/**
 * Sludge Age Calculator Styles
 * A modern, neumorphic design with light/dark mode support
 */

/* Base styles and CSS variables */
:root {
    --primary-color: #4a8ef7;
    --primary-dark: #3a7ae6;
    --success-color: #28a745;
    --bg-color: #f0f4f8;
    --card-bg: #ffffff;
    --border-radius: 12px;
    --box-shadow: 8px 8px 15px rgba(174, 174, 192, 0.4), -8px -8px 15px rgba(255, 255, 255, 0.8);
    --inner-shadow: inset 3px 3px 6px rgba(174, 174, 192, 0.2), inset -3px -3px 6px rgba(255, 255, 255, 0.7);
    --text-color: #333;
    --text-muted: #6c757d;
    --border-color: #e1e5eb;
    --input-bg: #f5f7fa;
    --transition: all 0.3s ease;
}

/* Dark theme variables */
.dark-theme {
    --primary-color: #5c9aff;
    --primary-dark: #4a8ef7;
    --success-color: #28a745;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --box-shadow: 8px 8px 15px rgba(0, 0, 0, 0.5), -8px -8px 15px rgba(30, 30, 30, 0.5);
    --inner-shadow: inset 3px 3px 6px rgba(0, 0, 0, 0.5), inset -3px -3px 6px rgba(30, 30, 30, 0.5);
    --text-color: #e0e0e0;
    --text-muted: #adb5bd;
    --border-color: #333;
    --input-bg: #2c2c2c;
}

/* Main container */
.sludge-age-calculator-container {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 800px;
    margin: 30px auto;
    color: var(--text-color);
    background-color: var(--bg-color);
    padding: 25px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

/* Card styles */
.sac-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
    margin-top: 20px;
}

.sac-card-header {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.sac-card-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.sac-description {
    color: var(--text-muted);
    margin: 10px 0 0;
    font-size: 16px;
}

.sac-card-body {
    padding: 25px;
}

.sac-card-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--border-color);
}

/* Form styles */
.sac-input-group {
    margin-bottom: 20px;
}

.sac-input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.sac-input-group label i {
    margin-right: 8px;
    color: var(--primary-color);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 12px 15px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--input-bg);
    box-shadow: var(--inner-shadow);
    color: var(--text-color);
    font-size: 16px;
    transition: var(--transition);
}

.input-wrapper input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.input-wrapper .unit {
    position: absolute;
    right: 15px;
    color: var(--text-muted);
    font-size: 14px;
    pointer-events: none;
}

/* Button styles */
.sac-button-container {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.sac-button {
    flex: 1;
    padding: 12px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sac-button i {
    margin-right: 8px;
}

.sac-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.sac-button:active {
    transform: translateY(0);
    box-shadow: var(--inner-shadow);
}

.sac-button-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.sac-button-secondary:hover {
    background-color: var(--border-color);
    color: var(--text-color);
}

/* Results section */
.sac-result {
    margin-top: 30px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    opacity: 1;
    transform: translateY(0);
}

.sac-result.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.sac-result-header {
    background-color: var(--success-color);
    color: white;
    padding: 15px;
    font-weight: 600;
    font-size: 18px;
}

.sac-result-header i {
    margin-right: 8px;
}

.sac-result-content {
    background-color: var(--card-bg);
    padding: 20px;
}

.sac-result-content p {
    margin: 10px 0;
    font-size: 16px;
}

.sac-formula {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--input-bg);
    border-radius: var(--border-radius);
}

/* Info toggle */
.sac-info-toggle {
    color: var(--primary-color);
    cursor: pointer;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
}

.sac-info-toggle i {
    margin-right: 5px;
}

.sac-info-content {
    padding: 15px 0 0;
    margin-top: 15px;
    border-top: 1px solid var(--border-color);
    transition: var(--transition);
}

.sac-info-content.hidden {
    display: none;
}

.sac-info-content h4 {
    margin: 15px 0 8px;
    font-size: 16px;
    color: var(--primary-color);
}

.sac-info-content p {
    margin: 8px 0;
    font-size: 14px;
    line-height: 1.6;
}

.sac-info-content ul {
    margin: 10px 0;
    padding-left: 20px;
}

.sac-info-content ul li {
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.6;
}

/* Theme toggle switch */
.sac-theme-toggle {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.sac-theme-toggle i {
    margin: 0 8px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--input-bg);
    transition: var(--transition);
    border-radius: 34px;
    box-shadow: var(--inner-shadow);
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: var(--primary-color);
    transition: var(--transition);
    border-radius: 50%;
    box-shadow: var(--box-shadow);
}

input:checked + .slider {
    background-color: var(--text-muted);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Responsive styles */
@media (max-width: 768px) {
    .sludge-age-calculator-container {
        padding: 15px;
        margin: 15px;
    }
    
    .sac-button-container {
        flex-direction: column;
    }
    
    .sac-card-header h2 {
        font-size: 20px;
    }
    
    .sac-card-body, .sac-card-header, .sac-card-footer {
        padding: 15px;
    }
}

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

.fadeIn {
    animation: fadeIn 0.5s ease forwards;
}

/* Loading spinner */
.sac-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

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

/* Error message */
.sac-error {
    color: #dc3545;
    background-color: rgba(220, 53, 69, 0.1);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    margin-top: 20px;
    display: none;
}

.sac-error.show {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}