@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root {
    --bg-gradient: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --accent: #00d2ff;
    --accent-secondary: #3a7bd5;
}

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

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: var(--accent);
}

.container {
    flex: 1;
    padding: 2rem 5%;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.dashboard-title {
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 600;
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.kpi-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.kpi-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.kpi-card:hover::before {
    opacity: 1;
}

.kpi-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.kpi-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 2.5rem;
    font-weight: 700;
}

.kpi-unit {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.charts-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.chart-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
}

.chart-header {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
}

@media (max-width: 992px) {
    .charts-section {
        grid-template-columns: 1fr;
    }
}