/* css/style.css */
:root {
    --primary-color: #4CAF50; /* Green */
    --primary-dark: #388E3C;
    --secondary-color: #FFC107; /* Amber */
    --accent-color: #03A9F4; /* Light Blue */
    --background-color: #f4f6f8;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-light-color: #757575;
    --border-color: #e0e0e0;
    --danger-color: #f44336;
    --warning-color: #FF9800;
    --info-color: #2196F3;
    --success-color: var(--primary-color);

    --font-family: 'Roboto', sans-serif;
    --border-radius: 4px;
    --box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Import Roboto font (optional, or use system fonts) */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

body {
    font-family: var(--font-family);
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* --- Header & Navigation --- */
header {
    background-color: var(--primary-color);
    color: var(--surface-color);
    padding: 15px 0;
    box-shadow: var(--box-shadow);
}
header h1 {
    margin: 0;
    font-size: 1.8em;
    font-weight: 500;
}
nav ul {
    list-style: none;
    padding: 0;
    margin: 10px 0 0 0;
    display: flex;
    flex-wrap: wrap;
}
nav ul li {
    margin-right: 15px;
}
nav ul li a {
    color: var(--surface-color);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease-in-out;
}
nav ul li a:hover, nav ul li a.active {
    background-color: var(--primary-dark);
}

/* --- Main Content --- */
main.container {
    padding-top: 20px;
    padding-bottom: 40px;
}

.page-content h2 {
    color: var(--primary-dark);
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

/* --- Cards --- */
.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--box-shadow);
}
.card h2, .card h3 {
    margin-top: 0;
    color: var(--primary-dark);
}
.card h3 { font-size: 1.3em; }

/* --- Forms --- */
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-light-color);
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="time"],
.form-group select,
.form-group textarea {
    width: calc(100% - 22px); /* Account for padding and border */
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1em;
    box-sizing: border-box;
}
.form-group input[type="checkbox"],
.form-group input[type="radio"] {
    margin-right: 5px;
    vertical-align: middle;
}
.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-light-color);
    font-size: 0.9em;
}
.days-of-week-selector label {
    margin-right: 15px;
    font-weight: normal;
}
.schedule-pump-item {
    padding: 10px;
    border: 1px solid #eee;
    margin-bottom: 10px;
    border-radius: var(--border-radius);
}
.schedule-pump-item label { font-weight: normal; }
.pump-volume-input { margin-top: 5px; }

/* --- Buttons --- */
.button, button {
    background-color: var(--text-light-color);
    color: var(--surface-color);
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.2s ease-in-out;
    margin-right: 5px;
}
.button:hover, button:hover {
    opacity: 0.9;
}
.button-primary, button.button-primary {
    background-color: var(--primary-color);
}
.button-primary:hover {
    background-color: var(--primary-dark);
}
.button-danger {
    background-color: var(--danger-color);
}
.button-danger:hover {
    background-color: #d32f2f; /* Darker red */
}

/* --- Tables --- */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}
table th, table td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
}
table th {
    background-color: #f9f9f9;
    font-weight: 500;
    color: var(--primary-dark);
}
table tbody tr:nth-child(even) {
    background-color: #fdfdfd;
}
table tbody tr:hover {
    background-color: #f1f1f1;
}
table .actions a { margin-right: 8px; }

/* --- Status Messages --- */
.status-message {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    display: none; /* Hidden by default, shown by JS */
    border: 1px solid transparent;
}
.status-message.success {
    background-color: #e8f5e9; /* Light green */
    color: var(--primary-dark);
    border-color: #a5d6a7;
    display: block;
}
.status-message.error {
    background-color: #ffebee; /* Light red */
    color: var(--danger-color);
    border-color: #ef9a9a;
    display: block;
}
.status-message.info {
    background-color: #e3f2fd; /* Light blue */
    color: var(--info-color);
    border-color: #90caf9;
    display: block;
}
.warning-message {
    background-color: #fff3e0; /* Light orange */
    color: var(--warning-color);
    border: 1px solid #ffcc80;
    padding: 10px;
    border-radius: var(--border-radius);
}

/* --- Dashboard Specific --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.tank-visual-container {
    text-align: center;
}
#tank-visual {
    width: 100px;
    height: 200px; /* Fixed height for the visual */
    border: 2px solid var(--primary-dark);
    border-radius: var(--border-radius);
    margin: 10px auto;
    position: relative;
    overflow: hidden; /* To clip the water level */
    background-color: #e0f7fa; /* Light blue for empty part */
}
#water-level-indicator {
    background-color: var(--accent-color); /* Water color */
    width: 100%;
    height: 0%; /* Will be set by JS */
    position: absolute;
    bottom: 0;
    left: 0;
    transition: height 0.5s ease-out;
}
#pumps-status-list p, #system-status-content p, #next-schedule-content p {
    margin: 8px 0;
}
#pumps-status-list strong, #system-status-content strong, #next-schedule-content strong {
    color: var(--text-light-color);
}

/* --- Logs & Charts --- */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.chart-card {
    background-color: var(--surface-color);
    padding: 15px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    height: 350px; /* <<<<<<----- ADD OR ADJUST THIS ----- */
    display: flex; /* Added for better internal layout of canvas */
    flex-direction: column; /* Stack title and canvas vertically */
}

.chart-card h3 {
    margin-top: 0;
    margin-bottom: 10px; /* Space between title and chart */
    flex-shrink: 0; /* Prevent title from shrinking */
}

/* Make canvas take up remaining space in flex container */
.chart-card canvas {
    flex-grow: 1;
    /* The max-width and max-height help ensure it doesn't overflow
       its parent if maintainAspectRatio was true, but with it false,
       it should respect the canvas element's actual size which is
       influenced by the flex-grow here. */
    max-width: 100%;
    /* max-height: 100%; (might not be strictly needed if parent height is fixed and flex-grow is used) */
}

/* --- Footer --- */
footer {
    background-color: #333;
    color: #f4f4f4;
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
}
footer p { margin: 0; }

/* Responsive adjustments */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
    }
    nav ul li {
        margin-right: 0;
        margin-bottom: 5px;
    }
    .dashboard-grid, .charts-container {
        grid-template-columns: 1fr; /* Stack cards on smaller screens */
    }
}