/* ============================================
   Endless Engine Brand Styles
   Based on Brand Guide
   ============================================ */

:root {
    /* Brand Colors - Infinite Motion */
    --color-endless-blue: #3399FF;
    --color-cyan-pulse: #3DD5F3;
    --color-electric-white: #F7FAFF;
    --color-midnight-graphite: #1E1E2A;
    
    /* Typography */
    --font-logo: 'Sora', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Exo 2', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-smooth: 400ms ease-in-out;
    --transition-fast: 200ms ease-in-out;
    
    /* Layout */
    --navbar-height: 80px;
    --scroll-threshold: 100px;
    --navbar-bg-opacity: 0.95;
    --navbar-bg-opacity-scrolled: 0.98;
    
    /* Utilities */
    --center-transform: translate(-50%, -50%);
    --fade-in-distance: 30px;
    --parallax-speed: 0.5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-midnight-graphite);
    background-color: var(--color-electric-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(247, 250, 255, var(--navbar-bg-opacity));
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(247, 250, 255, var(--navbar-bg-opacity-scrolled));
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-symbol-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-symbol {
    width: 50px;
    height: 50px;
    display: block;
    transition: var(--transition-smooth);
}

.logo-symbol path {
    fill: var(--color-endless-blue);
    transition: var(--transition-smooth);
}

.logo:hover .logo-symbol path {
    fill: var(--color-cyan-pulse);
}

.logo:hover .logo-symbol {
    transform: scale(1.05);
}

/* Footer logo - white/cyan for dark background */
.footer-logo-svg path {
    fill: var(--color-cyan-pulse);
}

.footer-logo:hover .footer-logo-svg path {
    fill: white;
}

.logo-text {
    font-family: var(--font-logo);
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    color: var(--color-midnight-graphite);
    text-transform: uppercase;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--color-midnight-graphite);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-endless-blue);
    transition: var(--transition-fast);
}

.nav-menu a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-midnight-graphite);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--navbar-height);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
}

.orbit-ring {
    position: absolute;
    border: 2px solid var(--color-cyan-pulse);
    border-radius: 50%;
    opacity: 0.3;
    top: 50%;
    left: 50%;
    transform: var(--center-transform);
}

.ring-1 {
    width: 300px;
    height: 300px;
    animation: orbit 20s linear infinite;
}

.ring-2 {
    width: 450px;
    height: 450px;
    animation: orbit 25s linear infinite reverse;
}

.ring-3 {
    width: 600px;
    height: 600px;
    animation: orbit 30s linear infinite;
}

.energy-sphere {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: var(--center-transform);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, var(--color-cyan-pulse), var(--color-endless-blue));
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 40px rgba(61, 213, 243, 0.5);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

@media (min-width: 768px) {
    .hero .container {
        margin-left: 0;
        padding-left: var(--spacing-lg);
    }
    
    .energy-sphere,
    .orbit-ring {
        left: 75%;
        top: 52%;
        transform: var(--center-transform);
    }
    
    .hero-content {
        text-align: left;
        max-width: 600px;
        margin-right: auto;
        margin-left: 12.5%;
        padding-left: 0;
    }
    
    .hero-cta {
        justify-content: flex-start;
    }
    
    .hero-title .title-line {
        display: inline;
    }
    
    .hero-title .title-line:first-child {
        margin-right: 0.5em;
    }
}

.hero-title {
    font-family: var(--font-logo);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--color-midnight-graphite);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(var(--fade-in-distance, 30px));
    animation: fadeInUp 0.8s ease-out forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
    background: linear-gradient(135deg, var(--color-endless-blue), var(--color-cyan-pulse));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-midnight-graphite);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-lg);
    opacity: 0.8;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-tagline {
    font-family: var(--font-accent);
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    font-weight: 500;
    color: var(--color-endless-blue);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.btn {
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition-smooth);
    display: inline-block;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(to right, var(--color-endless-blue), var(--color-cyan-pulse));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    border: none;
}

.btn-primary:hover,
.btn-secondary:hover {
    transform: translateY(-2px);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-endless-blue);
    border-color: var(--color-endless-blue);
}

.btn-secondary:hover {
    background: var(--color-endless-blue);
    color: white;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    cursor: pointer;
    text-decoration: none;
    z-index: 10;
}

.scroll-arrow {
    width: 0;
    height: 0;
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    border-top: 18px solid var(--color-endless-blue);
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(0, -10px);
    }
}

/* ============================================
   Services Section
   ============================================ */

.services {
    padding: var(--spacing-xl) 0;
    background: white;
}

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

.section-title {
    font-family: var(--font-logo);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-midnight-graphite);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--color-midnight-graphite);
    opacity: 0.7;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    padding: var(--spacing-md);
    background: var(--color-electric-white);
    border-radius: 12px;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-cyan-pulse);
    box-shadow: 0 10px 30px rgba(61, 213, 243, 0.2);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-endless-blue);
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
    transform: rotate(5deg) scale(1.1);
    color: var(--color-cyan-pulse);
}

.service-card h3 {
    font-family: var(--font-logo);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-midnight-graphite);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-midnight-graphite);
    opacity: 0.8;
    line-height: 1.7;
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-electric-white) 0%, white 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-lead {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-endless-blue);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: var(--color-midnight-graphite);
    opacity: 0.8;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-logo);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-endless-blue);
    margin-bottom: var(--spacing-xs);
    opacity: var(--stat-opacity, 0);
    transform: scale(var(--stat-scale, 0.8)) translateY(var(--stat-translate-y, 10px));
    transition: opacity 0.1s ease-out, transform 0.1s ease-out;
}

.stat-number.stat-animating {
    opacity: var(--stat-opacity, 0);
    transform: scale(var(--stat-scale, 0.8)) translateY(var(--stat-translate-y, 10px));
    transition: none;
}

.stat-number.stat-complete {
    opacity: 1;
    transform: scale(1) translateY(0);
    transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-midnight-graphite);
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.motion-visual {
    position: relative;
    width: 300px;
    height: 300px;
}

.motion-circle {
    position: absolute;
    border: 2px solid var(--color-cyan-pulse);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: var(--center-transform);
    opacity: 0.4;
}

.circle-1 {
    width: 100px;
    height: 100px;
    animation: orbit 15s linear infinite;
}

.circle-2 {
    width: 150px;
    height: 150px;
    animation: orbit 20s linear infinite reverse;
}

.circle-3 {
    width: 200px;
    height: 200px;
    animation: orbit 25s linear infinite;
}

.motion-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: var(--center-transform);
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--color-cyan-pulse), var(--color-endless-blue));
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}


/* ============================================
   Contact Section
   ============================================ */

.contact {
    padding: var(--spacing-xl) 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-item h3 {
    font-family: var(--font-logo);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-midnight-graphite);
    margin-bottom: var(--spacing-sm);
}

.info-item h4 {
    font-family: var(--font-logo);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-endless-blue);
    margin-bottom: var(--spacing-xs);
}

.info-item p {
    color: var(--color-midnight-graphite);
    opacity: 0.8;
    line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--spacing-lg) 0;
    background: var(--color-midnight-graphite);
    color: white;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-text {
    color: white;
}

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

.footer-links a {
    color: white;
    text-decoration: none;
    transition: var(--transition-fast);
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-cyan-pulse);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
    font-size: 0.9rem;
}

/* ============================================
   Animations
   ============================================ */

@keyframes pulse {
    0%, 100% {
        transform: var(--center-transform) scale(1);
        opacity: 1;
    }
    50% {
        transform: var(--center-transform) scale(1.1);
        opacity: 0.8;
    }
}

@keyframes orbit {
    from {
        transform: var(--center-transform) rotate(0deg);
    }
    to {
        transform: var(--center-transform) rotate(360deg);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(var(--fade-in-distance, 30px));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .about-visual {
        display: none;
    }
    
    .hero {
        padding-top: 60px;
    }
    
    .services,
    .about,
    .contact,
    .footer {
        padding: var(--spacing-lg) 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-electric-white);
        flex-direction: column;
        padding: var(--spacing-md);
        transform: translateX(-100%);
        transition: var(--transition-smooth);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}