/* LED Controller Web-BLE Interface Styles */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2196F3;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --dark-bg: #1a1a2e;
    --card-bg: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #0f4c75;
    --hover-bg: #1e3a5f;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #0f3460 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1em;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.card h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    font-size: 1.5em;
}

.hidden {
    display: none !important;
}

/* Connection Status */
.connection-status {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.status-indicator {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.disconnected {
    background: var(--danger-color);
}

.status-indicator.connected {
    background: var(--success-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="number"],
.form-group select {
    width: 100%;
    padding: 12px;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1em;
}

.form-group input[type="number"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.form-group input[type="file"] {
    width: 100%;
    padding: 10px;
    background: var(--dark-bg);
    border: 2px dashed var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-warning {
    background: var(--warning-color);
    color: white;
}

.btn-secondary {
    background: var(--border-color);
    color: white;
}

.btn-mode {
    background: var(--hover-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-mode:hover {
    background: var(--primary-color);
}

/* Button Grid */
.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

/* Current Mode Display */
.current-mode {
    background: var(--dark-bg);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.1em;
    border: 1px solid var(--border-color);
}

.current-mode span {
    color: var(--primary-color);
    font-weight: bold;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    height: 40px;
    background: var(--dark-bg);
    border-radius: 20px;
    overflow: hidden;
    margin: 20px 0;
    position: relative;
    border: 1px solid var(--border-color);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Warning Box */
.warning {
    background: rgba(255, 152, 0, 0.1);
    border: 1px solid var(--warning-color);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
    color: var(--warning-color);
    font-weight: 500;
}

/* Divider */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: 20px 0;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--text-secondary);
}

footer small {
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 600px) {
    header h1 {
        font-size: 2em;
    }
    
    .button-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .btn {
        font-size: 0.9em;
        padding: 10px 16px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease;
}