:root {
    --bg: #f7f8fb;
    --surface: #ffffff;
    --surface-muted: #eef4f1;
    --text: #18202a;
    --muted: #5d6875;
    --line: #dbe2e8;
    --green: #2d7d66;
    --ink: #111827;
    --shadow: 0 18px 48px rgba(24, 32, 42, 0.10);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, "Noto Sans KR", sans-serif;
    line-height: 1.65;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 16px clamp(20px, 5vw, 72px);
    background: rgba(247, 248, 251, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--ink);
    color: #fff;
    font-size: 0.9rem;
}

.site-nav,
.site-footer nav {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.site-nav a,
.site-footer a {
    color: var(--muted);
    font-size: 0.95rem;
    text-decoration: none;
}

.site-nav a:hover,
.site-footer a:hover {
    color: var(--text);
}

main {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: 32px;
    align-items: center;
    padding: 72px 0 52px;
}

.hero-copy h1 {
    max-width: 760px;
    margin: 0;
    font-size: clamp(2.4rem, 6vw, 4.8rem);
    line-height: 1.05;
    letter-spacing: 0;
}

.hero-copy p {
    max-width: 720px;
    margin: 22px 0 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--green);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.hero-panel,
.tool-section,
.principles,
.faq,
.content-grid article,
.page-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.hero-panel {
    padding: 24px;
}

.hero-panel dl {
    display: grid;
    gap: 16px;
    margin: 0;
}

.hero-panel div {
    padding: 18px;
    background: var(--surface-muted);
    border-radius: 8px;
}

.hero-panel dt {
    color: var(--muted);
    font-size: 0.88rem;
}

.hero-panel dd {
    margin: 4px 0 0;
    font-size: 1.3rem;
    font-weight: 700;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 22px;
}

.section-heading.wide {
    grid-column: 1 / -1;
}

.section-heading h2,
.principles h2,
.faq h2,
.page-card h1,
.page-card h2 {
    margin: 0;
    color: var(--ink);
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    line-height: 1.18;
    letter-spacing: 0;
}

.section-heading p,
.principles p,
.page-card p,
.page-card li {
    color: var(--muted);
}

.tool-section {
    padding: clamp(22px, 4vw, 36px);
    margin-bottom: 48px;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 48px;
}

.content-grid article {
    padding: 24px;
}

.content-grid h3 {
    margin: 0 0 10px;
    color: var(--ink);
    font-size: 1.2rem;
}

.content-grid p {
    margin: 0;
    color: var(--muted);
}

.principles {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
    gap: 28px;
    align-items: start;
    padding: clamp(24px, 4vw, 36px);
    margin-bottom: 48px;
}

.check-list {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.check-list li {
    padding: 14px 16px;
    background: var(--surface-muted);
    border-left: 4px solid var(--green);
    border-radius: 8px;
}

.faq {
    padding: clamp(24px, 4vw, 36px);
    margin-bottom: 64px;
}

.faq details {
    border-top: 1px solid var(--line);
    padding: 16px 0;
}

.faq summary {
    cursor: pointer;
    font-weight: 700;
}

.faq p {
    margin: 10px 0 0;
    color: var(--muted);
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    padding: 28px clamp(20px, 5vw, 72px);
    border-top: 1px solid var(--line);
    color: var(--muted);
    background: #fff;
}

.site-footer p {
    max-width: 680px;
    margin: 0;
}

.page-main {
    padding: 48px 0 72px;
}

.page-card {
    max-width: 900px;
    padding: clamp(24px, 5vw, 44px);
}

.page-card h2 {
    margin-top: 32px;
    font-size: 1.5rem;
}

.page-card ul {
    padding-left: 20px;
}

lotto-generator {
    display: block;
}

@media (max-width: 820px) {
    .site-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .hero,
    .principles,
    .content-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 42px;
    }

    .site-footer {
        flex-direction: column;
    }
}

@media (max-width: 520px) {
    main {
        width: min(100% - 24px, 1120px);
    }

    .site-nav {
        gap: 10px 14px;
    }

    .site-nav a {
        font-size: 0.9rem;
    }
}