:root {
    --primary: #4361ee;
    --primary-light: #4895ef;
    --secondary: #3a0ca3;
    --success: #4cc9f0;
    --dark: #2b2d42;
    --light: #f8f9fa;
    --gray: #8d99ae;
    --danger: #e63946;
    --warning: #fca311;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--secondary);
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    margin: 0 auto;
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 900px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

.calculator-card, .results-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    transition: var(--transition);
}

.calculator-card:hover, .results-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--primary);
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

input, select {
    width: 100%;
    padding: 14px 15px 14px 45px;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.range-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.range-container input[type="range"] {
    flex: 1;
    padding: 0;
}

.range-value {
    min-width: 60px;
    text-align: center;
    font-weight: 600;
    color: var(--primary);
}

.btn-calculate {
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    color: white;
    border: none;
    padding: 15px 25px;
    border-radius: var(--radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.btn-calculate:hover {
    background: linear-gradient(to right, var(--secondary), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.4);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.result-item {
    background: var(--light);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    border-left: 4px solid var(--primary);
}

.result-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin: 10px 0;
}

.result-label {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 600;
}

.profit-positive {
    color: #2ecc71;
}

.profit-negative {
    color: var(--danger);
}

.chart-container {
    height: 200px;
    margin: 25px 0;
    position: relative;
}

.breakdown-section {
    margin-top: 25px;
}

.breakdown-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--secondary);
}

.breakdown-list {
    list-style: none;
}

.breakdown-list li {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.breakdown-list li:last-child {
    border-bottom: none;
    font-weight: 700;
    color: var(--secondary);
}

.comparison-section {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    margin-top: 30px;
}

.comparison-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.comparison-item {
    background: var(--light);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.comparison-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.comparison-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 10px 0;
}

.savings-label {
    color: var(--gray);
    font-size: 0.9rem;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--gray);
    font-size: 0.9rem;
}

.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.tab {
    padding: 12px 20px;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray);
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.tab.active {
    color: var(--primary);
    border-bottom: 3px solid var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.info-tooltip {
    display: inline-block;
    margin-left: 5px;
    color: var(--gray);
    cursor: help;
}

.additional-options {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.toggle-options {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 15px;
}

.additional-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

@media (max-width: 600px) {
    .results-grid, .additional-inputs {
        grid-template-columns: 1fr;
    }
}