/*
========================================
RITIX LLC - STYLES
========================================

COLOR PALETTE:
- Background (near-black): #0a0a0f
- Surface (dark navy): #12121a
- Surface elevated: #1a1a24
- Border: #2a2a3a
- Text primary: #f0f0f5
- Text secondary: #a0a0b0
- Accent blue: #4a7cff
- Accent blue hover: #6090ff
- Success: #4ade80
- Error: #f87171

========================================
*/

/* CSS Custom Properties */
:root {
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-surface-elevated: #1a1a24;
    --color-border: #2a2a3a;
    --color-text-primary: #f0f0f5;
    --color-text-secondary: #a0a0b0;
    --color-accent: #4a7cff;
    --color-accent-hover: #6090ff;
    --color-success: #4ade80;
    --color-error: #f87171;

    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    --header-height: 64px;
    --max-width: 1200px;
    --max-width-narrow: 800px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-stack);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

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

.container-narrow {
    max-width: var(--max-width-narrow);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal);
}

.header.scrolled {
    background-color: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo:hover,
.logo:focus {
    color: var(--color-accent);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 101;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Navigation */
.nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.nav.open {
    transform: translateX(0);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 1.125rem;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-accent);
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }

    .nav {
        position: static;
        transform: none;
        background: transparent;
        padding: 0;
        overflow: visible;
    }

    .nav-list {
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
}

/* Sections */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.section-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
}

.hero-tagline {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-intro {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-secondary);
}

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

@media (min-width: 480px) {
    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    min-width: 160px;
}

.btn:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

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

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

.btn-secondary:hover {
    border-color: var(--color-text-secondary);
    background-color: var(--color-surface);
}

/* Apps Section */
#apps .section-title,
#apps .section-subtitle {
    text-align: center;
}

/* Apps Grid */
.apps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

@media (min-width: 640px) {
    .apps-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 350px));
    }
}

/* App Card */
.app-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    position: relative;
}

.app-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.app-card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-elevated);
    border-radius: var(--radius-lg);
    color: var(--color-accent);
}

.app-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-surface-elevated);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.app-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.app-card-description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* Apps Notify */
.apps-notify {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.apps-notify a {
    color: var(--color-accent);
    text-decoration: none;
}

.apps-notify a:hover,
.apps-notify a:focus {
    text-decoration: underline;
}

/* About Content */
.about-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Contact Section */
.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 480px) {
    .contact-info {
        grid-template-columns: repeat(2, 1fr);
    }
}

.contact-item {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.contact-item h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.contact-item a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover,
.contact-item a:focus {
    text-decoration: underline;
}

/* Legal Sections */
.section-legal {
    background-color: var(--color-surface);
}

.legal-date {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.legal-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

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

.legal-content ul {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
}

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

.legal-content a {
    color: var(--color-accent);
    text-decoration: none;
}

.legal-content a:hover,
.legal-content a:focus {
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

@media (min-width: 640px) {
    .footer .container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.footer-nav {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.footer-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-nav a:hover,
.footer-nav a:focus {
    color: var(--color-accent);
}

.footer-divider {
    color: var(--color-border);
}

/* Focus Visible Styles for Keyboard Navigation */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Selection Styles */
::selection {
    background-color: var(--color-accent);
    color: var(--color-text-primary);
}