/* Global Styles & Variables */
:root {
    --primary-color: #007aff;
    --primary-gradient: linear-gradient(135deg, #007aff 0%, #00d2ff 100%);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables (Default) */
[data-theme="dark"] {
    --bg-dark: #0a0a0b;
    --bg-card: #161618;
    --text-main: #ffffff;
    --text-muted: #a1a1a6;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --header-bg: rgba(10, 10, 11, 0.8);
}

/* Light Mode Variables */
[data-theme="light"] {
    --bg-dark: #f5f5f7;
    --bg-card: #ffffff;
    --text-main: #1d1d1f;
    --text-muted: #86868b;
    --glass-bg: rgba(0, 0, 0, 0.05);
    --glass-border: rgba(0, 0, 0, 0.1);
    --header-bg: rgba(255, 255, 255, 0.8);
}

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

html {
    scroll-behavior: smooth;
}

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

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
    opacity: 0.5;
}

.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
    filter: blur(50px);
}

[data-theme="light"] .cursor-glow {
    background: radial-gradient(circle, rgba(0, 122, 255, 0.1) 0%, transparent 70%);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Layout Containers */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 100px 0;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

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

.logo img {
    display: block;
    max-width: 100%;
}

[data-theme="light"] .footer-logo img {
    filter: none; /* 라이트 모드 푸터가 밝을 경우 반전 제거 */
}

.footer-logo img {
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--glass-border);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at top right, rgba(0, 122, 255, 0.15), transparent 40%),
                radial-gradient(circle at bottom left, rgba(0, 210, 255, 0.1), transparent 40%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.png') no-repeat center center/cover;
    opacity: 0.4;
    z-index: -1;
}

.hero-content {
    max-width: 800px;
}

.hero-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.cta-group {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    box-shadow: 0 10px 20px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
}

.btn-secondary:hover {
    background: var(--glass-border);
}

/* Services Section */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--glass-bg);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.solution-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.solution-list li {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
    padding-left: 1.2rem;
    position: relative;
}

.solution-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.solution-list li strong {
    color: var(--text-main);
    font-weight: 600;
    display: block;
    margin-bottom: 0.2rem;
}

/* About / Stats Section */
.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 32px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item h4 {
    font-size: 2.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-muted);
    font-weight: 500;
}

/* Location Section */
.location-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: start;
}

.map-container {
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.location-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.info-icon {
    width: 48px;
    height: 48px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.info-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Dynamic Values (Floating Cards) */
.floating-cards {
    display: flex;
    gap: 1.5rem;
    padding: 1rem 0;
}

.hero-floating-cards {
    justify-content: flex-start;
    margin-top: 3rem;
    flex-wrap: nowrap;
}

.float-card {
    background: rgba(22, 22, 24, 0.5); /* 50% Transparency */
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    width: 140px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    animation: float 6s ease-in-out infinite;
    animation-delay: var(--d);
    transition: var(--transition);
}

[data-theme="light"] .float-card {
    background: rgba(255, 255, 255, 0.5);
}

.float-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px) scale(1.05);
    background: rgba(22, 22, 24, 0.7);
}

[data-theme="light"] .float-card:hover {
    background: rgba(255, 255, 255, 0.7);
}

.float-card i {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.float-card span {
    font-weight: 700;
    font-size: 0.95rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-15px) rotate(1deg); }
    66% { transform: translateY(8px) rotate(-1deg); }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2); /* 배경이 투명하게 보이도록 대폭 낮춤 */
    backdrop-filter: none; /* 블러 효과 제거 */
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    width: 90%;
    max-width: 500px;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    position: relative;
}

.modal-header {
    padding: 1.5rem 2rem;
    background: var(--glass-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h3 {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--primary-color);
    font-weight: 800;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    padding: 3rem 2rem;
    text-align: center;
}

.modal-body h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--text-main);
    letter-spacing: -1px;
}

.recruit-info {
    text-align: left;
    background: var(--glass-bg);
    padding: 2rem;
    border-radius: 20px;
    margin-bottom: 1.5rem;
}

.recruit-info ul {
    list-style: none;
}

.recruit-info li {
    margin-bottom: 1rem;
    color: var(--text-main);
    font-size: 1rem;
    display: flex;
    gap: 0.5rem;
}

.recruit-info li span {
    color: var(--primary-color);
    font-weight: 800;
}

.recruit-footer {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.modal-footer {
    padding: 1rem 2rem;
    background: var(--glass-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--glass-border);
}

.today-close {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.btn-close {
    padding: 0.6rem 1.5rem;
    background: var(--primary-gradient);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
}

/* Background Orbs */
.orb {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.3;
    animation: drift 20s linear infinite;
}

.orb-1 {
    background: radial-gradient(circle, var(--primary-color), transparent);
    top: -10%;
    right: -5%;
}

.orb-2 {
    background: radial-gradient(circle, #00d2ff, transparent);
    bottom: -10%;
    left: -5%;
}

@keyframes drift {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(100px, 50px) scale(1.1); }
    66% { transform: translate(-50px, 100px) scale(0.9); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Footer */
footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 0.5fr 0.5fr 40%;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-desc {
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links h5 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

.footer-links ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: 0.8s ease-out;
}

[data-aos].active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .about-split {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 3rem;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}