/* Base Styles */
:root {
    --primary-color: #1e88e5;
    --primary-dark: #1565c0;
    --secondary-color: #2c3e50;
    --accent-color: #ff9800;
    --light-bg: #f8f9fa;
    --border-color: #e1e4e8;
    --text-color: #3c4043;
    --light-text: #70757a;
    --dark-color: #202124;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    --border-radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-full {
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
}

/* Header Styles */
.header {
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo a {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.4rem;
}

.logo h1 {
    font-size: 1.4rem;
    margin: 0;
}

.main-nav ul {
    display: flex;
}

.main-nav li {
    margin: 0 15px;
}

.main-nav a {
    color: var(--dark-color);
    font-weight: 500;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    margin: 3px 0;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: 100px 0;
    background-color: var(--primary-color);
    text-align: center;
    color: white;
}

/* Convert Section */
.convert-section {
    padding: 80px 0;
    background-color: white;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    color: var(--dark-color);
    margin-bottom: 40px;
}

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

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 15px;
    text-align: center;
    background-color: #f8f9fa;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.tab-content {
    padding: 30px;
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
}

.file-upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.file-upload-area span {
    display: block;
    margin-bottom: 5px;
}

.file-types {
    font-size: 0.9rem;
    color: var(--light-text);
}

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

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30,136,229,0.15);
}

/* How it works section */
.how-it-works-section {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    width: 23%;
    text-align: center;
    padding: 20px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
}

.step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -10%;
    width: 20%;
    height: 2px;
    background-color: var(--border-color);
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 15px;
}

.step-content h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: 30px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    text-align: center;
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

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

/* Testimonials Section */
.testimonials-section {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.testimonials-slider {
    max-width: 800px;
    margin: 0 auto;
}

.testimonial {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin: 10px;
}

.testimonial-content {
    margin-bottom: 20px;
}

.testimonial-content p {
    font-style: italic;
    color: var(--text-color);
    line-height: 1.8;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

.author-info h4 {
    margin: 0;
    color: var(--dark-color);
}

.author-info p {
    margin: 0;
    color: var(--light-text);
    font-size: 0.9rem;
}

/* Pricing Section */
.pricing-section {
    padding: 80px 0;
    background-color: white;
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    width: 300px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.pricing-card.featured {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border: 2px solid var(--primary-color);
}

.ribbon {
    position: absolute;
    top: 20px;
    right: -50px;
    background-color: var(--accent-color);
    color: white;
    font-size: 0.8rem;
    padding: 5px 50px;
    transform: rotate(45deg);
    font-weight: 600;
    z-index: 10;
}

.pricing-header {
    background-color: var(--light-bg);
    padding: 30px 20px;
    text-align: center;
}

.pricing-header h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 10px;
}

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

.amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.pricing-features {
    padding: 30px 20px;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features i {
    margin-right: 10px;
    color: var(--primary-color);
}

.pricing-features .disabled {
    color: var(--light-text);
    text-decoration: line-through;
}

.pricing-features .disabled i {
    color: var(--light-text);
}

.pricing-footer {
    padding: 0 20px 30px;
}

/* Footer Section */
.footer {
    background-color: var(--secondary-color);
    padding: 80px 0 0;
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-about h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.footer-about p {
    margin-bottom: 20px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-flex;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    color: white;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
}

.footer-links h4,
.footer-newsletter h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after,
.footer-newsletter h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: rgba(255,255,255,0.7);
    transition: all 0.3s ease;
}

.footer-links ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-newsletter p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 15px;
}

.newsletter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.newsletter-form input {
    flex: 1;
    min-width: 150px;
    padding: 12px 15px;
    border: 1px solid rgba(255,255,255,0.1);
    background-color: rgba(255,255,255,0.05);
    color: white;
    border-radius: var(--border-radius);
}

.newsletter-form input::placeholder {
    color: rgba(255,255,255,0.5);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.newsletter-form button {
    min-width: 120px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}