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

/* General Styling */
:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --secondary-color: #6c757d;
    --background-light: #f4f7f6;
    --background-dark: #e0e6e9;
    --card-background: #ffffff;
    --text-color: #343a40;
    --light-text-color: #6c757d;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --success-color: #28a745;
    --border-color: #e9ecef;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

body {
    font-family: 'Vazirmatn', sans-serif; /* استفاده از فونت فارسی جدید */
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #e0eafc, #cfdef3); /* گرادیانت پس‌زمینه */
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    box-sizing: border-box;
    direction: rtl;
    text-align: right;
    font-weight: 400;
}

.container {
    background-color: var(--card-background);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 35px;
    max-width: 550px;
    width: 100%;
    text-align: center;
    transition: all 0.3s ease-in-out;
}

h1 {
    color: var(--primary-dark);
    margin-bottom: 15px;
    font-size: 2em;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
h1 i {
    color: var(--primary-color);
}

h3 {
    color: var(--text-color);
    font-size: 1.3em;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    margin-top: 30px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}
h3 i {
    color: var(--primary-color);
}


.description {
    color: var(--light-text-color);
    font-size: 0.95em;
    margin-bottom: 30px;
    line-height: 1.7;
}

/* Status Box */
.status-box {
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.status-message {
    margin: 0;
    font-size: 1em;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}
.status-message i {
    color: var(--primary-color);
}
.status-message.error {
    color: var(--danger-color);
}
.status-message.success {
    color: var(--success-color);
}


.permission-btn {
    background-color: var(--success-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.05em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.permission-btn:hover {
    background-color: #218838;
    transform: translateY(-2px);
}
.permission-btn:active {
    transform: translateY(0);
}


/* Meter Panel */
.meter-panel {
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.gauge-container {
    position: relative;
    width: 200px; /* Increased size */
    height: 100px; /* Half of width */
    margin: 0 auto 20px;
    overflow: hidden;
    border-radius: 100px 100px 0 0;
    background-color: #e0e0e0; /* Base grey for gauge background */
}

.gauge-arc {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 200%; /* Double height for full circle effect */
    border-radius: 50%;
    background: conic-gradient(
        #dcdcdc 0% 50%, /* Base gray for empty part */
        #c0c0c0 50% 100% /* A slightly darker gray */
    );
    clip-path: polygon(0% 100%, 100% 100%, 100% 50%, 0% 50%); /* Only show bottom half */
    transform: rotate(90deg); /* Align to start at bottom-left */
}

.gauge-needle {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 4px; /* Needle width */
    height: 90px; /* Needle length (slightly less than radius) */
    background-color: var(--danger-color);
    transform-origin: bottom center;
    transition: transform 0.1s ease-out; /* Smooth needle movement */
    z-index: 10;
    border-radius: 2px 2px 0 0;
    transform: translateX(-50%) rotate(-90deg); /* Initial position: pointing left (0 magnitude) */
}

.gauge-value {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2.2em;
    font-weight: 700;
    color: var(--text-color);
    z-index: 11;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}


.unit {
    font-size: 0.9em;
    color: var(--light-text-color);
    margin-top: 10px;
}

.reading-label p {
    margin: 8px 0;
    font-size: 1.1em;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-end; /* Align to right for RTL */
}

.reading-label p i {
    color: var(--primary-color);
    font-size: 0.9em;
}

.reading-label span {
    font-weight: 700;
    color: var(--primary-dark);
}

/* Axis Readings */
.axis-readings {
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: right;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.axis-readings p {
    margin: 8px 0;
    font-size: 1.05em;
    color: var(--text-color);
}

.axis-readings span {
    font-weight: 700;
    color: var(--primary-dark);
}

/* Settings */
.settings {
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    text-align: right;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.settings label {
    display: block;
    margin-bottom: 12px;
    font-size: 0.98em;
    color: var(--text-color);
    font-weight: 600;
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.settings input[type="range"] {
    flex-grow: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
    cursor: pointer;
}

.settings input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: grab;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.2s ease;
}
.settings input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--primary-dark);
}

.settings input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: grab;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.2s ease;
}
.settings input[type="range"]::-moz-range-thumb:hover {
    background: var(--primary-dark);
}

.slider-value {
    font-weight: 700;
    color: var(--primary-dark);
    min-width: 30px; /* Ensure space for 2-digit numbers */
    text-align: left; /* Align value to left */
}

.checkbox-label {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    cursor: pointer;
    font-size: 1em;
    color: var(--text-color);
    gap: 8px;
}
.checkbox-label i {
    color: var(--primary-color);
}

.checkbox-label input[type="checkbox"] {
    margin-left: 10px;
    transform: scale(1.3);
    accent-color: var(--primary-color); /* Change checkbox color */
}


.btn {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: auto; /* Push button to the right in RTL */
}

.btn:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
}
.btn:active {
    transform: translateY(0);
}

/* Alert Indicator */
.alert-indicator {
    background-color: var(--danger-color);
    color: white;
    padding: 20px;
    border-radius: 12px;
    font-size: 1.6em;
    font-weight: 700;
    display: none; /* Hidden by default */
    animation: pulse 1.5s infinite ease-in-out;
    box-shadow: 0 5px 20px rgba(var(--danger-color-rgb), 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
.alert-indicator i {
    font-size: 1.2em;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.03); opacity: 0.9; }
    100% { transform: scale(1); opacity: 1; }
}

/* Responsive adjustments */
@media (max-width: 600px) {
    body {
        padding: 15px 10px;
    }
    .container {
        padding: 25px 20px;
        border-radius: 12px;
    }
    h1 {
        font-size: 1.6em;
        gap: 8px;
    }
    h3 {
        font-size: 1.1em;
        gap: 6px;
    }
    .description {
        font-size: 0.9em;
        margin-bottom: 20px;
    }
    .meter-panel, .axis-readings, .settings, .status-box {
        padding: 15px;
        margin-bottom: 20px;
    }
    .gauge-container {
        width: 160px;
        height: 80px;
        margin-bottom: 15px;
    }
    .gauge-value {
        font-size: 1.8em;
        bottom: 10px;
    }
    .gauge-needle {
        height: 70px;
    }
    .reading-label p {
        font-size: 1em;
        gap: 6px;
    }
    .permission-btn, .btn {
        padding: 10px 20px;
        font-size: 0.95em;
    }
    .alert-indicator {
        font-size: 1.4em;
        padding: 15px;
        gap: 8px;
    }
    .settings input[type="range"] {
        height: 6px;
    }
    .settings input[type="range"]::-webkit-slider-thumb,
    .settings input[type="range"]::-moz-range-thumb {
        width: 18px;
        height: 18px;
    }
    .slider-wrapper {
        gap: 10px;
    }
    .checkbox-label {
        font-size: 0.95em;
    }
}