/* css/core.css */
/* PONDASI UTAMA & LAYOUT */

:root {
    --bg-dark: #050505;
    --glass: rgba(20, 20, 20, 0.6);
    --neon-blue: #00f3ff;
    --neon-purple: #bc13fe;
    --gold: #ffd700;
    --danger: #ff003c;
    --text-main: #e0e0e0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    padding-bottom: 80px; /* Space untuk Navigasi Bawah */
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(0, 243, 255, 0.05) 0%, transparent 50%);
}

/* HEADER */
.app-header {
    text-align: center;
    padding: 20px 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(5px);
}

.app-title {
    font-family: 'Orbitron', sans-serif;
    margin: 0;
    letter-spacing: 2px;
    background: linear-gradient(to right, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

/* NAVIGASI BAWAH */
.bottom-nav {
    position: fixed;
    bottom: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    border-top: 1px solid #333;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #666;
    font-size: 0.7em;
    cursor: pointer;
    transition: 0.3s;
}

.nav-item.active {
    color: var(--neon-blue);
    transform: translateY(-5px);
}

.nav-icon {
    font-size: 1.5em;
    margin-bottom: 3px;
}

/* PAGE CONTAINER */
.page-container {
    display: none;
    padding: 15px;
    animation: fadeIn 0.5s ease;
}
.page-container.active {
    display: block;
}

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