:root {
    --bg-dark: #0a0e17;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(31, 41, 55, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(59, 130, 246, 0.3);
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --accent: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.15);
    --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

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

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

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    height: 72px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
}

.logo-mark {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 900;
}

.logo-text {
    color: var(--text-primary);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--primary-light);
}

.btn-nav {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid var(--border-highlight) !important;
    padding: 8px 18px;
    border-radius: 20px;
    color: var(--primary-light) !important;
    font-weight: 600 !important;
    transition: all 0.2s ease !important;
}

.btn-nav:hover {
    background: var(--primary) !important;
    color: white !important;
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.4);
}

/* ===== Hero Section ===== */
.hero-section {
    position: relative;
    padding-top: 160px;
    padding-bottom: 100px;
    text-align: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 350px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.25) 0%, rgba(6, 182, 212, 0.12) 40%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-highlight);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, #60a5fa 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    max-width: 680px;
    margin: 0 auto 36px;
    font-size: 1.15rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 72px;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.25s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #2563eb);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px 16px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: border-color 0.2s ease;
}

.stat-card:hover {
    border-color: var(--border-highlight);
}

.stat-number {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-light);
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Sections General ===== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-subtitle {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ===== About Us ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 36px 28px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.25s ease;
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    background: var(--bg-card-hover);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ===== Solutions ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 36px 28px;
    position: relative;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.25s ease;
}

.solution-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.solution-tag {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-light);
    background: rgba(59, 130, 246, 0.12);
    padding: 4px 10px;
    border-radius: 12px;
}

.solution-icon {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 1.25rem;
    margin-bottom: 14px;
    font-weight: 700;
}

.solution-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.solution-features {
    list-style: none;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.solution-features li {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.solution-features li::before {
    content: "✓";
    color: var(--accent);
    font-weight: bold;
}

/* ===== Tech Stack ===== */
.tech-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    max-width: 860px;
    margin: 0 auto;
}

.pill {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.pill:hover {
    border-color: var(--border-highlight);
    color: var(--primary-light);
    background: rgba(59, 130, 246, 0.08);
}

/* ===== Contact ===== */
.contact-box {
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.9), rgba(15, 23, 42, 0.95));
    border: 1px solid var(--border-highlight);
    border-radius: 24px;
    padding: 60px 48px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.contact-header {
    text-align: center;
    margin-bottom: 40px;
}

.contact-header h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.contact-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.contact-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 680px;
    margin: 0 auto;
}

.contact-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ci-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.ci-val {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    background: #080c14;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-muted);
    border-left: 1px solid var(--border-color);
    padding-left: 16px;
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-grid, .solutions-grid {
        grid-template-columns: 1fr;
    }
    .contact-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.3rem;
    }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    .footer-brand {
        flex-direction: column;
        gap: 8px;
    }
    .footer-brand p {
        border-left: none;
        padding-left: 0;
    }
}