/* eCripto Website Styles */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-success: #059669;
    --color-warning: #d97706;
    --color-error: #dc2626;

    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #e2e8f0;
    --color-bg-dark: #0f172a;

    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-light: #ffffff;

    --color-border: #e2e8f0;
    --color-border-focus: #2563eb;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    --border-radius: 6px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 8px;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1000;
    font-weight: 600;
}

.skip-link:focus {
    top: 8px;
}

/* Header */
header {
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 700;
}

.logo .tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

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

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

.nav-app-btn {
    background: var(--color-primary) !important;
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    transition: background 0.2s, transform 0.2s !important;
}

.nav-app-btn:hover,
.nav-app-btn:focus {
    background: var(--color-primary-dark) !important;
    color: white !important;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
    padding: var(--spacing-3xl) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3xl);
    min-height: 60vh;
}

.hero-content {
    max-width: 600px;
}

.hero-content h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.crypto-icon-display {
    display: flex;
    gap: var(--spacing-lg);
}

.crypto-icon-display .icon {
    font-size: 64px;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
}

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

.btn-primary:hover,
.btn-primary:focus {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* Sections */
section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

section h2 {
    font-size: var(--font-size-2xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

/* Features Section */
.features {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.feature-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon {
    font-size: 48px;
    display: block;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

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

/* Accessibility Section */
.accessibility {
    background: var(--color-bg-primary);
}

.accessibility-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.a11y-feature {
    text-align: center;
    padding: var(--spacing-xl);
}

.a11y-icon {
    font-size: 48px;
    display: block;
    margin-bottom: var(--spacing-md);
}

.a11y-feature h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.a11y-feature p {
    color: var(--color-text-secondary);
}

/* Downloads Section */
.downloads {
    background: var(--color-bg-secondary);
}

.version-info {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text-secondary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.download-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
}

.platform-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.platform-icon {
    font-size: 36px;
}

.platform-header h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
}

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

.download-btn.primary:hover,
.download-btn.primary:focus {
    background: var(--color-primary-dark);
}

.download-btn.secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.download-btn.secondary:hover,
.download-btn.secondary:focus {
    background: var(--color-border);
}

.file-size {
    margin-left: auto;
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.system-req {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
}

/* Support Section */
.support {
    background: var(--color-bg-primary);
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.support-card {
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.support-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.support-card p {
    color: var(--color-text-secondary);
}

.support-card a {
    color: var(--color-primary);
}

/* Footer */
footer {
    background: var(--color-bg-dark);
    color: var(--color-text-light);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-brand h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--color-text-light);
}

.copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .hero-content h2 {
        font-size: var(--font-size-2xl);
    }

    .hero-actions {
        justify-content: center;
    }

    .crypto-icon-display .icon {
        width: 70px;
        height: 70px;
        font-size: 36px;
    }

    .nav-links {
        display: none;
    }

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

/* Focus styles */
a:focus,
button:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #0000ee;
        --color-text-primary: #000000;
        --color-bg-primary: #ffffff;
        --color-border: #000000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}