/* --- VARIABEL & RESET --- */
:root {
    --bg-color: #0f172a; /* Slate 900 */
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --primary-color: #3b82f6; /* Blue 500 */
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-family: 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    /* Efek background abstract */
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
}

.hidden {
    display: none !important;
}

/* --- GLASSMORPHISM UTILITIES --- */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

/* --- LOGIN SCREEN --- */
.screen-container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.brand-logo {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-card h1 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

/* --- DASHBOARD LAYOUT (PC & TABLET) --- */
.dashboard-layout {
    display: flex;
    height: 100vh;
    padding: 16px;
    gap: 16px;
}

/* Sidebar */
.sidebar {
    width: 260px;
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 40px;
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-links li {
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-links li:hover, .nav-links li.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-links li.active {
    border-left: 3px solid var(--primary-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info span {
    font-size: 0.9rem;
    font-weight: 600;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    text-align: left;
    font-size: 0.8rem;
    cursor: pointer;
    margin-top: 4px;
}
.btn-text:hover { color: #ef4444; }

/* Main Content */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow: hidden;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.search-bar {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
    padding: 10px 16px;
    border-radius: 8px;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--glass-border);
}

.search-bar i {
    color: var(--text-muted);
    margin-right: 10px;
}

.search-bar input {
    background: none;
    border: none;
    color: var(--text-main);
    outline: none;
    width: 100%;
}

.content-area {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px;
}

.content-area h3 {
    margin-bottom: 20px;
    font-weight: 600;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    color: var(--text-muted);
    text-align: center;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    .dashboard-layout {
        flex-direction: column;
        padding: 0;
        gap: 0;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        padding: 16px;
        border-radius: 0;
        border-bottom: 1px solid var(--glass-border);
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .nav-links {
        display: none; /* Sembunyikan menu di mobile untuk sementara, bisa dibuat hamburger menu nanti */
    }

    .user-profile {
        margin-top: 0;
        padding-top: 0;
        border-top: none;
    }

    .main-content {
        padding: 16px;
    }
    
    .topbar {
        flex-direction: column-reverse;
        gap: 16px;
        border-radius: 12px;
    }
    
    .search-bar {
        max-width: 100%;
    }
}