:root {
    --primary: #0056B3;
    --primary-dark: #004494;
    --primary-light: #4dabf5;
    --secondary: #f5f5f7;
    --text-main: #1d1d1f;
    --text-light: #86868b;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #0056B3 0%, #00c6ff 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    position: fixed;
    width: 100%;
    z-index: 1000;
    top: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}

.logo img {
    height: 40px;
    width: 40px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}

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

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(circle at 50% 0%, #f5f9ff 0%, #ffffff 70%);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 40px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 16px 32px;
    background: var(--primary);
    color: white;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: var(--shadow-md);
    transform: translateY(0);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 86, 179, 0.3);
}

/* Content Sections */
.section {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-card {
    padding: 40px;
    background: var(--secondary);
    border-radius: 24px;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-light);
}

/* Content Page (Privacy, Delete) */
.content-page {
    padding: 140px 0 100px;
    max-width: 800px;
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    text-align: center;
}

.content-page h2 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
    color: var(--text-main);
}

.content-page p,
.content-page ul {
    margin-bottom: 16px;
    color: var(--text-light);
}

.content-page ul {
    padding-left: 24px;
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e1e1e1;
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

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

.delete-warning {
    background: #fff5f5;
    border: 1px solid #fed7d7;
    color: #c53030;
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 30px;
}

.contact-card {
    background: var(--secondary);
    padding: 24px;
    border-radius: var(--radius);
    margin: 20px 0;
    line-height: 1.6;
}

.contact-card h3 {
    margin-bottom: 12px;
    color: var(--primary);
}

/* Footer */
footer {
    background: #fbfbfd;
    padding: 60px 0;
    margin-top: auto;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

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

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }
}