/* Reset و تنظیمات پایه */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* رنگ‌های تم روشن */
    --primary-color: #2E7D32;
    --primary-light: #4CAF50;
    --primary-dark: #1B5E20;
    --secondary-color: #0288D1;
    --secondary-light: #03A9F4;
    --secondary-dark: #01579B;
    --background-color: #f5f7fa;
    --surface-color: #ffffff;
    --text-primary: #263238;
    --text-secondary: #546E7A;
    --border-color: #E0E0E0;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #4CAF50;
    --primary-light: #66BB6A;
    --primary-dark: #388E3C;
    --secondary-color: #29B6F6;
    --secondary-light: #4FC3F7;
    --secondary-dark: #0288D1;
    --background-color: #121212;
    --surface-color: #1E1E1E;
    --text-primary: #E0E0E0;
    --text-secondary: #90A4AE;
    --border-color: #424242;
}

body {
    font-family: 'Vazirmatn', sans-serif;
    background: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
    padding: 20px;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* هدر */
.main-header {
    background: var(--surface-color);
    box-shadow: var(--shadow-sm);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.logo-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(var(--primary-color), 0.1);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(var(--primary-color), 0.1);
    font-weight: 600;
}

/* محاسبه‌گر */
.calculator-wrapper {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* مراحل */
.steps-nav {
    display: flex;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
}

.step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    padding: 0 1rem;
}

.step::after {
    content: '';
    position: absolute;
    top: 20px;
    right: 50%;
    width: 100%;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}

.step:last-child::after {
    display: none;
}

.step.active .step-number {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.step.active .step-title {
    color: var(--primary-color);
    font-weight: 600;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--background-color);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-bottom: 0.5rem;
    z-index: 2;
    position: relative;
    transition: var(--transition);
}

.step-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* فرم */
.calculator-form {
    padding: 2rem;
}

.form-step {
    display: none;
    animation: slideIn 0.3s ease;
}

.form-step.active {
    display: block;
}

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

.step-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--primary-dark);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--surface-color);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(var(--primary-color), 0.1);
}

.range-slider {
    margin-top: 0.5rem;
}

.range-slider input[type="range"] {
    width: 100%;
    margin: 0.5rem 0;
}

.range-values {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* تجهیزات */
.equipment-section {
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: var(--background-color);
    border-radius: var(--border-radius);
}

.equipment-section h3 {
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.equipment-card {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.equipment-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.equipment-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.equipment-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.equipment-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.counter {
    display: flex;
    align-items: center;
    background: var(--background-color);
    border-radius: 8px;
    overflow: hidden;
}

.counter-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.counter input {
    width: 50px;
    height: 36px;
    border: none;
    text-align: center;
    background: var(--surface-color);
    color: var(--text-primary);
}

.equipment-watt,
.equipment-type {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-color);
    color: var(--text-primary);
}

.usage-hours {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.usage-hours label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hours-input {
    width: 70px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    background: var(--surface-color);
    color: var(--text-primary);
}

/* لوازم سریع */
.quick-equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.quick-equipment {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.quick-equipment:hover {
    background: var(--background-color);
}

.quick-equipment label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.quick-equipment input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.equipment-name {
    font-weight: 500;
}

.hours-small {
    width: 60px;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-align: center;
    background: var(--surface-color);
    color: var(--text-primary);
}

/* منابع انرژی */
.energy-sources {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.energy-source-card {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.energy-source-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.energy-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tariff-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tariff-info {
    padding: 0.75rem;
    background: var(--background-color);
    border-radius: 8px;
    font-size: 0.9rem;
}

.tariff-info p {
    color: var(--text-secondary);
}

/* روشنایی */
.lighting-section {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.lighting-section h3 {
    margin-bottom: 1.5rem;
    color: var(--warning-color);
}

.lighting-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.lighting-type,
.lighting-count,
.usage-pattern {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* نتایج */
.summary-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.summary-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.summary-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.summary-unit {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* نمودارها */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-wrapper {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

/* پیشنهادات */
.recommendations {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
    border: 1px solid var(--border-color);
}

.recommendations h3 {
    margin-bottom: 1.5rem;
    color: var(--success-color);
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

/* دکمه‌ها */
.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.btn-prev,
.btn-next,
.btn-calculate,
.btn-reset,
.btn-download,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Vazirmatn', sans-serif;
}

.btn-prev {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

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

.btn-next:hover,
.btn-calculate:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

/* دکمه‌های رنگی */
.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

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

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

/* رسپانسیو */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .main-header {
        padding: 1rem;
    }
    
    .logo-section {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .main-nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .steps-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .step::after {
        display: none;
    }
    
    .form-grid,
    .equipment-grid,
    .quick-equipment-grid,
    .energy-sources,
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .calculator-form {
        padding: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn-prev,
    .btn-next,
    .btn-calculate,
    .btn-reset,
    .btn-download {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .step-title {
        font-size: 1.2rem;
    }
    
    .summary-value {
        font-size: 2rem;
    }
}