/* Weight Loss Progress Tracker - Modern White & Purple Theme */

:root {
    --primary-purple: #8e44ad;
    --primary-purple-light: #9b59b6;
    --primary-purple-dark: #6c3483;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --border-gray: #e9ecef;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --success-green: #2ecc71;
    --warning-orange: #f39c12;
    --danger-red: #e74c3c;
    --info-blue: #3498db;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --shadow-hover: 0 15px 40px rgba(142,68,173,0.2);
    --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Container Styles */
.wlt-container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Main Card */
.wlt-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid rgba(142,68,173,0.1);
}

.wlt-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.wlt-title {
    color: var(--primary-purple-dark);
    font-size: 2.2em;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
    position: relative;
    padding-bottom: 15px;
}

.wlt-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-bg);
    border-radius: 2px;
}

/* Form Styles */
.wlt-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.wlt-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .wlt-form-row {
        grid-template-columns: 1fr;
    }
}

.wlt-form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.wlt-form-group label {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.95em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wlt-input {
    padding: 12px 15px;
    border: 2px solid var(--border-gray);
    border-radius: 12px;
    font-size: 1em;
    transition: all 0.3s ease;
    background: var(--light-gray);
    color: var(--text-dark);
}

.wlt-input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(142,68,173,0.1);
    background: var(--white);
}

/* Radio Group */
.wlt-radio-group {
    display: flex;
    gap: 20px;
    align-items: center;
    background: var(--light-gray);
    padding: 10px 15px;
    border-radius: 12px;
    border: 2px solid var(--border-gray);
}

.wlt-radio {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    color: var(--text-dark);
}

.wlt-radio input[type="radio"] {
    accent-color: var(--primary-purple);
    width: 18px;
    height: 18px;
}

/* Unit Toggle */
.wlt-unit-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.wlt-unit-btn {
    padding: 8px 20px;
    border: 2px solid var(--border-gray);
    background: var(--white);
    color: var(--text-dark);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.9em;
    flex: 1;
}

.wlt-unit-btn:hover {
    border-color: var(--primary-purple);
    background: var(--light-gray);
}

.wlt-unit-btn.active {
    background: var(--primary-purple);
    color: var(--white);
    border-color: var(--primary-purple);
}

/* Height Inputs */
.wlt-height-inputs > div {
    display: none;
}

.wlt-height-inputs > div.active {
    display: flex;
    gap: 10px;
}

.wlt-feet-input {
    display: flex;
    gap: 10px;
}

.wlt-feet-input .wlt-input {
    flex: 1;
}

/* Submit Button */
.wlt-submit-btn {
    background: var(--gradient-bg);
    color: var(--white);
    border: none;
    padding: 16px 30px;
    border-radius: 50px;
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(142,68,173,0.3);
}

.wlt-submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(142,68,173,0.4);
}

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

/* Results Section */
.wlt-result {
    margin-top: 40px;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.wlt-result-title {
    color: var(--primary-purple-dark);
    font-size: 1.8em;
    margin-bottom: 30px;
    text-align: center;
}

/* BMI Card */
.wlt-bmi-card {
    background: var(--gradient-bg);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    margin-bottom: 30px;
    color: var(--white);
}

.wlt-bmi-value {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.wlt-bmi-number {
    font-size: 2.5em;
    font-weight: 800;
    margin-left: 10px;
}

.wlt-bmi-category {
    font-size: 1.8em;
    font-weight: 700;
    background: rgba(255,255,255,0.2);
    display: inline-block;
    padding: 8px 30px;
    border-radius: 50px;
}

/* Progress Bars */
.wlt-progress-container {
    margin: 20px 0;
}

.wlt-progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
}

.wlt-progress-bar {
    height: 20px;
    background: var(--light-gray);
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid var(--border-gray);
}

.wlt-progress-fill {
    height: 100%;
    border-radius: 8px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Info Grid */
.wlt-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 30px 0;
}

@media (max-width: 768px) {
    .wlt-info-grid {
        grid-template-columns: 1fr;
    }
}

.wlt-info-card {
    background: var(--light-gray);
    padding: 25px;
    border-radius: 16px;
    border: 2px solid var(--border-gray);
    transition: all 0.3s ease;
}

.wlt-info-card:hover {
    border-color: var(--primary-purple);
    background: var(--white);
}

.wlt-info-card h4 {
    color: var(--primary-purple-dark);
    margin-bottom: 15px;
    font-size: 1.2em;
}

.wlt-info-card p {
    color: var(--text-dark);
    font-size: 1.4em;
    font-weight: 700;
}

/* Motivation Message */
.wlt-motivation {
    background: linear-gradient(135deg, #f6f0ff 0%, #f0e6ff 100%);
    padding: 25px;
    border-radius: 16px;
    margin: 30px 0;
    border-left: 6px solid var(--primary-purple);
    animation: slideInRight 0.5s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.wlt-motivation-text {
    font-size: 1.3em;
    color: var(--primary-purple-dark);
    font-style: italic;
    line-height: 1.6;
}

/* Health Tips */
.wlt-tips {
    background: var(--light-gray);
    padding: 25px;
    border-radius: 16px;
    margin: 30px 0;
}

.wlt-tips h4 {
    color: var(--primary-purple-dark);
    margin-bottom: 20px;
    font-size: 1.3em;
}

.wlt-tips ul {
    list-style: none;
    padding: 0;
}

.wlt-tips li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-dark);
    border-bottom: 1px dashed var(--border-gray);
}

.wlt-tips li:last-child {
    border-bottom: none;
}

.wlt-tips li:before {
    content: '✓';
    color: var(--primary-purple);
    position: absolute;
    left: 0;
    font-weight: 700;
}

/* Chart Container */
.wlt-chart-container {
    height: 300px;
    margin: 40px 0;
    padding: 20px;
    background: var(--white);
    border-radius: 16px;
    border: 2px solid var(--border-gray);
}

/* Action Buttons */
.wlt-action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.wlt-share-btn,
.wlt-print-btn {
    padding: 12px 25px;
    border: none;
    border-radius: 50px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.wlt-print-btn {
    background: var(--text-dark);
    color: var(--white);
}

.wlt-share-btn:hover,
.wlt-print-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Share Options */
.wlt-share-options {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
    padding: 15px;
    background: var(--light-gray);
    border-radius: 50px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.wlt-share-options a {
    padding: 8px 15px;
    border-radius: 25px;
    text-decoration: none;
    color: var(--white);
    font-weight: 600;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

#share-whatsapp { background: #25D366; }
#share-facebook { background: #1877F2; }
#share-twitter { background: #1DA1F2; }
#copy-link { background: var(--text-dark); }

.wlt-share-options a:hover {
    transform: translateY(-2px);
    filter: brightness(110%);
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .wlt-container {
        background: transparent;
    }
    
    .wlt-card {
        background: #2c3e50;
        border-color: #34495e;
    }
    
    .wlt-title {
        color: var(--white);
    }
    
    .wlt-form-group label {
        color: var(--light-gray);
    }
    
    .wlt-input {
        background: #34495e;
        border-color: #465c6e;
        color: var(--white);
    }
    
    .wlt-input:focus {
        background: #2c3e50;
    }
    
    .wlt-radio-group {
        background: #34495e;
        border-color: #465c6e;
    }
    
    .wlt-radio {
        color: var(--white);
    }
    
    .wlt-info-card {
        background: #34495e;
        border-color: #465c6e;
    }
    
    .wlt-info-card h4 {
        color: var(--white);
    }
    
    .wlt-info-card p {
        color: var(--light-gray);
    }
    
    .wlt-tips {
        background: #34495e;
    }
    
    .wlt-tips li {
        color: var(--light-gray);
        border-bottom-color: #465c6e;
    }
    
    .wlt-progress-header {
        color: var(--light-gray);
    }
    
    .wlt-progress-bar {
        background: #34495e;
        border-color: #465c6e;
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    .wlt-card {
        padding: 20px;
    }
    
    .wlt-title {
        font-size: 1.8em;
    }
    
    .wlt-bmi-number {
        font-size: 2em;
    }
    
    .wlt-bmi-category {
        font-size: 1.4em;
    }
    
    .wlt-action-buttons {
        flex-direction: column;
    }
    
    .wlt-share-options {
        flex-wrap: wrap;
    }
}

/* Loading Animation */
.wlt-loading {
    display: inline-block;
    width: 30px;
    height: 30px;
    border: 3px solid rgba(142,68,173,0.3);
    border-radius: 50%;
    border-top-color: var(--primary-purple);
    animation: spin 1s ease-in-out infinite;
}

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

/* Category-specific styles */
.wlt-bmi-category.underweight { color: var(--info-blue); }
.wlt-bmi-category.normal { color: var(--success-green); }
.wlt-bmi-category.overweight { color: var(--warning-orange); }
.wlt-bmi-category.obese { color: var(--danger-red); }