/* Reset und Grundstile */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #fcae1e;
    --primary-dark: #e09a0a;
    --primary-light: #fdc85a;
    --secondary-color: #2c3e50;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --background-light: #f8f9fa;
    --white: #ffffff;
    --border-color: #e9ecef;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--text-dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--background-light) 0%, var(--white) 100%);
    padding: 120px 0 80px;
    margin-top: 70px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.7;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator-preview {
    width: 200px;
    height: 200px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--white);
    box-shadow: var(--shadow-hover);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Calculator Section */
.calculator-section {
    padding: 80px 0;
    background: var(--background-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* Variant Selector */
.variant-selector {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.variant-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: var(--white);
    border: 2px solid var(--border-color);
    padding: 20px 30px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    min-width: 150px;
}

.variant-btn i {
    font-size: 2rem;
    color: var(--text-light);
    transition: var(--transition);
}

.variant-btn:hover,
.variant-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.variant-btn:hover i,
.variant-btn.active i {
    color: var(--white);
}

/* Calculator Container */
.calculator-container {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.calculator-container.active {
    display: block;
}

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

.calculator-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.calculator-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 30px;
    text-align: center;
}

.calculator-header h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.calculator-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Form Styles */
.calculator-form {
    padding: 40px;
}

.form-section {
    margin-bottom: 30px;
}

.form-section h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.form-section h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

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

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

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(252, 174, 30, 0.1);
}

.calculate-btn {
    width: 100%;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.calculate-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Result Display */
.result-display {
    background: var(--background-light);
    padding: 30px;
    border-top: 1px solid var(--border-color);
}

.result-breakdown {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-section {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
    border-bottom: none;
}

.result-item.total {
    background: var(--primary-color);
    color: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 20px;
}

.result-label {
    font-weight: 500;
}

.result-value {
    font-weight: 600;
    color: var(--primary-color);
}

.result-item.total .result-value {
    color: var(--white);
}

/* About Section */
.about-section {
    padding: 80px 0;
    background: var(--white);
}

.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 40px;
    line-height: 1.7;
}

.features {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    color: var(--text-dark);
}

.feature i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo-img {
    height: 30px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-info p {
    margin-bottom: 5px;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-link:hover {
    opacity: 1;
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav {
        display: none;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .variant-selector {
        flex-direction: column;
        align-items: center;
    }

    .variant-btn {
        width: 100%;
        max-width: 300px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .calculator-form {
        padding: 20px;
    }

    .features {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .calculator-preview {
        width: 150px;
        height: 150px;
        font-size: 3rem;
    }

    .variant-btn {
        padding: 15px 20px;
        min-width: 120px;
    }

    .variant-btn i {
        font-size: 1.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

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