:root {
    --lvn-bg-main: #ffffff;
    --lvn-bg-sidebar: #1a1a2e;
    --lvn-text-sidebar: #e2e8f0;
    --lvn-text-main: #1e293b;
    --lvn-text-muted: #64748b;
    --lvn-border: #e2e8f0;
    --lvn-primary: #4f46e5;
    --lvn-primary-hover: #4338ca;
    
    --c-hoang-dao: #fbbf24;
    --c-hac-dao: #475569;
    --c-le-tet: #ef4444;
}

.lvn-container {
    font-family: 'Inter', sans-serif;
    color: var(--lvn-text-main);
    background: var(--lvn-bg-main);
    border: 1px solid var(--lvn-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    max-width: 1200px;
    margin: 0 auto;
}

.lvn-layout { display: flex; min-height: 700px; }

/* Sidebar */
.lvn-sidebar {
    width: 250px; background: var(--lvn-bg-sidebar); color: var(--lvn-text-sidebar);
    display: flex; flex-direction: column; padding: 20px; flex-shrink: 0;
}
.lvn-logo-area { text-align: center; margin-bottom: 30px; }
.lvn-logo-area img { max-width: 80px; margin-bottom: 10px; }
.lvn-logo-area h2 { color: #fff; font-size: 1.2rem; margin: 0; font-weight: 600; }
.lvn-nav { display: flex; flex-direction: column; gap: 10px; flex: 1; }
.lvn-nav a {
    color: var(--lvn-text-sidebar); text-decoration: none; padding: 10px 15px;
    border-radius: 8px; transition: all 0.2s; display: flex; align-items: center; gap: 10px;
}
.lvn-nav a:hover, .lvn-nav a.active { background: rgba(255,255,255,0.1); color: #fff; }
.lvn-personalize-box { margin-top: auto; background: rgba(255,255,255,0.05); padding: 15px; border-radius: 8px; text-align: center; }

/* Buttons */
.lvn-btn-primary { background: var(--lvn-primary); color: #fff; border: none; padding: 10px 20px; border-radius: 6px; cursor: pointer; font-weight: 500; width: 100%; transition: 0.2s; }
.lvn-btn-primary:hover { background: var(--lvn-primary-hover); }
.lvn-btn-icon { background: transparent; border: none; color: var(--lvn-text-muted); cursor: pointer; padding: 8px; border-radius: 50%; }
.lvn-btn-icon:hover { background: #f1f5f9; color: var(--lvn-text-main); }

/* Main Content & Views */
.lvn-main-content { flex: 1; display: flex; flex-direction: column; position: relative; overflow: hidden; background: #f8fafc; }
.lvn-mobile-topbar { display: none; justify-content: space-between; align-items: center; padding: 15px 20px; border-bottom: 1px solid var(--lvn-border); background: #fff; }
.lvn-mobile-topbar h2 { margin: 0; font-size: 1.2rem; }

.lvn-views-container { flex: 1; position: relative; }
.lvn-view { display: none; width: 100%; height: 100%; position: absolute; top:0; left:0; overflow-y: auto; background:#fff; }
.lvn-view-active { display: block; }

/* View 1: Calendar */
.lvn-calendar-wrapper { display: flex; min-height: 100%; }
.lvn-day-details { width: 380px; border-right: 1px solid var(--lvn-border); padding: 30px; position: relative; background: #fff; overflow-y:auto; }
.lvn-calendar-grid-panel { flex: 1; padding: 30px; display: flex; flex-direction: column; background: #f8fafc; }

/* Day Details Inner */
.lvn-date-hero { text-align: center; }
.lvn-dh-solar { font-size: 1.1rem; font-weight: 500; }
.lvn-dh-big-date { font-size: 5rem; font-weight: 700; line-height: 1; color: var(--lvn-primary); margin: 10px 0; }
.lvn-dh-month-year { font-size: 1.1rem; color: var(--lvn-text-muted); }
.lvn-divider { height: 1px; background: var(--lvn-border); margin: 20px 0; }
.lvn-lunar-info { text-align: center; margin-bottom: 20px; }
.lvn-lunar-title { font-weight: 600; font-size: 1.2rem; }
.lvn-lunar-date { font-weight: 700; margin: 5px 0; }
.lvn-lunar-battu { font-size: 0.9rem; color: var(--lvn-text-muted); margin-bottom: 10px; }
.lvn-lunar-badge { display:inline-block; padding: 5px 15px; border-radius: 20px; font-weight: 600; font-size: 0.9rem; }
.badge-hoang { background: #fef3c7; color: #b45309; }
.badge-hac { background: #f1f5f9; color: #334155; }

.lvn-hd-box { display: flex; gap: 10px; margin-bottom: 20px; }
.lvn-hd-item { flex: 1; padding: 10px; border-radius: 8px; font-size: 0.85rem; }
.lvn-hd-item h4 { margin: 0 0 5px 0; font-size: 0.9rem; }
.lvn-hd-item p { margin: 0; line-height: 1.4; }
.hoang-dao { background: #fef3c7; color: #92400e; }
.hac-dao { background: #f1f5f9; color: #334155; }

.lvn-info-section p { margin: 8px 0; font-size: 0.9rem; }

.lvn-todo-box h4 { margin: 0 0 10px 0; font-size: 1rem; }
.lvn-todo-cols { display: flex; gap: 10px; font-size: 0.85rem; }
.lvn-todo-col { flex: 1; padding: 10px; border-radius: 8px; background: #f8fafc; }
.lvn-todo-col.nen { border-left: 4px solid #16a34a; }
.lvn-todo-col.khongnen { border-left: 4px solid #dc2626; }
.lvn-todo-col ul { margin: 0; padding-left: 20px; }
.lvn-todo-col li { margin-bottom: 5px; }

/* Grid Header */
.lvn-calendar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.lvn-month-selector { display: flex; gap: 10px; }
.lvn-select-month, .lvn-select-year { padding: 5px 10px; border: 1px solid var(--lvn-border); border-radius: 6px; background: #fff; }

.lvn-calendar-grid { flex: 1; display: flex; flex-direction: column; }
.lvn-weekdays { display: grid; grid-template-columns: repeat(7, 1fr); text-align: center; font-weight: 600; padding-bottom: 10px; border-bottom: 1px solid var(--lvn-border); }
.lvn-days { display: grid; grid-template-columns: repeat(7, 1fr); grid-auto-rows: minmax(70px, 1fr); gap: 5px; margin-top: 10px; }
.lvn-day-cell { border: 1px solid transparent; border-radius: 8px; padding: 10px; text-align: center; cursor: pointer; transition: 0.2s; position: relative; background:#fff;}
.lvn-day-cell:hover { border-color: var(--lvn-border); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.lvn-day-cell.active { background: var(--lvn-primary); color: #fff; box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3); }
.lvn-day-cell.active .lvn-lunar-day-text { color: rgba(255,255,255,0.8); }
.lvn-day-cell.other-month { opacity: 0.4; background:transparent;}
.lvn-solar-day { font-size: 1.2rem; font-weight: 600; }
.lvn-lunar-day-text { font-size: 0.75rem; color: var(--lvn-text-muted); margin-top: 2px; }
.lvn-day-dot { width: 6px; height: 6px; border-radius: 50%; position: absolute; bottom: 5px; left: 50%; transform: translateX(-50%); }

/* View: Bát Tự */
.lvn-battu-header { padding: 30px; text-align: center; border-bottom: 1px solid var(--lvn-border); }
.lvn-battu-header h2 { margin: 0 0 10px 0; font-size: 1.5rem; color: var(--lvn-primary); }
.lvn-battu-header p { margin: 0; font-size: 1.1rem; color: var(--lvn-text-muted); }

.lvn-hours-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; padding: 30px; background: #f8fafc; }
.lvn-hour-card { background: #fff; border: 1px solid var(--lvn-border); border-radius: 12px; padding: 20px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.lvn-hc-header { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 15px; }
.lvn-hc-header h4 { margin: 0; font-size: 1.2rem; flex: 1; }
.lvn-badge { padding: 4px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; }

.lvn-hc-nh-chart { display: flex; gap: 5px; align-items: flex-end; height: 80px; padding-top: 10px; border-top: 1px dashed var(--lvn-border); }
.nh-bar { width: 30px; border-radius: 4px 4px 0 0; min-height: 5px; position:relative;}
.nh-bar::after { content: attr(title); position:absolute; bottom: -20px; left:50%; transform:translateX(-50%); font-size:0.7rem; color:#666; white-space:nowrap;}

/* Loading */
.lvn-loading-overlay { position: absolute; inset: 0; background: rgba(255,255,255,0.8); display: flex; justify-content: center; align-items: center; z-index: 10; font-size: 2rem; color: var(--lvn-primary); display: none; }

/* Responsive */
@media (max-width: 900px) {
    .lvn-layout { flex-direction: column; }
    .lvn-sidebar { display: none; }
    .lvn-mobile-topbar { display: flex; }
    .lvn-calendar-wrapper { flex-direction: column; }
    .lvn-day-details { width: 100%; border-right: none; border-bottom: 1px solid var(--lvn-border); }
    .lvn-view { position: static; height: auto; }
}
/* Modal */
.lvn-modal { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: none; justify-content: center; align-items: center; z-index: 1000; padding: 20px; }
.lvn-modal.show { display: flex; }
.lvn-modal-content { background: #fff; width: 100%; max-width: 500px; border-radius: 12px; overflow: hidden; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); }
.lvn-modal-header { padding: 20px 25px; border-bottom: 1px solid var(--lvn-border); display: flex; justify-content: space-between; align-items: center; background: #f8fafc; }
.lvn-modal-header h3 { margin: 0; font-size: 1.25rem; font-weight: 600; color: var(--lvn-text-main); }
.lvn-close-modal { background: transparent; border: none; font-size: 1.25rem; cursor: pointer; color: var(--lvn-text-muted); transition: 0.2s; }
.lvn-close-modal:hover { color: var(--lvn-text-main); }
.lvn-modal-body { padding: 25px; }
.lvn-hint { font-size: 0.9rem; color: var(--lvn-text-muted); margin-top: 0; margin-bottom: 20px; line-height: 1.5; }
.lvn-form-group { margin-bottom: 15px; }
.lvn-form-row { display: flex; gap: 15px; }
.lvn-form-row .lvn-form-group { flex: 1; }
.lvn-form-group label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 0.9rem; color: var(--lvn-text-main); }
.lvn-form-group input[type="text"], .lvn-form-group select { width: 100%; padding: 10px 12px; border: 1px solid var(--lvn-border); border-radius: 6px; font-size: 0.95rem; font-family: inherit; color: var(--lvn-text-main); transition: border-color 0.2s; box-sizing: border-box; }
.lvn-form-group input[type="text"]:focus, .lvn-form-group select:focus { outline: none; border-color: var(--lvn-primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1); }
.lvn-radio-group { display: flex; gap: 20px; }
.lvn-radio-group label { display: flex; align-items: center; gap: 8px; font-weight: normal; cursor: pointer; }
.lvn-btn-block { width: 100%; padding: 12px; font-size: 1rem; border-radius: 8px; margin-top: 10px; }
.lvn-btn-outline { background: transparent; border: 1px solid var(--lvn-border); color: var(--lvn-text-main); cursor: pointer; transition: 0.2s; }
.lvn-btn-outline:hover { background: #f1f5f9; }

/* L?ch Nam */
.lvn-year-header { display: flex; align-items: center; justify-content: center; gap: 20px; padding: 20px; background: #f8fafc; border-bottom: 1px solid var(--lvn-border); }
.lvn-year-header h2 { margin: 0; font-size: 1.5rem; color: var(--lvn-text-main); }
.lvn-year-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; padding: 30px; }
.lvn-month-mini { background: #fff; border: 1px solid var(--lvn-border); border-radius: 8px; padding: 15px; }
.lvn-month-mini h4 { text-align: center; margin: 0 0 10px 0; color: var(--lvn-primary); }
.lvn-mini-weekdays { display: grid; grid-template-columns: repeat(7, 1fr); text-align: center; font-size: 0.75rem; font-weight: bold; color: var(--lvn-text-muted); margin-bottom: 5px; }
.lvn-mini-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; text-align: center; font-size: 0.85rem; }
.lvn-mini-day { padding: 4px; border-radius: 4px; }
.lvn-mini-day.today { background: var(--lvn-primary); color: #fff; font-weight: bold; }
.lvn-mini-day.other-month { opacity: 0.3; }

/* Ð?ng H? */
.lvn-clock-container { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 600px; padding: 40px; background: #f8fafc; }
.lvn-clock-title { font-size: 1.5rem; color: var(--lvn-text-muted); margin-bottom: 10px; }
.lvn-clock-time { font-size: 6rem; font-weight: 700; color: var(--lvn-primary); font-variant-numeric: tabular-nums; line-height: 1; margin-bottom: 10px; letter-spacing: -2px; }
.lvn-clock-date { font-size: 1.25rem; font-weight: 500; color: var(--lvn-text-main); margin-bottom: 20px; }
.lvn-clock-lunar { text-align: center; padding: 15px 30px; background: #fff; border: 1px solid var(--lvn-border); border-radius: 50px; font-size: 0.95rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); margin-bottom: 40px; }
.lvn-clock-lunar strong { color: var(--lvn-primary); font-size: 1.1rem; }
.lvn-energy-title { font-size: 1.5rem; margin-bottom: 20px; }
.lvn-energy-wrapper { display: flex; gap: 40px; background: #fff; padding: 30px; border-radius: 16px; box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); border: 1px solid var(--lvn-border); flex-wrap: wrap; justify-content: center; }
.lvn-energy-pillars { display: flex; flex-direction: column; justify-content: center; gap: 15px; }
.lvn-pillar { display: flex; align-items: center; gap: 15px; font-size: 1.1rem; }
.lvn-pillar-label { font-weight: 600; width: 60px; color: var(--lvn-text-muted); }
.lvn-pillar-value { font-weight: 700; color: var(--lvn-text-main); }
.lvn-energy-chart { display: flex; align-items: center; justify-content: center; }
.lvn-pie-chart { width: 150px; height: 150px; border-radius: 50%; background: #e2e8f0; position: relative; }
@media (max-width: 600px) {
    .lvn-day-cell { padding: 5px; min-height: 50px; }
    .lvn-solar-day { font-size: 1rem; }
    .lvn-lunar-day-text { font-size: 0.65rem; }
    .lvn-days { grid-auto-rows: minmax(50px, 1fr); gap: 2px; }
    .lvn-calendar-grid-panel { padding: 10px; }
    .lvn-day-details { padding: 15px; }
    .lvn-clock-time { font-size: 4rem; }
    .lvn-clock-container { padding: 20px; min-height: auto; }
    .lvn-energy-wrapper { gap: 20px; padding: 15px; flex-direction: column; }
    .lvn-energy-chart { margin-top: 20px; }
    .lvn-laso-table { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (max-width: 900px) {
    .lvn-sidebar { 
        display: none; 
        position: absolute; 
        top: 60px; /* height of topbar */
        left: 0; 
        width: 100%; 
        height: calc(100% - 60px); 
        z-index: 1000; 
        background: var(--lvn-bg-sidebar); 
    }
}
.lvn-luc-dieu-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
@media (max-width: 600px) {
    .lvn-luc-dieu-grid { grid-template-columns: repeat(2, 1fr); }
    .lvn-mat-troi-table-wrap { overflow-x: auto; white-space: nowrap; display: block; width: 100%; }
    .lvn-mat-troi-header { flex-direction: column; gap: 5px; }
}

/* Mobile Bottom Navigation */
.lvn-mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: #111827; /* Dark background */
    z-index: 9999;
    justify-content: space-around;
    padding: 10px 0 15px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.5);
}
.lvn-mobile-nav a {
    color: #fef08a; /* Gold text */
    text-decoration: none;
    font-size: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    font-weight: 600;
    transition: all 0.3s ease;
    opacity: 0.7;
}
.lvn-mobile-nav a i {
    font-size: 1.2rem;
    margin-bottom: 2px;
}
.lvn-mobile-nav a.active {
    color: #eab308; /* Brighter gold */
    transform: scale(1.1);
    opacity: 1;
}

@media (max-width: 768px) {
    .lvn-mobile-nav {
        display: flex;
    }
    .lvn-wrapper {
        padding-bottom: 75px; /* space for the nav */
    }
    .lvn-sidebar {
        display: none !important;
    }
    /* Hide the mobile nav wrapper from desktop */
    .lvn-sidebar-wrapper .lvn-mobile-nav {
        display: none;
    }
}