/* ===== CSS RESET & NORMALIZE ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

button {
    font: inherit;
    border: none;
    background: none;
    cursor: pointer;
}

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Brand Colors */
    --primary-color: rgb(133, 77, 255);
    --primary-dark: rgb(108, 62, 204);
    --primary-light: rgb(158, 102, 255);
    
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    
    /* Spacing Scale */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    --spacing-4xl: 5rem;     /* 80px */
    
    /* Container Sizes */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    
    /* Typography */
    --font-family: system-ui, -apple-system, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ===== DARK MODE ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --text-muted: #999999;
        --border-color: #404040;
        --shadow-light: rgba(0, 0, 0, 0.3);
        --shadow-medium: rgba(0, 0, 0, 0.4);
    }
}

/* ===== BASE STYLES ===== */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

/* ===== CONTAINER ===== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* ===== SECTION SPACING ===== */
section {
    padding: var(--spacing-3xl) 0;
}

@media (min-width: 768px) {
    section {
        padding: var(--spacing-4xl) 0;
    }
}

/* ===== BUTTONS ===== */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-semibold);
    color: white;
    background-color: var(--primary-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    min-height: 44px; /* Touch target size */
    margin: var(--spacing-xs);
}

.download-btn:hover:not(.disabled) {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.download-btn:focus:not(.disabled) {
    color: white;
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.download-btn:active:not(.disabled) {
    color: white;
    transform: translateY(0);
}

/* Disabled button state */
.download-btn.disabled {
    background-color: var(--text-muted);
    color: var(--bg-primary);
    cursor: not-allowed;
    pointer-events: none;
}

@media (prefers-color-scheme: dark) {
    .download-btn.disabled {
        background-color: #555555;
        color: #cccccc;
    }
}

/* Button text hierarchy */
.download-btn.disabled {
    flex-direction: column;
    text-align: center;
    align-items: center;
    justify-content: center;
}

.btn-main-text {
    display: block;
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    width: 100%;
}

.btn-subtitle {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-normal);
    opacity: 0.8;
    margin-top: var(--spacing-xs);
    line-height: var(--leading-tight);
    width: 100%;
}

/* ===== LINKS ===== */
a {
    color: var(--primary-color);
    transition: color var(--transition-fast);
    text-decoration: none;
}

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

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: var(--spacing-4xl) 0;
}

.hero .container {
    display: grid;
    gap: var(--spacing-2xl);
    align-items: center;
}

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

.hero-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}


@media (min-width: 768px) {
    .hero .container {
        max-width: 800px;
        margin: 0 auto;
        gap: var(--spacing-3xl);
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .download-buttons {
        align-items: center;
    }
}

@media (min-width: 1024px) {
    .download-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

/* ===== FEATURES SECTION ===== */
.features {
    background-color: var(--bg-secondary);
}

.features-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

.feature-card h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== TEAM SECTION ===== */
.team {
    text-align: center;
}

.team h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.team-description {
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl) auto;
    font-size: var(--font-size-lg);
}

.team-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.team-member {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg) auto;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.team-member h3 {
    margin-bottom: var(--spacing-sm);
}

.team-role {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.team-link {
    font-weight: var(--font-semibold);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-md);
    display: inline-block;
    transition: all var(--transition-normal);
}

.team-link:hover {
    background-color: var(--primary-color);
    color: white;
}

@media (min-width: 768px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .team-avatar {
        width: 100px;
        height: 100px;
    }
}

/* ===== CONTACT SECTION ===== */
.contact {
    background-color: var(--bg-secondary);
    text-align: center;
}

.contact h2 {
    margin-bottom: var(--spacing-lg);
}

.contact p {
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl) auto;
    font-size: var(--font-size-lg);
}

.contact-methods {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 500px;
    margin: 0 auto;
}

.contact-link {
    display: block;
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    text-decoration: none;
    border: 2px solid transparent;
}

.contact-link:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.contact-method {
    display: block;
    font-weight: var(--font-semibold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    display: block;
    color: var(--text-secondary);
}

/* ===== FAQ SECTION ===== */
.faq {
    text-align: center;
}

.faq h2 {
    margin-bottom: var(--spacing-2xl);
}

.faq-item {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    background-color: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.faq-item p {
    margin-bottom: 0;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

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

.footer-nav a {
    color: var(--bg-primary);
    font-weight: var(--font-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.footer-nav a:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.footer-nav a:focus {
    outline: 2px solid var(--bg-primary);
    outline-offset: 2px;
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (max-width: 767px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    h2 {
        font-size: var(--font-size-2xl);
    }
    
    .team-avatar {
        width: 100px;
        height: 100px;
    }
}

/* Legal Pages */
.legal-page {
    padding: var(--spacing-xl) 0 var(--spacing-xxl) 0;
    min-height: calc(100vh - 200px);
}

.legal-header {
    margin-bottom: var(--spacing-xl);
}

.back-link {
    display: inline-block;
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.back-link:hover,
.back-link:focus {
    color: var(--primary-hover);
}

.legal-header h1 {
    color: var(--text-color);
    font-size: 2.5rem;
    margin-bottom: 0;
}

.legal-content {
    max-width: 800px;
    line-height: 1.7;
}

.legal-content h1,
.legal-content h2,
.legal-content h3,
.legal-content h4,
.legal-content h5,
.legal-content h6 {
    color: var(--text-color);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.legal-content h1 {
    font-size: 2rem;
}

.legal-content h2 {
    font-size: 1.5rem;
}

.legal-content h3 {
    font-size: 1.25rem;
}

.legal-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.legal-content ul,
.legal-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.legal-content li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.legal-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

.legal-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
}

.legal-content th,
.legal-content td {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    text-align: left;
}

.legal-content th {
    background-color: var(--surface-color);
    font-weight: 600;
    color: var(--text-color);
}

.legal-content td {
    color: var(--text-secondary);
}

.legal-content em {
    color: var(--text-secondary);
    font-style: italic;
}

.legal-content strong {
    color: var(--text-color);
    font-weight: 600;
}

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

/* Focus visible for better keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: var(--text-primary);
        --shadow-light: rgba(0, 0, 0, 0.5);
        --shadow-medium: rgba(0, 0, 0, 0.7);
    }
}

/* Large desktop styles */
@media (min-width: 1200px) {
    .hero {
        padding: 5rem 0;
    }
    
    .features,
    .team,
    .contact,
    .faq {
        padding: 5rem 0;
    }
    
    .legal-page {
        padding: 3rem 0 5rem 0;
    }
    
    .legal-header h1 {
        font-size: 3rem;
    }
}