/* CSS Variables */
:root {
    --color-primary: #1e40af;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-accent: #0ea5e9;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
    --radius-lg: 1rem;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav {
    display: flex;
    gap: 1.5rem;
}

.nav a {
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-wrap: balance;
}

.hero-subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.hero-disclaimer {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--color-surface);
    color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-background);
    color: var(--color-primary-dark);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--color-primary-dark);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Trust Notice */
.trust-notice {
    padding: 2rem 0;
    background: var(--color-surface);
}

.notice-box {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
}

.notice-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 0.125rem;
}

.notice-box p {
    font-size: 1rem;
    color: var(--color-text);
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--color-surface);
}

.section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
    text-align: center;
    text-wrap: balance;
}

.section-intro {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.content-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.content-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: #eff6ff;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

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

.content-card p {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    margin: 2rem 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-background);
    font-size: 1rem;
}

.data-table th,
.data-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background: var(--color-primary);
    color: white;
    font-weight: 600;
    white-space: nowrap;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:nth-child(even) {
    background: var(--color-surface);
}

.data-table tr:hover {
    background: #eff6ff;
}

.table-disclaimer {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-align: center;
    font-style: italic;
    margin-top: 1rem;
}

/* Info Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.info-card {
    background: var(--color-surface);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.info-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.info-card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.info-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.info-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* Steps */
.steps-container {
    max-width: 800px;
    margin: 2.5rem auto 0;
}

.step {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.step:last-child {
    border-bottom: none;
}

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

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

.step-content p {
    color: var(--color-text-muted);
}

.steps-cta {
    text-align: center;
    margin-top: 2.5rem;
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 2.5rem auto 0;
}

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

.faq-question {
    padding: 1.25rem 1.5rem;
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text);
    transition: background 0.2s ease;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-primary);
    transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
    content: '−';
}

.faq-question:hover {
    background: var(--color-background);
}

.faq-answer {
    padding: 0 1.5rem 1.25rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.faq-answer a {
    color: var(--color-primary);
}

/* Privacy Box */
.privacy-box {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: 0 auto;
}

.privacy-icon {
    width: 48px;
    height: 48px;
    background: #dcfce7;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.privacy-icon svg {
    width: 24px;
    height: 24px;
    color: #16a34a;
}

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

.privacy-content p {
    color: var(--color-text-muted);
}

/* Footer */
.footer {
    background: #1e293b;
    color: #cbd5e1;
    padding: 3rem 0;
}

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

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

.footer-links a {
    color: #cbd5e1;
    font-weight: 500;
}

.footer-links a:hover {
    color: white;
}

.footer-disclaimer {
    font-size: 0.875rem;
    max-width: 700px;
    margin: 0 auto 1rem;
    line-height: 1.7;
    opacity: 0.8;
}

.footer-copyright {
    font-size: 0.8125rem;
    opacity: 0.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .header .container {
        flex-direction: column;
        text-align: center;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .section h2 {
        font-size: 1.5rem;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }
    
    /* Mobile Table */
    .data-table thead {
        display: none;
    }
    
    .data-table tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
        background: var(--color-surface);
    }
    
    .data-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--color-border);
    }
    
    .data-table td:last-child {
        border-bottom: none;
    }
    
    .data-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--color-text);
        margin-right: 1rem;
    }
    
    .privacy-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .notice-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .content-card,
    .info-card {
        padding: 1.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus states for keyboard navigation */
a:focus,
button:focus,
summary:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000;
    }
    
    .content-card,
    .info-card,
    .faq-item {
        border-width: 2px;
    }
}