/* =================================================================
   Online-Taschenrechner - Professional Calculator Directory
   Website: https://internetgemein.de/
   ================================================================= */

/* === Variables de Color === */
:root {
    --primary-color: #f81808;
    --secondary-color: #e7ca24;
    --accent-color: #f0c91b;
    --accent-hover: #000000;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --white: #ffffff;
    --text-dark: #000000;
    --text-light: #000000;
    --border-color: #dbb715;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
    --transition: all 0.1s ease;
}

/* === Reset y Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-bg);
    overflow-x: hidden;
}

/* === Header y Navegación === */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: var(--white);
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: var(--transition);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* === Hero Section === */
.hero {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
    animation: fadeIn 0.8s ease;
}

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

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.95;
}

/* === Main Container === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* === Calculator Grid === */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    animation: fadeInUp 0.8s ease;
}

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

.calculator-card {
    background: var(--white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--success-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.calculator-card:hover::before {
    transform: scaleX(1);
}

.calculator-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.calculator-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
    transition: var(--transition);
}

.calculator-card:hover .calculator-icon {
    transform: scale(1.2) rotate(5deg);
}

.calculator-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.calculator-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* === Calculator Page Styles === */
.calculator-container {
    background: var(--white);
    border-radius: 10px;
    padding: 3rem;
    box-shadow: var(--shadow);
    max-width: 800px;
    margin: 0 auto;
    animation: fadeIn 0.6s ease;
}

.calculator-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.calculator-description {
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
    text-align: center;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: 8px;
}

.calculator-form {
    margin: 2rem 0;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: var(--white);
    padding: 1rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin-top: 1rem;
}

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

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

.result-box {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, var(--success-color), #229954);
    color: var(--white);
    border-radius: 10px;
    text-align: center;
    animation: slideIn 0.5s ease;
    display: none;
}

.result-box.show {
    display: block;
}

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

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 1rem 0;
}

.result-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* === Info Sections === */
.info-section {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 10px;
}

.info-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.info-section p,
.info-section ul {
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.info-section ul {
    padding-left: 2rem;
}

.info-section li {
    margin-bottom: 0.5rem;
}

/* === Footer === */
footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 3rem 2rem 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    opacity: 0.9;
}

.footer-section a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .header-container {
        padding: 1rem;
    }
    
    .menu-toggle {
        display: block;
    }
    
    nav ul {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-color);
        flex-direction: column;
        gap: 0;
        padding: 1rem;
        display: none;
    }
    
    nav ul.active {
        display: flex;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 1rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .calculator-container {
        padding: 1.5rem;
    }
    
    .calculator-title {
        font-size: 1.5rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .container {
        padding: 2rem 1rem;
    }
    
    .hero {
        padding: 3rem 1rem;
    }
}

/* === Scroll Animation === */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.active {
    opacity: 1;
    transform: translateY(0);
}

/* === Loading Animation === */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--white);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
}

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

/* === Additional Calculator Styles === */
.input-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.radio-group {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
    cursor: pointer;
}

.radio-group input[type="radio"] {
    width: auto;
    cursor: pointer;
}

.result-details {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
    color: var(--text-dark);
}

.result-details h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

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

/* === Back Button === */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    text-decoration: none;
    margin-bottom: 2rem;
    font-weight: 600;
    transition: var(--transition);
}

.back-button:hover {
    gap: 0.8rem;
}

/* === Page Specific Styles === */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.content-section {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.content-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.content-section p {
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* Contact Form */
.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

/* Success Message */
.success-message {
    background: var(--success-color);
    color: var(--white);
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
    display: none;
}

.success-message.show {
    display: block;
    animation: slideIn 0.5s ease;
}