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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --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);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 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;
}

/* Navigation */
.navbar {
    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: all 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

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

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    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);
}

.language-switcher {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--primary-color);
    color: white;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    z-index: 999;
    flex-direction: column;
    gap: 1rem;
}

.mobile-link {
    padding: 1rem;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.mobile-link:hover {
    background: var(--bg-light);
}

.mobile-lang {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    opacity: 0.05;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 3rem 0;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: var(--shadow-lg);
}

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

.app-preview {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    border: 8px solid #1f2937;
    border-radius: 40px;
    background: #000;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-screenshot {
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 800"><rect fill="%23ffffff" width="400" height="800"/><text x="200" y="400" font-family="Arial" font-size="48" fill="%236366f1" text-anchor="middle">Mindsy</text></svg>') center/cover;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-light);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    text-align: center;
    color: var(--text-dark);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.feature-desc {
    color: var(--text-light);
    line-height: 1.8;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: white;
}

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

.about-text {
    font-size: 1.2rem;
    color: var(--text-light);
    line-height: 2;
}

/* Page Content (Privacy, Terms) */
.page-content {
    padding: 8rem 0 4rem;
    min-height: 100vh;
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 2rem;
    text-align: center;
}

.content-section {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.intro-text {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.policy-section {
    margin-bottom: 2.5rem;
}

.policy-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.policy-section p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.last-updated {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    color: var(--text-light);
    font-style: italic;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.contact-info {
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-box {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 15px;
}

.info-box h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.info-box p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.email-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.2rem;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.footer-content {
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 0.7;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu.active {
        display: flex;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

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

    .content-section {
        padding: 2rem;
    }
}

@media (max-width: 640px) {
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: 50px;
    }

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

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

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

    .content-section {
        padding: 1.5rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

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

.hero-content,
.feature-card,
.content-section {
    animation: fadeIn 0.6s ease-out;
}

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