:root {
    --primary-color: #007AFF;
    --accent-green: #34C759;
    --text-color: #1c1c1e;
    --text-secondary: #8e8e93;
    --bg-color: #ffffff;
    --bg-secondary: #f5f5f7;
    --border-color: #e5e5e5;
    --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);
    --max-width: 1080px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: saturate(180%) blur(20px);
    background-color: rgba(255, 255, 255, 0.8);
}

.nav {
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
}

.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;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 6rem 0 5rem;
    background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: #0051d5;
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(0, 122, 255, 0.1);
}

/* App Store Badge */
.app-store-badge {
    display: inline-block;
    transition: transform 0.2s;
}

.app-store-badge:hover {
    transform: scale(1.05);
}

.app-store-badge svg {
    height: 48px;
    width: auto;
}

/* Features Section */
.features {
    padding: 5rem 0;
}

.features h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: -0.02em;
}

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

.feature-item {
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: all 0.2s;
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.how-it-works h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: -0.02em;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.step-item p {
    color: var(--text-secondary);
}

/* Privacy Section */
.privacy-section {
    padding: 5rem 0;
}

.privacy-highlight {
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.1), rgba(52, 199, 89, 0.05));
    border: 2px solid var(--accent-green);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.privacy-highlight h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.privacy-highlight p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.privacy-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.privacy-feature {
    text-align: center;
}

.privacy-feature-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.privacy-feature-text {
    color: var(--text-secondary);
    font-weight: 500;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.faq h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    letter-spacing: -0.02em;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-color);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: 5rem 0;
    text-align: center;
}

.pricing h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.pricing-subtitle {
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.pricing-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 3rem;
    max-width: 500px;
    margin: 0 auto;
    border: 2px solid var(--border-color);
}

.pricing-price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.pricing-period {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.pricing-features {
    text-align: left;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.pricing-features li::before {
    content: "✓";
    color: var(--accent-green);
    font-weight: 700;
    font-size: 1.25rem;
}

/* Support Section */
.support-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
    text-align: center;
}

.support-section h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.support-email {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.support-email a {
    color: var(--primary-color);
    text-decoration: none;
}

.support-email a:hover {
    text-decoration: underline;
}

/* Legal Links Section */
.legal-links {
    padding: 4rem 0;
}

.legal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.legal-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.2s;
    border: 1px solid var(--border-color);
}

.legal-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.legal-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.legal-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.footer-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-info a:hover {
    text-decoration: underline;
}

/* Privacy Policy Page Specific */
.privacy-page {
    padding: 4rem 0;
}

.privacy-page h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.privacy-updated {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 3rem;
}

.privacy-page h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.privacy-page h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.privacy-page p {
    margin-bottom: 1rem;
    line-height: 1.7;
    color: var(--text-color);
}

.privacy-page ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.privacy-page li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.highlight-box {
    background: rgba(0, 122, 255, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.no-data-box {
    background: rgba(52, 199, 89, 0.1);
    border-left: 4px solid var(--accent-green);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.contact-box {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    margin-top: 2rem;
}

/* Support Page Specific */
.support-page {
    padding: 4rem 0;
}

.support-page h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.support-page h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.setup-steps {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.setup-step {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.setup-step:last-child {
    margin-bottom: 0;
}

.setup-step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.setup-step-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.setup-step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.system-requirements {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.system-requirements ul {
    list-style: none;
    padding: 0;
}

.system-requirements li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.system-requirements li:last-child {
    border-bottom: none;
}

.system-requirements li::before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.5rem;
    line-height: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        gap: 1rem;
    }

    .nav-menu {
        width: 100%;
        order: 3;
        gap: 1rem;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .features h2,
    .how-it-works h2,
    .faq h2,
    .pricing h2 {
        font-size: 1.75rem;
    }

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

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

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary,
    .btn-secondary {
        justify-content: center;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0 3rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .features,
    .how-it-works,
    .privacy-section,
    .faq,
    .pricing,
    .support-section,
    .legal-links {
        padding: 3rem 0;
    }

    .feature-item,
    .pricing-card {
        padding: 1.5rem;
    }

    .privacy-highlight {
        padding: 2rem 1.5rem;
    }
}