/* ------------------------- */
/* --- Global & Resets --- */
/* ------------------------- */
:root {
    /* Color Palette */
    --bg-light: #f0f2f5;           /* Light background grey */
    --card-bg: #ffffff;            /* White card background */
    --text-dark: #2c3e50;          /* Dark charcoal for primary text */
    --text-medium: #7f8c8d;        /* Medium grey for secondary text */
    --text-light: #ecf0f1;         /* Light grey for inverse text */
    --accent-blue: #3498db;        /* Professional blue accent */
    --accent-blue-light: #bee6fb;  /* Lighter blue for subtle highlights */
    --border-color: #e0e0e0;       /* Light border */
    --shadow-light: rgba(0, 0, 0, 0.08); /* Subtle shadow */

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* Ensures footer sticks to bottom */
}

/* Universal Container for Content Width */
.container {
    width: 90%;
    max-width: 1200px; /* Slightly wider max-width for more content space */
    margin: 0 auto;
}

/* ------------------------- */
/* --- Header & Footer --- */
/* ------------------------- */
.dashboard-header {
    background-color: var(--card-bg); /* Match card background for cohesive look */
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px var(--shadow-light);
    margin-bottom: 2rem; /* Space between header and main content */
}

.dashboard-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.dashboard-header .header-subtitle {
    font-size: 1.1rem;
    color: var(--text-medium);
}

.dashboard-footer {
    margin-top: auto; /* Pushes footer to the bottom */
    padding: 2rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-medium);
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg); /* Match header/card background */
}

.dashboard-footer a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
}

.dashboard-footer a:hover {
    text-decoration: underline;
}

/* ------------------------- */
/* --- Dashboard Layout --- */
/* ------------------------- */
.dashboard-main {
    flex-grow: 1; /* Allows main content to fill available space */
    padding-bottom: 2rem; /* Space before footer */
}

.dashboard-grid {
    display: grid;
    gap: 1.5rem; /* Gap between cards */
    grid-template-columns: 1fr 2fr; /* Metrics on left (1 part), Chart on right (2 parts) */
    grid-template-areas: "metrics chart"; /* Named areas for readability */
}

/* Card Styles */
.dashboard-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px var(--shadow-light);
    padding: 1.75rem; /* Consistent padding inside cards */
}

.dashboard-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* Status Messages (Loading/Error) */
.status-message {
    text-align: center;
    padding: 3rem 1.5rem;
    font-size: 1.1rem;
    color: var(--text-medium);
}

.status-message.error-message {
    color: #e74c3c; /* Red for errors */
}

.status-message small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9em;
    color: var(--text-medium);
}

/* Spinner for Loading State */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-blue);
    animation: spin 1s ease-in-out infinite;
    vertical-align: middle;
    margin-left: 8px;
}

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

/* ------------------------- */
/* --- Metrics Card (Left) --- */
/* ------------------------- */
.metrics-card {
    grid-area: metrics; /* Assign to the 'metrics' grid area */
}

.metrics-card .data-date {
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.metrics-table {
    width: 100%;
    border-collapse: collapse;
}

.metrics-table th, .metrics-table td {
    padding: 1.2rem 0; /* More padding for larger rows */
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.metrics-table tr:last-child th,
.metrics-table tr:last-child td {
    border-bottom: none; /* No border for the last row */
}

.metrics-table th {
    font-weight: 600; /* Slightly bolder labels */
    color: var(--text-dark);
}

.metrics-table td {
    text-align: right;
    font-size: 2rem; /* Significantly larger numbers */
    font-weight: 700;
    color: var(--accent-blue); /* Blue for values */
    white-space: nowrap; /* Prevent numbers from wrapping */
}

/* ------------------------- */
/* --- Chart Card (Right) --- */
/* ------------------------- */
.chart-card {
    grid-area: chart; /* Assign to the 'chart' grid area */
}

.chart-container {
    position: relative;
    height: 400px; /* Fixed height for consistency, can be adjusted */
    width: 100%; /* Ensure it takes full width of its parent */
}

/* ------------------------- */
/* --- Responsive Design --- */
/* ------------------------- */
@media (max-width: 992px) { /* Adjust breakpoint for tablet/smaller desktops */
    .dashboard-grid {
        /* Stack columns on smaller screens */
        grid-template-columns: 1fr; /* Single column */
        grid-template-areas:
            "metrics"
            "chart";
    }

    .dashboard-header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 600px) { /* Target typical smartphone portrait mode */
    .dashboard-header {
        padding: 1.2rem 0; /* Slightly reduce header padding */
        margin-bottom: 1rem; /* Reduce space after header */
    }

    .dashboard-header h1 {
        font-size: 1.6rem; /* Slightly smaller header font */
    }

    .dashboard-header .header-subtitle {
        font-size: 0.9rem; /* Slightly smaller subtitle font */
    }

    .dashboard-main {
        padding-bottom: 1rem; /* Reduce space before footer */
    }

    .dashboard-grid {
        gap: 1rem; /* Reduce gap between cards */
    }

    .dashboard-card {
        padding: 1rem; /* More compact card padding */
    }

    .dashboard-card h2 {
        font-size: 1.2rem; /* Smaller card title */
        margin-bottom: 0.8rem;
    }

    /* Metrics Card adjustments for mobile */
    .metrics-card .data-date {
        font-size: 0.85rem; /* Smaller date font */
        margin-bottom: 1rem; /* More compact date spacing */
    }

    .metrics-table th, .metrics-table td {
        padding: 0.8rem 0; /* More compact table row padding */
    }

    .metrics-table td {
        font-size: 1.5rem; /* Further reduce metric value size */
    }

    /* Chart Card adjustments for mobile */
    .chart-container {
        height: 250px; /* **KEY CHANGE: Significantly reduce chart height on mobile** */
    }
}

@media (max-width: 400px) { /* Optional: For very small/narrow smartphone screens */
    .dashboard-header h1 {
        font-size: 1.5rem;
    }
    .metrics-table td {
        font-size: 1.3rem; /* Smallest metric font for tightest fit */
    }
    .chart-container {
        height: 220px; /* Even smaller chart for very narrow screens */
    }
}