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

:root {
    --primary-color: #007AFF;
    --primary-dark: #0051D5;
    --secondary-color: #5856D6;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --border-color: #D2D2D7;
    --success-color: #34C759;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: 16px;
}

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

/* Navigation */
.navbar {
    background: rgba(255,255,255,0.8);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 1000;
    backdrop-filter: blur(10px);
}
.navbar .container { display: flex; justify-content: space-between; align-items: center; padding: 1rem 20px; }
.nav-brand { display: flex; align-items: center; gap: 0.75rem; font-size: 1.5rem; font-weight: 700; color: var(--text-primary); text-decoration: none; }
.nav-back { font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); text-decoration: none; border: 1px solid var(--border-color); border-radius: 8px; padding: 0.25rem 0.6rem; transition: var(--transition); white-space: nowrap; }
.nav-back:hover { color: var(--primary-color); border-color: var(--primary-color); }
.logo-icon { height: 1.8rem; max-height: 1.8rem; width: auto; max-width: 1.8rem; object-fit: contain; display: block; }
.nav-menu { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-menu a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: var(--transition); position: relative; }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary-color); }
.nav-menu a.active::after { content: ''; position: absolute; bottom: -5px; left: 0; right: 0; height: 2px; background: var(--primary-color); }
.nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { width: 25px; height: 2px; background: var(--text-primary); transition: var(--transition); }

/* Hero */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1c3a5e 0%, #2d6a9f 50%, #1a8fe0 100%);
    color: white;
    min-height: 80vh;
    display: flex;
    align-items: center;
}
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-content { max-width: 600px; }
.hero-title { font-size: 4rem; font-weight: 700; margin-bottom: 1rem; line-height: 1.1; }
.hero-subtitle { font-size: 1.5rem; margin-bottom: 1rem; opacity: 0.9; }
.hero-description { font-size: 1.1rem; margin-bottom: 2rem; opacity: 0.8; line-height: 1.7; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-image { display: flex; justify-content: center; align-items: center; position: relative; min-height: 400px; }
.ipad-screenshot { width: 100%; max-width: 400px; height: auto; border-radius: 20px; box-shadow: var(--shadow-lg); position: relative; z-index: 1; }
.iphone-screenshot { width: 100%; max-width: 200px; height: auto; border-radius: 20px; box-shadow: var(--shadow-lg); position: absolute; right: 0; top: 50%; transform: translateY(-50%); z-index: 2; margin-right: -50px; }

/* Buttons */
.btn { display: inline-block; padding: 0.75rem 2rem; border-radius: 12px; text-decoration: none; font-weight: 600; transition: var(--transition); border: none; cursor: pointer; font-size: 1rem; text-align: center; }
.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-secondary { background: rgba(255,255,255,0.2); color: white; border: 1px solid rgba(255,255,255,0.3); }
.btn-secondary:hover { background: rgba(255,255,255,0.3); }
.btn-large { padding: 1rem 2.5rem; font-size: 1.1rem; }

/* Features */
.features { padding: 5rem 0; background: var(--bg-secondary); }
.section-title { font-size: 2.5rem; font-weight: 700; text-align: center; margin-bottom: 3rem; color: var(--text-primary); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-card { background: white; padding: 2rem; border-radius: 16px; box-shadow: var(--shadow); transition: var(--transition); }
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.feature-icon { font-size: 3rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--text-primary); }
.feature-card p { color: var(--text-secondary); line-height: 1.7; }

/* Privacy Highlight */
.privacy-highlight {
    padding: 5rem 0;
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    color: white;
}
.privacy-content { max-width: 800px; margin: 0 auto; text-align: center; }
.privacy-highlight .section-title { color: white; }
.privacy-description { font-size: 1.2rem; margin-bottom: 2rem; opacity: 0.9; }
.privacy-features { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 2rem; text-align: left; max-width: 500px; margin-left: auto; margin-right: auto; }
.privacy-feature { display: flex; align-items: center; gap: 1rem; font-size: 1.1rem; }
.check-icon { background: white; color: var(--success-color); width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }

/* CTA */
.cta { padding: 5rem 0; text-align: center; background: var(--bg-primary); }
.cta h2 { font-size: 2.5rem; margin-bottom: 1rem; color: var(--text-primary); }
.cta p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 2rem; }

/* Page Content */
.page-content { padding: 3rem 0; min-height: 70vh; }
.page-header { text-align: center; margin-bottom: 3rem; }
.page-header h1 { font-size: 3rem; font-weight: 700; margin-bottom: 1rem; color: var(--text-primary); }
.page-subtitle { font-size: 1.2rem; color: var(--text-secondary); }

/* Support */
.support-section { margin-bottom: 4rem; }
.support-section h2 { font-size: 2rem; margin-bottom: 2rem; color: var(--text-primary); }
.support-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 3rem; }
.support-card { background: white; padding: 2rem; border-radius: 16px; box-shadow: var(--shadow); text-align: center; transition: var(--transition); display: block; text-decoration: none; color: inherit; cursor: pointer; }
.support-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.support-card:visited { color: inherit; }
.support-icon { font-size: 3rem; margin-bottom: 1rem; }
.support-card h3 { font-size: 1.3rem; margin-bottom: 1rem; color: var(--text-primary); }
.support-card p { color: var(--text-secondary); margin-bottom: 1.5rem; }
.topic-list { display: flex; flex-direction: column; gap: 1.5rem; }
.topic-item { background: white; padding: 1.5rem; border-radius: 12px; box-shadow: var(--shadow); }
.topic-item h3 { font-size: 1.3rem; margin-bottom: 0.5rem; color: var(--text-primary); }
.topic-item p { color: var(--text-secondary); }
.contact-info { background: white; padding: 2rem; border-radius: 12px; box-shadow: var(--shadow); }
.contact-item { margin-bottom: 1.5rem; }
.contact-item strong { display: block; margin-bottom: 0.5rem; color: var(--text-primary); }
.contact-item a { color: var(--primary-color); text-decoration: none; }
.contact-item a:hover { text-decoration: underline; }
.steps-list { background: white; padding: 2rem; border-radius: 12px; box-shadow: var(--shadow); margin: 1.5rem 0; }
.steps-list li { margin-bottom: 1rem; line-height: 1.8; }
.note { background: var(--bg-secondary); padding: 1rem; border-radius: 8px; margin-top: 1rem; font-size: 0.95rem; }

/* FAQ */
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item { background: white; border-radius: 12px; margin-bottom: 1rem; box-shadow: var(--shadow); overflow: hidden; }
.faq-question { width: 100%; padding: 1.5rem; background: none; border: none; text-align: left; font-size: 1.1rem; font-weight: 600; color: var(--text-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.faq-question:hover { background: var(--bg-secondary); }
.faq-icon { font-size: 1.5rem; color: var(--primary-color); transition: var(--transition); }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.active .faq-answer { max-height: 1000px; }
.faq-answer p, .faq-answer ul, .faq-answer ol { padding: 0 1.5rem 1.5rem; color: var(--text-secondary); line-height: 1.8; }
.faq-answer ul, .faq-answer ol { margin-left: 2rem; margin-top: 0.5rem; }
.faq-answer a { color: var(--primary-color); text-decoration: none; }
.faq-answer a:hover { text-decoration: underline; }

/* Legal */
.legal-content { max-width: 900px; margin: 0 auto; background: white; padding: 3rem; border-radius: 16px; box-shadow: var(--shadow); line-height: 1.8; }
.legal-content h2 { font-size: 2rem; margin-top: 2.5rem; margin-bottom: 1rem; color: var(--text-primary); }
.legal-content h3 { font-size: 1.5rem; margin-top: 2rem; margin-bottom: 1rem; color: var(--text-primary); }
.legal-content p { margin-bottom: 1.5rem; color: var(--text-secondary); }
.legal-content ul, .legal-content ol { margin-left: 2rem; margin-bottom: 1.5rem; color: var(--text-secondary); }
.legal-content li { margin-bottom: 0.5rem; }
.legal-content a { color: var(--primary-color); text-decoration: none; }
.legal-content a:hover { text-decoration: underline; }
.legal-content strong { color: var(--text-primary); }

/* Footer */
.footer { background: var(--bg-secondary); padding: 3rem 0 1.5rem; margin-top: 5rem; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.footer-section h3, .footer-section h4 { margin-bottom: 1rem; color: var(--text-primary); }
.footer-section p { color: var(--text-secondary); margin-bottom: 0.5rem; }
.footer-section ul { list-style: none; }
.footer-section ul li { margin-bottom: 0.5rem; }
.footer-section a { color: var(--text-secondary); text-decoration: none; transition: var(--transition); }
.footer-section a:hover { color: var(--primary-color); }
.footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid var(--border-color); color: var(--text-secondary); }

/* Responsive */
@media (max-width: 768px) {
    .nav-menu { position: fixed; left: -100%; top: 70px; flex-direction: column; background: white; width: 100%; text-align: center; transition: 0.3s; box-shadow: var(--shadow); padding: 2rem 0; gap: 1rem; }
    .nav-menu.active { left: 0; }
    .nav-toggle { display: flex; }
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-title { font-size: 2.5rem; }
    .hero-image { display: flex; min-height: 300px; }
    .dashboard-screenshot { max-width: 300px; }
    .iphone-screenshot { max-width: 150px; margin-right: -30px; }
    .features-grid { grid-template-columns: 1fr; }
    .support-cards { grid-template-columns: 1fr; }
    .legal-content { padding: 2rem 1.5rem; }
    .page-header h1 { font-size: 2rem; }
    .section-title { font-size: 2rem; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.2rem; }
    .hero-buttons { flex-direction: column; }
    .btn { width: 100%; }
    .dashboard-screenshot { max-width: 250px; }
    .iphone-screenshot { max-width: 120px; margin-right: -20px; }
}