:root {
    --bg-dark: #0b0d13;
    --bg-card: rgba(23, 27, 38, 0.7);
    --bg-sidebar: #12151e;
    --text-main: #f1f5f9;
    --text-muted: #64748b;
    --accent: #ff4757;
    --accent-glow: rgba(255, 71, 87, 0.3);
    --blue: #3742fa;
    --green: #2ed573;
    --border: rgba(255, 255, 255, 0.05);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    background-image: radial-gradient(circle at 50% 50%, #1e222d 0%, #0b0d13 100%);
}

.app-container { display: flex; height: 100vh; }

/* Sidebar */
.sidebar {
    width: 240px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 30px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 0 25px 40px;
    font-size: 18px;
    font-weight: 800;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-menu { padding: 0 15px; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: 12px;
    margin-bottom: 5px;
    font-size: 14px;
    font-weight: 500;
    transition: 0.3s;
}
.nav-item:hover, .nav-item.active {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-main);
}
.nav-item.active {
    color: var(--accent);
    background: rgba(255, 71, 87, 0.05);
}

/* Main */
.main-content { flex: 1; overflow-y: auto; display: flex; flex-direction: column; }

.topbar {
    padding: 25px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    position: sticky; top: 0; z-index: 100;
}

.welcome-text h1 { font-size: 24px; font-weight: 700; }
.welcome-text p { color: var(--text-muted); font-size: 14px; margin-top: 5px; }

.header-actions { display: flex; gap: 15px; }

/* Dashboard Content */
.dashboard { padding: 40px; }

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
    gap: 30px;
}

.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 30px;
    backdrop-filter: blur(15px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
}
.card-header i { font-size: 20px; color: var(--accent); }
.card-header h3 { font-size: 16px; font-weight: 700; letter-spacing: 0.5px; }

.numbers-display {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}
.numbers-display .num {
    font-size: 42px;
    font-weight: 800;
    color: var(--accent);
    text-shadow: 0 0 20px var(--accent-glow);
}

.reason-text {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* De Section */
.de-card { grid-column: 1 / 3; }
.de-stats { display: flex; gap: 40px; margin-bottom: 30px; }
.stat-item span { font-size: 12px; color: var(--text-muted); margin-right: 10px; }
.stat-item strong { font-size: 18px; color: var(--green); }

.de-lists { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; margin-bottom: 25px; }
.list-group h4 { font-size: 12px; color: var(--text-muted); margin-bottom: 15px; text-transform: uppercase; }

.numbers-wrap { display: flex; flex-wrap: wrap; gap: 10px; }
.numbers-wrap span {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 15px;
    color: var(--text-main);
    border: 1px solid var(--border);
}
.de-dan10 span { color: #ff9f43; border-color: rgba(255, 159, 67, 0.3); }
.full-width { grid-column: 1 / 3; margin-top: 20px; }
#de-dan36 span { color: var(--green); border-color: rgba(46, 213, 115, 0.3); }

/* Ba Cang */
.numbers-wrap.compact span { font-size: 13px; padding: 6px 10px; }

/* Global components */
.btn {
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: 0.3s;
    border: none;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 20px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 25px var(--accent-glow); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-muted); }
.btn-outline:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }

.spinner {
    width: 50px; height: 50px;
    border: 3px solid rgba(255,255,255,0.05);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s infinite linear;
    margin-bottom: 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 100px 0; opacity: 0.6;
}
.empty-state i { font-size: 60px; margin-bottom: 25px; color: var(--text-muted); }

.hidden { display: none !important; }