/* ===================================
   CSS RESET & BASE STYLES
   =================================== */

/* Modern CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #000;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .container {
        padding: 0 2rem;
    }
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 1000;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
    font-size: 0.875rem;
    line-height: 1.4;
    min-height: 44px; /* Accessibility: minimum touch target */
}

.btn--primary {
    background-color: #fff;
    color: #000;
    border-color: #fff;
}

.btn--primary:hover,
.btn--primary:focus {
    background-color: transparent;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.btn--secondary {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.btn--secondary:hover,
.btn--secondary:focus {
    background-color: #fff;
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.btn--large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease;
}

.nav {
    padding: 1rem 0;
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 39px;
    width: auto;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    min-height: 44px;
    min-width: 44px;
}

.nav-toggle-line {
    width: 24px;
    height: 2px;
    background-color: #fff;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.75rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #fff;
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link--active::after {
    width: 100%;
}

.nav-link:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        gap: 1rem;
    }
    
    .nav-menu.nav-menu--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        rgba(0, 0, 0, 0.7) 0%,
        rgba(0, 0, 0, 0.3) 100%
    );
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 2rem;
    letter-spacing: 1px;
}

.hero-title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-title-line:nth-child(3) {
    animation-delay: 0.4s;
}

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.125rem);
    line-height: 1.6;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.6s forwards;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   FEATURES SECTION
   =================================== */

.features {
    padding: 8rem 0;
    background-color: #fff;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.feature-description {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
}

/* ===================================
   CTA SECTION
   =================================== */

.cta {
    padding: 8rem 0;
    background: linear-gradient(135deg,rgba(34, 34, 36, 0.9) 0%, rgba(18, 17, 19, 0.9) 100%);
    color: #fff;
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background-color: #000;
    color: #fff;
    padding: 3rem 0 2rem;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.footer-brand img {
    height: 43px;
    width: auto;
}

.footer-text {
    font-size: 0.875rem;
    color: #ccc;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ===================================
   ACCESSIBILITY & FOCUS STYLES
   =================================== */

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn--primary {
        border-width: 3px;
    }
    
    .nav-link::after {
        height: 3px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-video {
        display: none;
    }
    
    .hero-background {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }
}

/* Focus visible for better keyboard navigation */
.btn:focus-visible,
.nav-link:focus-visible,
.nav-toggle:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
}