/* ===== 상단 고정 네비게이션 바 (공통 컴포넌트) ===== */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    flex-wrap: wrap;
    gap: 12px;
    background: rgba(250,251,253,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: var(--header-h, 65px);
    z-index: 90;
    margin: 0 -20px 0;
    width: calc(100% + 40px);
}
.top-nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.top-nav .btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    box-sizing: border-box;
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    line-height: 20.797px;
    cursor: pointer;
    text-decoration: none;
}
.top-nav .btn-back:hover { border-color: var(--purple); color: var(--purple); background: var(--purple-soft); }

/* 전역 #wrap * letter-spacing 덮어쓰기 */
#wrap .top-nav .btn-back {
    letter-spacing: 0.02em;
}

/* 거래 요청하기 버튼 */
@keyframes tradeAurora {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes ctaRing {
    0% { box-shadow: 0 4px 14px rgba(37,99,235,0.45), 0 0 0 0 rgba(37,99,235,0.35); }
    60% { box-shadow: 0 4px 14px rgba(37,99,235,0.45), 0 0 0 8px rgba(37,99,235,0); }
    100% { box-shadow: 0 4px 14px rgba(37,99,235,0.45), 0 0 0 0 rgba(37,99,235,0); }
}

.btn-match-cta-top {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    box-sizing: border-box;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    white-space: nowrap;
    background: linear-gradient(135deg, #3b82f6, #6366f1, #2563eb, #818cf8, #1d4ed8, #3b82f6);
    background-size: 300% 300%;
    animation: tradeAurora 4s ease infinite, ctaRing 2.5s ease-out infinite;
    transition: box-shadow 0.2s, transform 0.2s;
}
.btn-match-cta-top:hover {
    box-shadow: 0 6px 20px rgba(37,99,235,0.65);
    transform: scale(1.03);
}

/* 전역 #wrap * letter-spacing 덮어쓰기 */
#wrap .top-nav .btn-match-cta-top {
    letter-spacing: 0.022em;
}

/* 아이콘 버튼 (관심기업, 공유하기) */
.btn-topnav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
    color: #888;
    transition: all 0.2s;
}
.btn-topnav-icon:hover { border-color: #c5c5c5; color: #333; background: #f9fafb; }

@media (max-width: 768px) {
    .top-nav {
        flex-wrap: nowrap;
        padding: 8px 16px;
        margin: 0 -16px;
        width: calc(100% + 32px);
        gap: 8px;
    }
    .top-nav-actions {
        flex-wrap: nowrap;
        gap: 8px;
        flex: 1;
        min-width: 0;
    }
    .top-nav .btn-back {
        padding: 9px 12px;
        font-size: 12px;
        white-space: nowrap;
        flex-shrink: 0;
    }
    .btn-match-cta-top {
        flex: 1;
        min-width: 0;
        padding: 9px 10px;
        font-size: 13px;
        justify-content: center;
        white-space: nowrap;
    }
    .btn-topnav-icon,
    .btn-favorite {
        width: 38px;
        height: 38px;
        flex-shrink: 0;
    }
}