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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 20px;
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

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

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
    position: relative;
}

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

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

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-dark);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--text-dark);
    border-color: var(--border-color);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(135deg, rgba(37, 99, 235, 0.9) 0%, rgba(16, 185, 129, 0.9) 100%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%23ffffff" opacity="0.1" width="1200" height="600"/><circle cx="100" cy="100" r="50" fill="%23ffffff" opacity="0.05"/><circle cx="900" cy="400" r="100" fill="%23ffffff" opacity="0.05"/><circle cx="600" cy="300" r="75" fill="%23ffffff" opacity="0.05"/></svg>');
    background-size: cover;
    animation: backgroundMove 20s ease-in-out infinite;
}

@keyframes backgroundMove {
    0%, 100% { transform: scale(1) translateX(0); }
    50% { transform: scale(1.05) translateX(10px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--text-white);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.highlight {
    color: #fbbf24;
    position: relative;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

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

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ===== Section Styles ===== */
.section {
    padding: 5rem 0;
}

.section-dark {
    background: var(--bg-dark);
    color: var(--text-white);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

/* ===== About Section ===== */
.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.card-description {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Advantages Section ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.advantage-item {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.advantage-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.advantage-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 1rem;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.advantage-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

/* ===== How It Works Section ===== */
.steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 30px;
    top: 70px;
    width: 2px;
    height: calc(100% + 1rem);
    background: var(--border-color);
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.step-content {
    flex: 1;
    padding-top: 0.5rem;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-description {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Pricing Section ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-xl);
}

.pricing-card-featured {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-color);
    color: var(--text-white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.pricing-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.pricing-price {
    margin-bottom: 2rem;
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 600;
}

.price-period {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

/* ===== Contact Section ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.contact-item {
    text-align: center;
}

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

.contact-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-light);
}

.contact-form {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-brand .logo-icon {
    width: 50px;
    height: 50px;
    filter: brightness(0) invert(1);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-description {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        gap: 2rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .pricing-card-featured {
        transform: scale(1);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* ===== Progress Bar ===== */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 9999;
    transition: width 0.1s ease;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.3);
}

/* ===== Back to Top Button ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

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

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.scroll-reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.scroll-reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
}