/* ── GOODLUCKS Common Styles ── */
:root {
    --primary: #a29bfe;
    --accent: #00cec9;
    --bg: #0f0c29;
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f1f2f6;
    --text-sub: #a4b0be;
}

/* ── Utility ── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* 스킵 링크 — 포커스 시 화면에 표시 */
a.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary, #a29bfe);
    color: #0f0c29;
    padding: 8px 16px;
    z-index: 10000;
    font-weight: 700;
    border-radius: 0 0 8px 0;
    transition: top 0.2s;
    text-decoration: none;
    clip: rect(0,0,0,0);
}
a.skip-link:focus {
    top: 0;
    clip: auto;
}

/* 키보드 접근성 - focus-visible */
:focus-visible {
    outline: 2px solid var(--primary, #a29bfe);
    outline-offset: 3px;
    border-radius: 4px;
}
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--primary, #a29bfe);
    outline-offset: 3px;
}

body {
    font-family: 'Pretendard', sans-serif;
    line-height: 1.8;
    color: var(--text-main);
    background: radial-gradient(circle at top right, #302b63, #0f0c29, #24243e);
    background-attachment: fixed;
    margin: 0; padding: 0;
    letter-spacing: -0.02em;
    padding-top: 100px;
}

/* ── Header ── */
header.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 9999;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.header-content {
    width: 100%;
    max-width: 1200px;
    height: 70px;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
}
.logo { font-size: 1.3rem; font-weight: 700; color: #fff; text-decoration: none; letter-spacing: 0.05em; }
nav { display: flex; align-items: center; gap: 32px; justify-content: flex-end; }
nav a { text-decoration: none; color: var(--text-sub); font-weight: 500; font-size: 0.95rem; padding: 8px 0; transition: color 0.3s; position: relative; }
nav a:hover { color: #fff; }
nav a::after { content: ""; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px; background: #fff; transform: translateX(-50%); transition: width 0.3s ease; }
nav a:hover::after { width: 100%; }
.header-share { display: flex; align-items: center; gap: 6px; margin-left: 24px; padding-left: 24px; border-left: 1px solid rgba(255,255,255,0.15); }
.header-share button { background: none; border: none; cursor: pointer; font-size: 1.1rem; padding: 6px; line-height: 1; border-radius: 8px; transition: all 0.2s ease; color: rgba(255,255,255,0.7); display: flex; align-items: center; justify-content: center; }
.header-share button:hover { background: rgba(255,255,255,0.1); color: #fff; transform: scale(1.15); }
.hamburger-btn { display: none; background: none; border: none; color: #fff; font-size: 1.2rem; cursor: pointer; padding: 4px 8px; }

/* ── Footer ── */
footer {
    background: rgba(10, 10, 25, 0.98);
    padding: 5rem 2rem 3rem 2rem;
    border-top: 1px solid var(--glass-border);
    color: #a4b0be;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    text-align: left;
}
.footer-column { flex: 1; }
.footer-column.brand-col { flex: 1.5; }
.footer-column h4 { color: #ffffff; font-size: 1rem; font-weight: 700; margin: 0 0 1.5rem 0; letter-spacing: 0.5px; }
.footer-logo { font-size: 1.4rem; font-weight: 700; color: #ffffff; text-decoration: none; letter-spacing: 0.05em; display: block; margin-bottom: 1.2rem; }
.footer-desc { font-size: 0.9rem; line-height: 1.8; opacity: 0.8; margin-bottom: 1.2rem; word-break: keep-all; }
.footer-column nav { display: flex; flex-direction: column; gap: 1rem; align-items: flex-start; }
.footer-column nav a { text-decoration: none; color: inherit; font-size: 0.95rem; transition: 0.3s; padding: 0; }
.footer-column nav a:hover { color: #ffffff; transform: translateX(5px); }
.footer-column nav a::after { display: none; }
.copyright { font-size: 0.8rem; font-weight: 700; color: var(--primary); letter-spacing: 1px; margin-top: 1rem; }
.footer-bottom { max-width: 1200px; margin: 4rem auto 0 auto; padding-top: 2rem; border-top: 1px solid rgba(255, 255, 255, 0.08); text-align: center; }
.footer-disclaimer { font-size: 0.75rem; opacity: 0.5; max-width: 900px; margin: 0 auto; line-height: 1.7; word-break: keep-all; }

/* ── Glass Card ── */
.glass-card { background: rgba(255,255,255,0.03); backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px); border-radius: 32px; padding: 2.5rem; border: 1px solid var(--glass-border); box-shadow: 0 20px 50px rgba(0,0,0,0.3); }
/* ── SNS Share Buttons ── */
.share-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 2rem;
}
.share-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 8px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}
.share-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.3);
}
.share-btn .s-icon {
    font-size: 1.4rem;
    filter: grayscale(1) brightness(2);
}

.glass-card h1 { font-size: 2rem; font-weight: 900; margin-bottom: 2rem; background: linear-gradient(to right, #fff, var(--primary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.glass-card h2 { font-size: 1.25rem; font-weight: 700; color: var(--primary); margin: 2rem 0 0.8rem; }
.glass-card p { color: var(--text-sub); line-height: 1.8; margin-bottom: 1rem; }
.glass-card ul { color: var(--text-sub); padding-left: 1.5rem; line-height: 1.8; margin-bottom: 1rem; }
.glass-card li { margin-bottom: 0.4rem; }
.glass-card section { margin-bottom: 1.5rem; }
.glass-card strong { color: var(--text-main); }
.highlight { color: var(--primary); font-weight: 700; -webkit-text-fill-color: unset; }

/* ── Content Page ── */
.content-main { max-width: 820px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

/* ── Tablet (992px) ── */
@media (max-width: 992px) {
    .footer-container { flex-wrap: wrap; gap: 2rem; }
    .footer-column.brand-col { flex-basis: 100%; }
}

/* ── Mobile (768px) ── */
@media (max-width: 768px) {
    body { padding-top: 90px; }
    header.main-header {
        top: 15px;
        left: 0;
        width: 100%;
        height: 54px;
        background: transparent;
        border: none;
        box-shadow: none;
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 9999;
    }
    .header-content {
        width: 94%;
        max-width: 500px;
        height: 100%;
        padding: 0 15px;
        display: flex;
        justify-content: flex-start;
        align-items: center;
        gap: 6px;
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border-radius: 100px;
        border: 1px solid rgba(255, 255, 255, 0.2);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        margin: 0 auto;
        position: relative;
    }
    .logo {
        display: flex;
        align-items: center;
        font-size: 0.9rem;
        font-weight: 900;
        color: #fff;
        text-decoration: none;
        letter-spacing: 0.05em;
        flex-shrink: 0;
        white-space: nowrap;
        line-height: 1;
        height: 32px;
    }
    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.15rem;
        padding: 0;
        width: 32px;
        height: 32px;
        line-height: 1;
        order: -1;
        flex-shrink: 0;
    }
    .header-content nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        flex-direction: column;
        width: 200px;
        margin-top: 10px;
        background: rgba(0,0,0,0.85);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border-radius: 16px;
        border: 1px solid rgba(255,255,255,0.15);
        padding: 8px 0;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    header.main-header.nav-open .header-content nav {
        display: flex;
    }
    .header-content nav a {
        flex: none;
        text-align: center;
        font-size: 0.85rem;
        padding: 12px 20px;
        font-weight: 700;
        color: #fff;
        white-space: nowrap;
    }
    .header-content nav a::after { display: none; }
    .header-share { margin-left: auto; padding-left: 8px; gap: 2px; height: 32px; align-items: center; }
    .header-share button { font-size: 0.9rem; padding: 4px; }
    footer { padding: 4rem 1.5rem 6rem 1.5rem; }
    .footer-container { flex-direction: column; gap: 3rem; text-align: center; }
    .footer-column nav { align-items: center; }
    .footer-column nav a:hover { transform: translateY(-3px); }
    .footer-bottom { margin-top: 3rem; }
    .content-main { padding: 1.5rem 1rem 3rem; }
    .glass-card { padding: 1.5rem; border-radius: 20px; }
    .glass-card h1 { font-size: 1.5rem; }
}