:root {
    --bg: #0b0b0c;
    --card: #111114;
    --text: #f3f3f3;
    --muted: #b9b9b9;
    --line: #24242a;
    --max: 980px;
}

* {
    box-sizing: border-box
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 18px;
}

.header {
    position: sticky;
    top: 0;
    background: rgba(11, 11, 12, .75);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    z-index: 10;
}

.header-inner {
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo {
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: .2px;
}

.nav {
    display: flex;
    gap: 14px;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
}

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

.hero {
    padding: 84px 0 56px;
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(900px 400px at 20% 10%, rgba(255, 255, 255, .08), transparent 60%),
        radial-gradient(700px 340px at 80% 20%, rgba(255, 255, 255, .06), transparent 60%);
}

.hero h1 {
    font-size: 36px;
    line-height: 1.2;
    margin: 0 0 14px;
}

.sub {
    color: var(--muted);
    margin: 0 0 22px;
    max-width: 64ch
}

.section {
    padding: 46px 0;
    border-bottom: 1px solid var(--line);
}

.section h2 {
    margin: 0 0 12px;
    font-size: 20px;
}

.list {
    margin: 10px 0 0;
    padding-left: 18px;
    color: var(--text);
}

.note {
    color: var(--muted);
    margin-top: 10px
}

.btn {
    display: inline-block;
    padding: 12px 16px;
    border-radius: 12px;
    background: #f3f3f3;
    color: #0b0b0c;
    text-decoration: none;
    font-weight: 700;
    border: none;
    cursor: pointer;
}

.btn:hover {
    opacity: .92
}

.form {
    margin-top: 18px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px;
}

.form label {
    display: block;
    margin-bottom: 14px;
    font-size: 14px;
    color: var(--muted);
}

input,
textarea {
    width: 100%;
    margin-top: 6px;
    padding: 12px 12px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #0e0e11;
    color: var(--text);
    outline: none;
}

input:focus,
textarea:focus {
    border-color: #3a3a44
}

.form-result {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.footer {
    padding: 26px 0;
}

.footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
}

.footer-title {
    font-weight: 700
}

.footer-sub {
    color: var(--muted);
    font-size: 14px
}

@media (max-width:640px) {
    .nav {
        display: none
    }

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