:root {
    --bg-color: #0a0a0a;
    --text-color: #f0f0f0;
    --accent-color: #00ff88;
    /* Neon Green/Mint for futuristic feel */
    --secondary-color: #888888;
    --font-main: 'Inter', sans-serif;
    --font-kr: 'Noto Sans KR', sans-serif;
    --header-height: 80px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Scroll Animation Utilities */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.active {
    opacity: 1;
    transform: translateY(0);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-kr);
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* Header */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    color: var(--accent-color);
}

nav ul {
    display: flex;
    gap: 2rem;
}

nav a {
    font-size: 0.9rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

nav a:hover {
    color: var(--accent-color);
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding-top: var(--header-height);
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.7)), url('assets/images/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-content {
    z-index: 1;
    opacity: 0;
    /* JS animation will handle this */
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
}

.hero-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-content h1 {
    font-size: 5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: #fff;
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
    letter-spacing: -2px;
}

.hero-content p {
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
}

.hero-content p::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--accent-color);
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    animation: bounce 2s infinite;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 3px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, #fff, transparent);
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

/* Common Section Styles */
section {
    padding: 100px 5%;
    position: relative;
}

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

.section-header {
    margin-bottom: 4rem;
    text-align: center;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #fff;
}

.section-header .subtitle {
    color: var(--accent-color);
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.highlight {
    color: var(--accent-color);
}

/* About Section */
#about {
    background-color: #111;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    line-height: 1.4;
    color: #fff;
}

.about-text p {
    font-size: 1.1rem;
    color: #aaa;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.stats {
    display: flex;
    gap: 3rem;
}

.stats li {
    display: flex;
    flex-direction: column;
}

.stats .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.5rem;
}

.stats .label {
    font-size: 0.9rem;
    color: var(--secondary-color);
    text-transform: uppercase;
}

.about-image {
    height: 400px;
    border: 1px solid #333;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    /* Soften edges slightly */
}

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

.about-image:hover img {
    transform: scale(1.05);
    /* Subtle zoom effect */
}

/* Business Section */
#business {
    background-color: #0a0a0a;
    overflow: hidden;
    /* Import for slider */
    padding-left: 0;
    padding-right: 0;
}

#business .container {
    padding: 0 5%;
}

/* Slider Container */
.business-slider {
    margin-top: 2rem;
    position: relative;
    width: 100%;
}

.business-slider::before,
.business-slider::after {
    content: "";
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    /* Let clicks pass through */
}

.business-slider::before {
    left: 0;
    background: linear-gradient(to right, #0a0a0a, transparent);
}

.business-slider::after {
    right: 0;
    background: linear-gradient(to left, #0a0a0a, transparent);
}

/* Slider Track */
.slider-track {
    display: flex;
    width: calc(400px * 12);
    /* 3 cards * 4 sets * width */
    animation: scroll 40s linear infinite;
    gap: 2rem;
}

.slider-track:hover {
    animation-play-state: paused;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-400px * 3 - 2rem * 3));
    }

    /* Slide width of one full set (3 cards) */
}

.business-card {
    width: 400px;
    /* Fixed width for slider */
    flex-shrink: 0;
    background: #151515;
    padding: 3rem 2rem;
    border: 1px solid #333;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.business-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
}

.business-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #fff;
}

.business-card p {
    color: #888;
    line-height: 1.6;
    font-size: 0.95rem;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.business-card:hover::before {
    transform: scaleX(1);
}

/* Contact Section */
#contact {
    background-color: #111;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: #aaa;
    line-height: 1.8;
}

.contact-info .address {
    margin-bottom: 2rem;
}

.contact-details p strong {
    color: #fff;
    margin-right: 10px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: #0a0a0a;
    border: 1px solid #333;
    color: #fff;
    font-family: var(--font-main);
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.submit-btn {
    padding: 1rem 2rem;
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    background: var(--accent-color);
    color: #000;
}

/* Footer */
footer {
    background: #000;
    padding: 3rem 5%;
    border-top: 1px solid #222;
}

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

.footer-logo {
    color: #fff;
    font-weight: 900;
    font-size: 1.2rem;
}

footer p {
    color: #555;
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}

.about-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(45deg,
            rgba(0, 0, 0, 0.1),
            rgba(0, 0, 0, 0.1) 10px,
            rgba(0, 0, 0, 0.2) 10px,
            rgba(0, 0, 0, 0.2) 20px);
}

.image-placeholder {
    color: #555;
    font-weight: 700;
    letter-spacing: 0.1em;
}

/* Responsive */
@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 3rem;
    }
}