/* Nexon Lv1 Gothic Web Font */
@import url('https://cdn.jsdelivr.net/gh/niceplugin/Nexon-Lv1-Gothic@latest/font.css');

/* CSS Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-black: #1a1a1a;
    --color-dark-gray: #333333;
    --color-gray: #666666;
    --color-light-gray: #999999;
    --color-lighter-gray: #cccccc;
    --color-border: #e0e0e0;
    --color-white: #ffffff;
    --color-bg-alt: #fafafa;

    /* Lime accent colors */
    --color-lime: #a4e335;
    --color-lime-light: #c5f05a;
    --color-lime-dark: #7cb518;
    --color-lime-glow: rgba(164, 227, 53, 0.15);

    --font-main: 'NEXON Lv1 Gothic', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --line-thin: 1px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-white);
    color: var(--color-dark-gray);
    line-height: 1.7;
    font-size: 16px;
    letter-spacing: -0.02em;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: var(--line-thin) solid var(--color-border);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo a {
    font-size: 18px;
    font-weight: bold;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.logo .dot {
    color: var(--color-lime);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    color: var(--color-gray);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    letter-spacing: 0.02em;
}

.nav-links a:hover {
    color: var(--color-lime-dark);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    border-bottom: var(--line-thin) solid var(--color-border);
}

.hero-content {
    max-width: 800px;
    padding: 0 40px;
}

/* Profile Image */
.profile-image {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin: 0 auto 40px;
    overflow: hidden;
    border: 3px solid var(--color-lime);
    box-shadow: 0 0 30px var(--color-lime-glow);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero h1 {
    font-size: 42px;
    font-weight: bold;
    color: var(--color-black);
    letter-spacing: -0.04em;
    margin-bottom: 16px;
    line-height: 1.3;
}

.hero h1 .highlight {
    color: var(--color-lime-dark);
}

.tagline {
    font-size: 14px;
    color: var(--color-lime-dark);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 40px;
    font-weight: bold;
}

.hero-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-lime), var(--color-lime-dark));
    margin: 0 auto 40px;
}

.hero-description {
    font-size: 18px;
    color: var(--color-gray);
    line-height: 1.9;
}

/* Sections */
.section {
    padding: 120px 0;
    border-bottom: var(--line-thin) solid var(--color-border);
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section h2 {
    font-size: 32px;
    font-weight: bold;
    color: var(--color-black);
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.section-line {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-lime), var(--color-lime-dark));
    margin-bottom: 60px;
}

/* About Section */
.about-content {
    max-width: 700px;
}

.about-content p {
    font-size: 17px;
    color: var(--color-gray);
    margin-bottom: 20px;
    line-height: 1.9;
}

/* Expertise Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.expertise-item {
    padding: 40px 30px;
    border: var(--line-thin) solid var(--color-border);
    background-color: var(--color-white);
    transition: var(--transition);
}

.expertise-item:hover {
    border-color: var(--color-lime);
    box-shadow: 0 0 20px var(--color-lime-glow);
}

.expertise-icon {
    font-size: 12px;
    font-weight: bold;
    color: var(--color-lime-dark);
    letter-spacing: 0.1em;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-lime);
}

.expertise-item h3 {
    font-size: 16px;
    font-weight: bold;
    color: var(--color-black);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.expertise-item p {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.7;
}

/* Services Section */
.services-list {
    max-width: 800px;
}

.service-item {
    display: flex;
    align-items: flex-start;
    padding: 40px 0;
    border-bottom: var(--line-thin) solid var(--color-border);
}

.service-item:last-child {
    border-bottom: none;
}

.service-number {
    font-size: 12px;
    color: var(--color-lime-dark);
    letter-spacing: 0.05em;
    margin-right: 40px;
    min-width: 30px;
    font-weight: bold;
}

.service-content h3 {
    font-size: 18px;
    font-weight: bold;
    color: var(--color-black);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.service-content p {
    font-size: 15px;
    color: var(--color-gray);
}

/* Contact Section */
.contact-content {
    text-align: center;
    padding: 40px 0;
}

.contact-content p {
    font-size: 17px;
    color: var(--color-gray);
    margin-bottom: 30px;
}

.contact-link {
    font-size: 24px;
    color: var(--color-black);
    text-decoration: none;
    border-bottom: 2px solid var(--color-lime);
    padding-bottom: 4px;
    transition: var(--transition);
    letter-spacing: -0.02em;
}

.contact-link:hover {
    color: var(--color-lime-dark);
    border-color: var(--color-lime-dark);
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 30px;
}

.social-links a {
    color: var(--color-gray);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--color-lime-dark);
    border-color: var(--color-lime);
    background-color: var(--color-lime-glow);
}

/* Footer */
footer {
    padding: 60px 0;
    background-color: var(--color-white);
}

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

.footer-logo {
    font-size: 16px;
    font-weight: bold;
    color: var(--color-black);
    letter-spacing: -0.03em;
}

.footer-logo .dot {
    color: var(--color-lime);
}

.copyright {
    font-size: 13px;
    color: var(--color-light-gray);
}

/* Responsive */
@media (max-width: 1024px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }

    .nav-links {
        gap: 24px;
    }

    .hero {
        padding-top: 140px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }

    .hero-description {
        font-size: 16px;
    }

    .section {
        padding: 80px 0;
    }

    .section h2 {
        font-size: 26px;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .service-item {
        flex-direction: column;
        gap: 12px;
    }

    .service-number {
        margin-right: 0;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .contact-link {
        font-size: 18px;
    }

    .container {
        padding: 0 24px;
    }

    .social-links {
        flex-wrap: wrap;
    }
}

/* Selection */
::selection {
    background-color: var(--color-lime);
    color: var(--color-black);
}