/* Dark Theme Styles for American LFP Website */
:root {
    /* Dark Theme Color Palette */
    --primary-bg: #0F172A; /* Deep navy blue */
    --secondary-bg: #1E293B; /* Rich dark gray */
    --card-bg: #293548; /* Slightly lighter for cards */
    --text-primary: rgba(255, 255, 255, 0.9); /* 90% white */
    --text-secondary: rgba(255, 255, 255, 0.7); /* 70% white */
    --accent-primary: #38BDF8; /* Electric blue */
    --accent-secondary: #4ADE80; /* Energy green */
    --accent-tertiary: #8B5CF6; /* Purple accent */
    --dark-shadow: rgba(0, 0, 0, 0.3);
    --light-shadow: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --glow-primary: 0 0 15px rgba(56, 189, 248, 0.5);
    --glow-secondary: 0 0 15px rgba(74, 222, 128, 0.5);
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title h2 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
}

.section-title h2:after {
    content: '';
    position: absolute;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 3px;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(15, 23, 42, 0.9); /* Semi-transparent primary-bg */
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo h1 {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 700;
    margin-left: 10px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease, text-shadow 0.3s ease;
    position: relative;
    padding: 5px 0;
}

nav ul li a:hover {
    color: var(--accent-primary);
    text-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}

/* Hero Section */
#hero {
    height: 100vh;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.9)), url('images/hero-background.svg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-primary);
    padding-top: 80px;
    position: relative;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(56, 189, 248, 0.1) 0%, rgba(15, 23, 42, 0) 70%);
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.hero-content h2 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 40px;
    color: var(--text-secondary);
}

.cta-button {
    display: inline-block;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    color: var(--primary-bg);
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: var(--glow-primary);
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: var(--glow-secondary);
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
    z-index: -1;
    transition: opacity 0.3s ease;
    opacity: 0;
}

.cta-button:hover::before {
    opacity: 1;
}

/* Benefits Section */
#benefits {
    background-color: var(--secondary-bg);
    position: relative;
}

#benefits::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(74, 222, 128, 0.05) 0%, rgba(15, 23, 42, 0) 70%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.benefit-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(74, 222, 128, 0.1) 100%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.benefit-card:hover::before {
    opacity: 1;
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(56, 189, 248, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.benefit-card:hover .benefit-icon {
    background-color: rgba(56, 189, 248, 0.2);
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.benefit-icon img {
    width: 40px;
    height: 40px;
    filter: invert(1);
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

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

/* About Section */
#about {
    background: linear-gradient(135deg, var(--primary-bg), var(--secondary-bg));
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

#about::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(56, 189, 248, 0.03) 0%, rgba(15, 23, 42, 0) 50%);
    z-index: 0;
    animation: rotate 60s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.about-text p {
    font-size: 1.2rem;
    line-height: 1.8;
}

/* Technology Section */
#technology {
    background-color: var(--secondary-bg);
    position: relative;
}

#technology::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.05) 0%, rgba(15, 23, 42, 0) 70%);
}

.technology-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.technology-text {
    text-align: center;
    margin-bottom: 50px;
}

.technology-text p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.technology-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-bg), var(--card-bg));
    color: var(--text-primary);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.stat-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Applications Section */
#applications {
    background-color: var(--primary-bg);
    position: relative;
}

#applications::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top center, rgba(56, 189, 248, 0.05) 0%, rgba(15, 23, 42, 0) 70%);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    position: relative;
    z-index: 1;
}

.application-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.application-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.application-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.application-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.7));
}

.application-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.application-card:hover .application-image img {
    transform: scale(1.1);
}

.application-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    padding: 20px 20px 10px;
    position: relative;
}

.application-card h3::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    bottom: 0;
    left: 20px;
    border-radius: 3px;
}

.application-card p {
    padding: 10px 20px 20px;
    color: var(--text-secondary);
}

/* Sustainability Section */
#sustainability {
    background: linear-gradient(rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.9)), url('images/sustainability-background.svg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-primary);
    position: relative;
}

#sustainability::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(74, 222, 128, 0.1) 0%, rgba(15, 23, 42, 0) 70%);
}

.sustainability-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.sustainability-text p {
    font-size: 1.2rem;
    line-height: 1.8;
}

/* Contact Section */
#contact {
    background-color: var(--secondary-bg);
    position: relative;
}

#contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.05) 0%, rgba(15, 23, 42, 0) 70%);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.contact-text {
    margin-bottom: 30px;
}

.contact-text p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--primary-bg);
    color: var(--text-primary);
    padding: 60px 0 20px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-contact p {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
    padding-left: 15px;
}

.footer-links ul li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
}

.footer-links ul li a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

/* Responsive Styles */
@media screen and (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content h2 {
        font-size: 1.3rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    nav ul {
        display: none; /* Would be replaced with mobile menu in a real implementation */
    }
    
    .benefit-card, .stat-card, .application-card {
        transform: none !important;
    }
}