color: var(--gold);
    color: var(--black);
    font-weight: 600;
}
.btn-gold:hover {
    background-color: var(--gold-light);
}
.btn-danger {
    background-color: var(--danger);
    color: var(--white);
}
.btn-block {
    width: 100%;
}
.icon-btn {
    background: transparent;
    border: none;
    color: var(--gray-dark);
    font-size: 1.1rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
}
.icon-btn:hover {
    background-color: rgba(0,0,0,0.05);
    color: var(--black);
}
.icon-btn .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--danger);
    color: var(--white);
    font-size: 0.6rem;
    padding: 2px 5px;
}

/* Forms */
.input-group {
    margin-bottom: 1.2rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--black-light);
}
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    background-color: var(--white);
    color: var(--black);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

/* Login Screen */
#login-screen {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, var(--black) 0%, var(--black-light) 100%);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
#login-screen.active {
    display: flex;
}
.login-container {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.logo-large {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.logo-large i { color: var(--gold); }
.login-container h2 { margin-bottom: 0.5rem; }
.login-container .subtitle { color: var(--gray-dark); margin-bottom: 2rem; font-size: 0.9rem; }
.login-container form { text-align: left; }

/* App Layout */
#app-container {
    display: none;
    min-height: 100vh;
}
#app-container.active {
    display: flex;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    background-color: var(--black);
    color: var(--white);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}
.sidebar-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--black-light);
}
.sidebar-header .logo {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
#main-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}
#main-nav::-webkit-scrollbar { width: 4px; }
#main-nav::-webkit-scrollbar-thumb { background: var(--black-lighter); border-radius: 4px; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1.5rem;
    color: var(--gray);
    transition: var(--transition);
    border-left: 3px solid transparent;
}
.nav-item:hover {
    color: var(--white);
    background-color: var(--black-light);
}
.nav-item.active {
    color: var(--gold);
    background-color: var(--black-light);
    border-left-color: var(--gold);
}
.nav-item i { width: 20px; text-align: center; }

.user-info {
    padding: 1.2rem 1.5rem;
    border-top: 1px solid var(--black-light);
    display: flex;
    align-items: center;
    gap: 1rem;
}
.avatar {
    width: 40px; height: 40px;
    background-color: var(--gold);
    color: var(--black);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
}
.user-info .details { flex: 1; }
.user-info .name { font-weight: 600; font-size: 0.9rem; }
.user-info .role { font-size: 0.75rem; color: var(--gray); }
#logout-btn { color: var(--gray); }
#logout-btn:hover { color: var(--white); }

/* Main Content */
#main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
#topbar {
    height: var(--topbar-height);
    background-color: var(--white);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}
.topbar-left { display: flex; align-items: center; gap: 1rem; }
.page-title { font-size: 1.25rem; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}
.search-bar i {
    position: absolute;
    left: 1rem;
    color: var(--gray);
}
.search-bar input {
    padding-left: 2.5rem;
    border-radius: 9999px;
    background-color: #f3f4f6;
    border: none;
    width: 250px;
}
.search-bar input:focus {
    background-color: var(--white);
    box-shadow: 0 0 0 2px var(--gold);
}

#content-area {
    padding: 2rem;
    flex: 1;
}

/* Cards & Dashboard */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    transition: var(--transition);
    border-top: 3px solid transparent;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-card.gold-top { border-top-color: var(--gold); }
.stat-card.black-top { border-top-color: var(--black); }

.stat-info p { color: var(--gray-dark); font-size: 0.9rem; margin-bottom: 0.5rem; font-weight: 500; }
.stat-info h3 { font-size: 1.8rem; }
.stat-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem;
}
.stat-icon.gold-bg { background: rgba(212, 175, 55, 0.1); color: var(--gold-dark); }
.stat-icon.black-bg { background: var(--black); color: var(--gold); }
.stat-icon.success-bg { background: var(--success-bg); color: var(--success); }

/* Panels */
.panel {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}
.panel-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.panel-header h3 { font-size: 1.1rem; }
.panel-body { padding: 1.5rem; }

/* Tables */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th {
    padding: 1rem 1.5rem;
    background-color: #f9fafb;
    color: var(--gray-dark);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid #e5e7eb;
}
td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    vertical-align: middle;
}
tbody tr:hover { background-color: #f9fafb; }
.table-actions { display: flex; gap: 0.5rem; }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.modal-overlay.active { display: flex; opacity: 1; }
.modal {
    background: var(--white);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex; justify-content: space-between; align-items: center;
}
.modal-body { padding: 1.5rem; overflow-y: auto; }
.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid #e5e7eb;
    display: flex; justify-content: flex-end; gap: 1rem;
    background: #f9fafb;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

/* Mobile Layout */
.mobile-only { display: none; }
.desktop-only { display: flex; }

@media (max-width: 768px) {
    .mobile-only { display: flex; }
    .desktop-only { display: none !important; }
    
    #sidebar {
        transform: translateX(-100%);
    }
    #sidebar.open {
        transform: translateX(0);
        box-shadow: 10px 0 15px rgba(0,0,0,0.1);
    }
    
    #main-content {
        margin-left: 0;
        padding-bottom: var(--bottom-nav-height);
    }
    
    #topbar { padding: 0 1rem; }
    #content-area { padding: 1rem; }
    
    .grid-cards { grid-template-columns: 1fr; }
    
    #bottom-nav {
        position: fixed;
        bottom: 0; left: 0; width: 100%;
        height: var(--bottom-nav-height);
        background: var(--white);
        box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
        display: flex;
        justify-content: space-around;
        align-items: center;
        z-index: 90;
        border-top: 1px solid #e5e7eb;
    }
    .bottom-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        color: var(--gray);
        font-size: 0.7rem;
        width: 100%;
        height: 100%;
    }
    .bottom-nav-item i { font-size: 1.2rem; }
    .bottom-nav-item.active { color: var(--gold-dark); font-weight: 600; }
}

@media (min-width: 769px) { #sidebar.collapsed { width: 0; padding: 0; overflow: hidden; } #sidebar.collapsed + #main-content { margin-left: 0; } }