:root {
    --primary: #4F46E5;
    --primary-light: #6366f1;
    --secondary: #10B981;
    --bg-dark: #f1f5f9; /* Slate 100 for more solid premium feel */
    --bg-panel: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: rgba(0, 0, 0, 0.04);
    --glass-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-dark);
    background-image: radial-gradient(circle at 15% 50%, rgba(79, 70, 229, 0.15), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.15), transparent 25%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    background: linear-gradient(to right, #818CF8, #10B981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.5px;
}

.controls {
    display: flex;
    gap: 1.5rem;
    background: var(--bg-panel);
    padding: 1.5rem;
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--glass-shadow);
    flex-wrap: wrap;
    position: relative;
    z-index: 50;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
    min-width: 180px;
}

label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.glass-input {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.05);
    color: var(--text-main);
    padding: 0.85rem 1.25rem;
    border-radius: 0.75rem;
    outline: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    width: 100%;
}

.glass-input:focus {
    background: #ffffff;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

select.glass-input option {
    background-color: #ffffff;
    color: var(--text-main);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    border: none;
    padding: 0.85rem 1.75rem;
    border-radius: 2rem;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    box-shadow: 0 4px 15px -3px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(79, 70, 229, 0.5);
}

.btn-sm {
    background: #f1f5f9;
    color: #475569;
    border: 1px solid transparent;
    padding: 0.5rem 1rem;
    border-radius: 1.5rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn-sm:hover {
    background: #ffffff;
    border-color: #cbd5e1;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    color: #1e293b;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.glass-card {
    background: var(--bg-panel);
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    padding: 2rem;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

/* KPI Cards */
.kpi-wrapper {
    grid-column: span 12;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.kpi-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.kpi-icon.patients { background: rgba(79, 70, 229, 0.2); color: #818CF8; }
.kpi-icon.visits { background: rgba(16, 185, 129, 0.2); color: #34D399; }
.kpi-icon.appointments { background: rgba(245, 158, 11, 0.2); color: #FBBF24; }

.kpi-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.kpi-info .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.col-span-12 { grid-column: span 12; }
.col-span-8 { grid-column: span 8; }
.col-span-6 { grid-column: span 6; }
.col-span-4 { grid-column: span 4; }
.col-span-3 { grid-column: span 3; }

@media (max-width: 1024px) {
    .col-span-8, .col-span-4 { grid-column: span 12; }
    .col-span-3 { grid-column: span 6; }
}

@media (max-width: 768px) {
    body { padding: 1rem; }
    header { 
        flex-direction: column; 
        text-align: center; 
        gap: 1rem; 
        align-items: center;
    }
    header > div {
        justify-content: center !important;
    }
    .controls { 
        flex-direction: column; 
        gap: 1rem; 
    }
    .glass-input { width: 100%; min-width: unset; }
    .btn-primary { width: 100%; justify-content: center; }
    .col-span-12, .col-span-8, .col-span-6, .col-span-4, .col-span-3 { 
        grid-column: span 12 !important; 
    }
    .kpi-card { 
        flex-direction: column; 
        text-align: center; 
        padding: 1.5rem;
    }
    .kpi-info h3 { margin-top: 0.5rem; }
    .glass-card { padding: 1.25rem; }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title i {
    color: var(--primary-light);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: #f8fafc;
}

th:first-child { border-top-left-radius: 0.5rem; }
th:last-child { border-top-right-radius: 0.5rem; }

tbody tr {
    transition: background-color 0.2s ease;
}

tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Loader */
#loader {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(79, 70, 229, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-light);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: rgba(0,0,0,0.05); }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.3); }